Linux 下Shell的学习3-优秀demo

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cat /etc/init.d/functions   –>里面有颜色定义
cat /etc/rc.d/rc.sysinit
cat /etc/init.d/nfs
cat /etc/init.d/portmap
cat /etc/init.d/httpd

 

0. function文件

  1 # -*-Shell-script-*-
  2 #
  3 # functions    This file contains functions to be used by most or all
  4 #        shell scripts in the /etc/init.d directory.
  5 #
  6 
  7 TEXTDOMAIN=initscripts
  8 
  9 # Make sure umask is sane
 10 umask 022
 11 
 12 # Set up a default search path.
 13 PATH="/sbin:/usr/sbin:/bin:/usr/bin"
 14 export PATH
 15 
 16 # Get a sane screen width
 17 [ -z "${COLUMNS:-}" ] && COLUMNS=80
 18 
 19 [ -z "${CONSOLETYPE:-}" ] && CONSOLETYPE="$(/sbin/consoletype)"
 20 
 21 if [ -f /etc/sysconfig/i18n -a -z "${NOLOCALE:-}" -a -z "${LANGSH_SOURCED:-}" ] ; then
 22   . /etc/profile.d/lang.sh 2>/dev/null
 23   # avoid propagating LANGSH_SOURCED any further
 24   unset LANGSH_SOURCED
 25 fi
 26 
 27 # Read in our configuration
 28 if [ -z "${BOOTUP:-}" ]; then
 29   if [ -f /etc/sysconfig/init ]; then
 30       . /etc/sysconfig/init
 31   else
 32     # This all seem confusing? Look in /etc/sysconfig/init,
 33     # or in /usr/doc/initscripts-*/sysconfig.txt
 34     BOOTUP=color
 35     RES_COL=60
 36     MOVE_TO_COL="echo -en \\033[${RES_COL}G"
 37     SETCOLOR_SUCCESS="echo -en \\033[1;32m"
 38     SETCOLOR_FAILURE="echo -en \\033[1;31m"
 39     SETCOLOR_WARNING="echo -en \\033[1;33m"
 40     SETCOLOR_NORMAL="echo -en \\033[0;39m"
 41     LOGLEVEL=1
 42   fi
 43   if [ "$CONSOLETYPE" = "serial" ]; then
 44       BOOTUP=serial
 45       MOVE_TO_COL=
 46       SETCOLOR_SUCCESS=
 47       SETCOLOR_FAILURE=
 48       SETCOLOR_WARNING=
 49       SETCOLOR_NORMAL=
 50   fi
 51 fi
 52 
 53 # Interpret escape sequences in an fstab entry
 54 fstab_decode_str() {
 55     fstab-decode echo "$1"
 56 }
 57 
 58 # Check if any of $pid (could be plural) are running
 59 checkpid() {
 60     local i
 61 
 62     for i in $* ; do
 63         [ -d "/proc/$i" ] && return 
 64     done
 65     return 1
 66 }
 67 
 68 __readlink() {
 69     ls -bl "$@" 2>/dev/null| awk '{ print $NF }'
 70 }
 71 
 72 __fgrep() {
 73     s=$1
 74     f=$2
 75     while read line; do
 76     if strstr "$line" "$s"; then
 77         echo $line
 78         return 
 79     fi
 80     done < $f
 81     return 1
 82 }
 83 
 84 # __umount_loop awk_program fstab_file first_msg retry_msg retry_umount_args
 85 # awk_program should process fstab_file and return a list of fstab-encoded
 86 # paths; it doesn't have to handle comments in fstab_file.
 87 __umount_loop() {
 88     local remaining sig=
 89     local retry=3 count
 90 
 91     remaining=$(LC_ALL=C awk "/^#/ {next} $1" "$2" | sort -r)
 92     while [ -n "$remaining" -a "$retry" -gt  ]; do
 93         if [ "$retry" -eq 3 ]; then
 94             action "$3" fstab-decode umount $remaining
 95         else
 96             action "$4" fstab-decode umount $5 $remaining
 97         fi
 98         count=4
 99         remaining=$(LC_ALL=C awk "/^#/ {next} $1" "$2" | sort -r)
100         while [ "$count" -gt  ]; do
101             [ -z "$remaining" ] && break
102             count=$(($count-1))
103             usleep 500000
104             remaining=$(LC_ALL=C awk "/^#/ {next} $1" "$2" | sort -r)
105         done
106         [ -z "$remaining" ] && break
107         fstab-decode /sbin/fuser -m $remaining 2>/dev/null  | sed -e "s/\b$$\b//" | xargs kill $sig >/dev/null
108         sleep 3
109         retry=$(($retry -1))
110         sig=-9
111     done
112 }
113 
114 # Similar to __umount loop above, specialized for loopback devices
115 __umount_loopback_loop() {
116     local remaining devremaining sig=
117     local retry=3
118 
119     remaining=$(awk '$1 ~ /^\/dev\/loop/ && $2 != "/" {print $2}' /proc/mounts)
120     devremaining=$(awk '$1 ~ /^\/dev\/loop/ && $2 != "/" {print $1}' /proc/mounts)
121     while [ -n "$remaining" -a "$retry" -gt  ]; do
122         if [ "$retry" -eq 3 ]; then
123             action $"Unmounting loopback filesystems: " \
124                 fstab-decode umount $remaining
125         else
126             action $"Unmounting loopback filesystems (retry):" \
127                 fstab-decode umount $remaining
128         fi
129         for dev in $devremaining ; do
130             losetup $dev > /dev/null 2>&1 && \
131                 action $"Detaching loopback device $dev: " \
132                 losetup -d $dev
133         done
134         remaining=$(awk '$1 ~ /^\/dev\/loop/ && $2 != "/" {print $2}' /proc/mounts)
135         devremaining=$(awk '$1 ~ /^\/dev\/loop/ && $2 != "/" {print $1}' /proc/mounts)
136         [ -z "$remaining" ] && break
137         fstab-decode /sbin/fuser -k -m $sig $remaining >/dev/null
138         sleep 3
139         retry=$(($retry -1))
140         sig=-9
141     done
142 }
143 
144 # __proc_pids {program} [pidfile]
145 # Set $pid to pids from /var/run* for {program}.  $pid should be declared
146 # local in the caller.
147 # Returns LSB exit code for the 'status' action.
148 __pids_var_run() {
149     local base=${1##*/}
150     local pid_file=${2:-/var/run/$base.pid}
151 
152     pid=
153     if [ -f "$pid_file" ] ; then
154             local line p
155 
156         [ ! -r "$pid_file" ] && return 4 # "user had insufficient privilege"
157         while : ; do
158             read line
159             [ -z "$line" ] && break
160             for p in $line ; do
161                 [ -z "${p//[0-9]/}" -a -d "/proc/$p" ] && pid="$pid $p"
162             done
163         done < "$pid_file"
164 
165             if [ -n "$pid" ]; then
166                     return 
167             fi
168         return 1 # "Program is dead and /var/run pid file exists"
169     fi
170     return 3 # "Program is not running"
171 }
172 
173 # Output PIDs of matching processes, found using pidof
174 __pids_pidof() {
175     pidof -c -o $$ -o $PPID -o %PPID -x "$1" || \
176         pidof -c -o $$ -o $PPID -o %PPID -x "${1##*/}"
177 }
178 
179 
180 # A function to start a program.
181 daemon() {
182     # Test syntax.
183     local gotbase= force= nicelevel corelimit
184     local pid base= user= nice= bg= pid_file=
185     local cgroup=
186     nicelevel=
187     while [ "$1" != "${1##[-+]}" ]; do
188       case $1 in
189         '')    echo $"$0: Usage: daemon [+/-nicelevel] {program}"
190                return 1;;
191         --check)
192            base=$2
193            gotbase="yes"
194            shift 2
195            ;;
196         --check=?*)
197                base=${1#--check=}
198            gotbase="yes"
199            shift
200            ;;
201         --user)
202            user=$2
203            shift 2
204            ;;
205         --user=?*)
206                user=${1#--user=}
207            shift
208            ;;
209         --pidfile)
210            pid_file=$2
211            shift 2
212            ;;
213         --pidfile=?*)
214            pid_file=${1#--pidfile=}
215            shift
216            ;;
217         --force)
218                force="force"
219            shift
220            ;;
221         [-+][-9]*)
222                nice="nice -n $1"
223                shift
224            ;;
225         *)     echo $"$0: Usage: daemon [+/-nicelevel] {program}"
226                return 1;;
227       esac
228     done
229 
230         # Save basename.
231         [ -z "$gotbase" ] && base=${1##*/}
232 
233         # See if it's already running. Look *only* at the pid file.
234     __pids_var_run "$base" "$pid_file"
235 
236     [ -n "$pid" -a -z "$force" ] && return
237 
238     # make sure it doesn't core dump anywhere unless requested
239     corelimit="ulimit -S -c ${DAEMON_COREFILE_LIMIT:-0}"
240     
241     # if they set NICELEVEL in /etc/sysconfig/foo, honor it
242     [ -n "${NICELEVEL:-}" ] && nice="nice -n $NICELEVEL"
243     
244     # if they set CGROUP_DAEMON in /etc/sysconfig/foo, honor it
245     if [ -n "${CGROUP_DAEMON}" ]; then
246         if [ ! -x /bin/cgexec ]; then
247             echo -n "Cgroups not installed"; warning
248             echo
249         else
250             cgroup="/bin/cgexec";
251             for i in $CGROUP_DAEMON; do
252                 cgroup="$cgroup -g $i";
253             done
254         fi
255     fi
256 
257     # Echo daemon
258         [ "${BOOTUP:-}" = "verbose" -a -z "${LSB:-}" ] && echo -n " $base"
259 
260     # And start it up.
261     if [ -z "$user" ]; then
262        $cgroup $nice /bin/bash -c "$corelimit >/dev/null 2>&1 ; $*"
263     else
264        $cgroup $nice runuser -s /bin/bash $user -c "$corelimit >/dev/null 2>&1 ; $*"
265     fi
266 
267     [ "$?" -eq  ] && success $"$base startup" || failure $"$base startup"
268 }
269 
270 # A function to stop a program.
271 killproc() {
272     local RC killlevel= base pid pid_file= delay
273 
274     RC=; delay=3
275     # Test syntax.
276     if [ "$#" -eq  ]; then
277         echo $"Usage: killproc [-p pidfile] [ -d delay] {program} [-signal]"
278         return 1
279     fi
280     if [ "$1" = "-p" ]; then
281         pid_file=$2
282         shift 2
283     fi
284     if [ "$1" = "-d" ]; then
285         delay=$2
286         shift 2
287     fi
288         
289 
290     # check for second arg to be kill level
291     [ -n "${2:-}" ] && killlevel=$2
292 
293         # Save basename.
294         base=${1##*/}
295 
296         # Find pid.
297     __pids_var_run "$1" "$pid_file"
298     RC=$?
299     if [ -z "$pid" ]; then
300         if [ -z "$pid_file" ]; then
301             pid="$(__pids_pidof "$1")"
302         else
303             [ "$RC" = "4" ] && { failure $"$base shutdown" ; return $RC ;}
304         fi
305     fi
306 
307         # Kill it.
308         if [ -n "$pid" ] ; then
309                 [ "$BOOTUP" = "verbose" -a -z "${LSB:-}" ] && echo -n "$base "
310         if [ -z "$killlevel" ] ; then
311                if checkpid $pid 2>&1; then
312                # TERM first, then KILL if not dead
313                kill -TERM $pid >/dev/null 2>&1
314                usleep 100000
315                if checkpid $pid && sleep 1 &&
316                   checkpid $pid && sleep $delay &&
317                   checkpid $pid ; then
318                                 kill -KILL $pid >/dev/null 2>&1
319                 usleep 100000
320                fi
321                 fi
322             checkpid $pid
323             RC=$?
324             [ "$RC" -eq  ] && failure $"$base shutdown" || success $"$base shutdown"
325             RC=$((! $RC))
326         # use specified level only
327         else
328                 if checkpid $pid; then
329                         kill $killlevel $pid >/dev/null 2>&1
330                 RC=$?
331                 [ "$RC" -eq  ] && success $"$base $killlevel" || failure $"$base $killlevel"
332             elif [ -n "${LSB:-}" ]; then
333                 RC=7 # Program is not running
334             fi
335         fi
336     else
337         if [ -n "${LSB:-}" -a -n "$killlevel" ]; then
338             RC=7 # Program is not running
339         else
340             failure $"$base shutdown"
341             RC=
342         fi
343     fi
344 
345         # Remove pid file if any.
346     if [ -z "$killlevel" ]; then
347             rm -f "${pid_file:-/var/run/$base.pid}"
348     fi
349     return $RC
350 }
351 
352 # A function to find the pid of a program. Looks *only* at the pidfile
353 pidfileofproc() {
354     local pid
355 
356     # Test syntax.
357     if [ "$#" =  ] ; then
358         echo $"Usage: pidfileofproc {program}"
359         return 1
360     fi
361 
362     __pids_var_run "$1"
363     [ -n "$pid" ] && echo $pid
364     return 
365 }
366 
367 # A function to find the pid of a program.
368 pidofproc() {
369     local RC pid pid_file=
370 
371     # Test syntax.
372     if [ "$#" =  ]; then
373         echo $"Usage: pidofproc [-p pidfile] {program}"
374         return 1
375     fi
376     if [ "$1" = "-p" ]; then
377         pid_file=$2
378         shift 2
379     fi
380     fail_code=3 # "Program is not running"
381 
382     # First try "/var/run/*.pid" files
383     __pids_var_run "$1" "$pid_file"
384     RC=$?
385     if [ -n "$pid" ]; then
386         echo $pid
387         return 
388     fi
389 
390     [ -n "$pid_file" ] && return $RC
391     __pids_pidof "$1" || return $RC
392 }
393 
394 status() {
395     local base pid lock_file= pid_file=
396 
397     # Test syntax.
398     if [ "$#" =  ] ; then
399         echo $"Usage: status [-p pidfile] {program}"
400         return 1
401     fi
402     if [ "$1" = "-p" ]; then
403         pid_file=$2
404         shift 2
405     fi
406     if [ "$1" = "-l" ]; then
407         lock_file=$2
408         shift 2
409     fi
410     base=${1##*/}
411 
412     # First try "pidof"
413     __pids_var_run "$1" "$pid_file"
414     RC=$?
415     if [ -z "$pid_file" -a -z "$pid" ]; then
416         pid="$(__pids_pidof "$1")"
417     fi
418     if [ -n "$pid" ]; then
419             echo $"${base} (pid $pid) is running..."
420             return 
421     fi
422 
423     case "$RC" in
424         )
425             echo $"${base} (pid $pid) is running..."
426             return 
427             ;;
428         1)
429                     echo $"${base} dead but pid file exists"
430                     return 1
431             ;;
432         4)
433             echo $"${base} status unknown due to insufficient privileges."
434             return 4
435             ;;
436     esac
437     if [ -z "${lock_file}" ]; then
438         lock_file=${base}
439     fi
440     # See if /var/lock/subsys/${lock_file} exists
441     if [ -f /var/lock/subsys/${lock_file} ]; then
442         echo $"${base} dead but subsys locked"
443         return 2
444     fi
445     echo $"${base} is stopped"
446     return 3
447 }
448 
449 echo_success() {
450   [ "$BOOTUP" = "color" ] && $MOVE_TO_COL
451   echo -n "["
452   [ "$BOOTUP" = "color" ] && $SETCOLOR_SUCCESS
453   echo -n $"  OK  "
454   [ "$BOOTUP" = "color" ] && $SETCOLOR_NORMAL
455   echo -n "]"
456   echo -ne "\r"
457   return 
458 }
459 
460 echo_failure() {
461   [ "$BOOTUP" = "color" ] && $MOVE_TO_COL
462   echo -n "["
463   [ "$BOOTUP" = "color" ] && $SETCOLOR_FAILURE
464   echo -n $"FAILED"
465   [ "$BOOTUP" = "color" ] && $SETCOLOR_NORMAL
466   echo -n "]"
467   echo -ne "\r"
468   return 1
469 }
470 
471 echo_passed() {
472   [ "$BOOTUP" = "color" ] && $MOVE_TO_COL
473   echo -n "["
474   [ "$BOOTUP" = "color" ] && $SETCOLOR_WARNING
475   echo -n $"PASSED"
476   [ "$BOOTUP" = "color" ] && $SETCOLOR_NORMAL
477   echo -n "]"
478   echo -ne "\r"
479   return 1
480 }
481 
482 echo_warning() {
483   [ "$BOOTUP" = "color" ] && $MOVE_TO_COL
484   echo -n "["
485   [ "$BOOTUP" = "color" ] && $SETCOLOR_WARNING
486   echo -n $"WARNING"
487   [ "$BOOTUP" = "color" ] && $SETCOLOR_NORMAL
488   echo -n "]"
489   echo -ne "\r"
490   return 1
491 }
492 
493 # Inform the graphical boot of our current state
494 update_boot_stage() {
495   if [ -x /bin/plymouth ]; then
496       /bin/plymouth --update="$1"
497   fi
498   return 
499 }
500 
501 # Log that something succeeded
502 success() {
503   [ "$BOOTUP" != "verbose" -a -z "${LSB:-}" ] && echo_success
504   return 
505 }
506 
507 # Log that something failed
508 failure() {
509   local rc=$?
510   [ "$BOOTUP" != "verbose" -a -z "${LSB:-}" ] && echo_failure
511   [ -x /bin/plymouth ] && /bin/plymouth --details
512   return $rc
513 }
514 
515 # Log that something passed, but may have had errors. Useful for fsck
516 passed() {
517   local rc=$?
518   [ "$BOOTUP" != "verbose" -a -z "${LSB:-}" ] && echo_passed
519   return $rc
520 }  
521 
522 # Log a warning
523 warning() {
524   local rc=$?
525   [ "$BOOTUP" != "verbose" -a -z "${LSB:-}" ] && echo_warning
526   return $rc
527 }  
528 
529 # Run some action. Log its output.
530 action() {
531   local STRING rc
532 
533   STRING=$1
534   echo -n "$STRING "
535   shift
536   "$@" && success $"$STRING" || failure $"$STRING"
537   rc=$?
538   echo
539   return $rc
540 }
541 
542 # returns OK if $1 contains $2
543 strstr() {
544   [ "${1#*$2*}" = "$1" ] && return 1
545   return 
546 }
547 
548 # Confirm whether we really want to run this service
549 confirm() {
550   [ -x /bin/plymouth ] && /bin/plymouth --hide-splash
551   while : ; do 
552       echo -n $"Start service $1 (Y)es/(N)o/(C)ontinue? [Y] "
553       read answer
554       if strstr $"yY" "$answer" || [ "$answer" = "" ] ; then
555          return 
556       elif strstr $"cC" "$answer" ; then
557      rm -f /var/run/confirm
558      [ -x /bin/plymouth ] && /bin/plymouth --show-splash
559          return 2
560       elif strstr $"nN" "$answer" ; then
561          return 1
562       fi
563   done
564 }
565 
566 # resolve a device node to its major:minor numbers in decimal or hex
567 get_numeric_dev() {
568 (
569     fmt="%d:%d"
570     if [ "$1" == "hex" ]; then
571         fmt="%x:%x"
572     fi
573     ls -lH "$2" | awk '{ sub(/,/, "", $5); printf("'"$fmt"'", $5, $6); }'
574 ) 2>/dev/null
575 }
576 
577 # Check whether file $1 is a backup or rpm-generated file and should be ignored
578 is_ignored_file() {
579     case "$1" in
580     *~ | *.bak | *.orig | *.rpmnew | *.rpmorig | *.rpmsave)
581         return 
582         ;;
583     esac
584     return 1
585 }
586 
587 # Evaluate shvar-style booleans
588 is_true() {
589     case "$1" in
590     [tT] | [yY] | [yY][eE][sS] | [tT][rR][uU][eE])
591     return 
592     ;;
593     esac
594     return 1
595 }
596 
597 # Evaluate shvar-style booleans
598 is_false() {
599     case "$1" in
600     [fF] | [nN] | [nN][oO] | [fF][aA][lL][sS][eE])
601     return 
602     ;;
603     esac
604     return 1
605 }
606 
607 # Apply sysctl settings, including files in /etc/sysctl.d
608 apply_sysctl() {
609     sysctl -e -p /etc/sysctl.conf >/dev/null 2>&1
610     for file in /etc/sysctl.d/* ; do
611         is_ignored_file "$file" && continue
612         test -f "$file" && sysctl -e -p "$file" >/dev/null 2>&1
613     done
614 }
615 
616 key_is_random() {
617     [ "$1" = "/dev/urandom" -o "$1" = "/dev/hw_random" \
618     -o "$1" = "/dev/random" ]
619 }
620 
621 find_crypto_mount_point() {
622     local fs_spec fs_file fs_vfstype remaining_fields
623     local fs
624     while read fs_spec fs_file remaining_fields; do
625     if [ "$fs_spec" = "/dev/mapper/$1" ]; then
626         echo $fs_file
627         break;
628     fi
629     done < /etc/fstab
630 }
631 
632 # Because of a chicken/egg problem, init_crypto must be run twice.  /var may be
633 # encrypted but /var/lib/random-seed is needed to initialize swap.
634 init_crypto() {
635     local have_random dst src key opt mode owner params makeswap skip arg opt
636     local param value rc ret mke2fs mdir prompt mount_point
637 
638     ret=0
639     have_random=$1
640     while read dst src key opt; do
641     [ -z "$dst" -o "${dst#\#}" != "$dst" ] && continue
642         [ -b "/dev/mapper/$dst" ] && continue;
643     if [ "$have_random" = 0 ] && key_is_random "$key"; then
644         continue
645     fi
646     if [ -n "$key" -a "x$key" != "xnone" ]; then
647         if test -e "$key" ; then
648         owner=$(ls -l $key | (read a b owner rest; echo $owner))
649         if ! key_is_random "$key"; then
650             mode=$(ls -l "$key" | cut -c 5-10)
651             if [ "$mode" != "------" ]; then
652                echo $"INSECURE MODE FOR $key"
653             fi
654         fi
655         if [ "$owner" != root ]; then
656             echo $"INSECURE OWNER FOR $key"
657         fi
658         else
659         echo $"Key file for $dst not found, skipping"
660         ret=1
661         continue
662         fi
663     else
664         key=""
665     fi
666     params=""
667     makeswap=""
668     mke2fs=""
669     skip=""
670     # Parse the src field for UUID= and convert to real device names
671     if [ "${src%%=*}" == "UUID" ]; then
672         src=$(/sbin/blkid -t "$src" -l -o device)
673     elif [ "${src/^\/dev\/disk\/by-uuid\/}" != "$src" ]; then
674         src=$(__readlink $src)
675     fi
676     # Is it a block device?
677     [ -b "$src" ] || continue
678     # Is it already a device mapper slave? (this is gross)
679     devesc=${src##/dev/}
680     devesc=${devesc//\//!}
681     for d in /sys/block/dm-*/slaves ; do
682         [ -e $d/$devesc ] && continue 2
683     done
684     # Parse the options field, convert to cryptsetup parameters and
685     # contruct the command line
686     while [ -n "$opt" ]; do
687         arg=${opt%%,*}
688         opt=${opt##$arg}
689         opt=${opt##,}
690         param=${arg%%=*}
691         value=${arg##$param=}
692 
693         case "$param" in
694         cipher)
695         params="$params -c $value"
696         if [ -z "$value" ]; then
697             echo $"$dst: no value for cipher option, skipping"
698             skip="yes"
699         fi
700         ;;
701         size)
702         params="$params -s $value"
703         if [ -z "$value" ]; then
704             echo $"$dst: no value for size option, skipping"
705             skip="yes"
706         fi
707         ;;
708         hash)
709         params="$params -h $value"
710         if [ -z "$value" ]; then
711             echo $"$dst: no value for hash option, skipping"
712             skip="yes"
713         fi
714         ;;
715         verify)
716             params="$params -y"
717         ;;
718         swap)
719         makeswap=yes
720         ;;
721         tmp)
722         mke2fs=yes
723         esac
724     done
725     if [ "$skip" = "yes" ]; then
726         ret=1
727         continue
728     fi
729     if [ -z "$makeswap" ] && cryptsetup isLuks "$src" 2>/dev/null ; then
730         if key_is_random "$key"; then
731         echo $"$dst: LUKS requires non-random key, skipping"
732         ret=1
733         continue
734         fi
735         if [ -n "$params" ]; then
736         echo "$dst: options are invalid for LUKS partitions," \
737             "ignoring them"
738         fi
739         if [ -n "$key" ]; then
740         /sbin/cryptsetup -d $key luksOpen "$src" "$dst" <&1 2>/dev/null && success || failure
741         rc=$?
742         else
743         mount_point="$(find_crypto_mount_point $dst)"
744         [ -n "$mount_point" ] || mount_point=${src##*/}
745         prompt=$(printf $"%s is password protected" "$mount_point")
746         plymouth ask-for-password --prompt "$prompt" --command="/sbin/cryptsetup luksOpen -T1 $src $dst" <&1
747         rc=$?
748         fi
749     else
750         [ -z "$key" ] && plymouth --hide-splash
751         /sbin/cryptsetup $params ${key:+-d $key} create "$dst" "$src" <&1 2>/dev/null && success || failure
752         rc=$?
753         [ -z "$key" ] && plymouth --show-splash
754     fi
755     if [ $rc -ne  ]; then
756         ret=1
757         continue
758     fi
759     if [ -b "/dev/mapper/$dst" ]; then
760         if [ "$makeswap" = "yes" ]; then
761         mkswap "/dev/mapper/$dst" 2>/dev/null >/dev/null
762         fi
763         if [ "$mke2fs" = "yes" ]; then
764         if mke2fs "/dev/mapper/$dst" 2>/dev/null >/dev/null \
765             && mdir=$(mktemp -d /tmp/mountXXXXXX); then
766             mount "/dev/mapper/$dst" "$mdir" && chmod 1777 "$mdir"
767             umount "$mdir"
768             rmdir "$mdir"
769         fi
770         fi
771     fi
772     done < /etc/crypttab
773     return $ret
774 }
775 
776 # A sed expression to filter out the files that is_ignored_file recognizes
777 __sed_discard_ignored_files='/\(~\|\.bak\|\.orig\|\.rpmnew\|\.rpmorig\|\.rpmsave\)$/d'

View Code

相关阅读  Linux目录结构

1. portmap脚本

 1 #! /bin/sh
 2 #
 3 # portmap       Start/Stop RPC portmapper
 4 #
 5 # chkconfig: 345 13 87
 6 # description: The portmapper manages RPC connections, which are used by \
 7 #              protocols such as NFS and NIS. The portmap server must be \
 8 #              running on machines which act as servers for protocols which \
 9 #              make use of the RPC mechanism.
10 # processname: portmap
11 
12 
13 # This is an interactive program, we need the current locale
14 [ -f /etc/profile.d/lang.sh ] && . /etc/profile.d/lang.sh
15 # We can't Japanese on normal console at boot time, so force LANG=C.
16 if [ "$LANG" = "ja" -o "$LANG" = "ja_JP.eucJP" ]; then
17     if [ "$TERM" = "linux" ] ; then
18         LANG=C
19     fi
20 fi
21 
22 # Source function library.
23 . /etc/init.d/functions
24 
25 # Get config.
26 if [ -f /etc/sysconfig/network ]; then
27     . /etc/sysconfig/network
28 else
29     echo $"Networking not configured - exiting"
30 ...skipping...
31         stop
32         start
33         pmap_set < /var/run/portmap.state
34         rm -f /var/run/portmap.state
35 }
36 
37 # See how we were called.
38 case "$1" in
39   start)
40         start
41         ;;
42   stop)
43         stop
44         ;;
45   status)
46         status portmap
47         ;;
48   restart|reload)
49         restart
50         ;;
51   condrestart)
52         [ -f /var/lock/subsys/portmap ] && restart || :
53         ;;
54   *)
55         echo $"Usage: $0 {start|stop|status|restart|reload|condrestart}"
56         exit 1
57 esac

View Code

2. rc.sysinit

  1 #!/bin/bash
  2 #
  3 # /etc/rc.d/rc.sysinit - run once at boot time
  4 #
  5 # Taken in part from Miquel van Smoorenburg's bcheckrc.
  6 #
  7 
  8 HOSTNAME=$(/bin/hostname)
  9 
 10 set -m
 11 
 12 if [ -f /etc/sysconfig/network ]; then
 13     . /etc/sysconfig/network
 14 fi
 15 if [ -z "$HOSTNAME" -o "$HOSTNAME" = "(none)" ]; then
 16     HOSTNAME=localhost
 17 fi
 18 
 19 if [ ! -e /proc/mounts ]; then
 20     mount -n -t proc /proc /proc
 21     mount -n -t sysfs /sys /sys >/dev/null 2>&1
 22 fi
 23 if [ ! -d /proc/bus/usb ]; then
 24     modprobe usbcore >/dev/null 2>&1 && mount -n -t usbfs /proc/bus/usb /proc/bus/usb
 25 else
 26     mount -n -t usbfs /proc/bus/usb /proc/bus/usb
 27 fi
 28 
 29 #remount /dev/shm to set attributes from fstab #669700
 30 mount -n -o remount /dev/shm >/dev/null 2>&1
 31 
 32 . /etc/init.d/functions
 33 
 34 PLYMOUTH=
 35 [ -x /bin/plymouth ] && PLYMOUTH=yes
 36 
 37 # Check SELinux status
 38 SELINUX_STATE=
 39 if [ -e "/selinux/enforce" ] && [ "$(cat /proc/self/attr/current)" != "kernel" ]; then
 40     if [ -r "/selinux/enforce" ] ; then
 41         SELINUX_STATE=$(cat "/selinux/enforce")
 42     else
 43         # assume enforcing if you can't read it
 44         SELINUX_STATE=1
 45     fi
 46 fi
 47 
 48 if [ -n "$SELINUX_STATE" -a -x /sbin/restorecon ] && __fgrep " /dev " /proc/mounts >/dev/null 2>&1 ; then
 49     /sbin/restorecon -R -F /dev 2>/dev/null
 50 fi
 51 
 52 disable_selinux() {
 53     echo $"*** Warning -- SELinux is active"
 54     echo $"*** Disabling security enforcement for system recovery."
 55     echo $"*** Run 'setenforce 1' to reenable."
 56     echo "" > "/selinux/enforce"
 57 }
 58 
 59 relabel_selinux() {
 60     # if /sbin/init is not labeled correctly this process is running in the
 61     # wrong context, so a reboot will be required after relabel
 62     AUTORELABEL=
 63     . /etc/selinux/config
 64     echo "" > /selinux/enforce
 65     [ -n "$PLYMOUTH" ] && plymouth --hide-splash
 66 
 67     if [ "$AUTORELABEL" = "" ]; then
 68     echo
 69     echo $"*** Warning -- SELinux ${SELINUXTYPE} policy relabel is required. "
 70     echo $"*** /etc/selinux/config indicates you want to manually fix labeling"
 71     echo $"*** problems. Dropping you to a shell; the system will reboot"
 72     echo $"*** when you leave the shell."
 73     start rcS-emergency
 74 
 75     else
 76     echo
 77     echo $"*** Warning -- SELinux ${SELINUXTYPE} policy relabel is required."
 78     echo $"*** Relabeling could take a very long time, depending on file"
 79     echo $"*** system size and speed of hard drives."
 80 
 81     /sbin/fixfiles -F restore > /dev/null 2>&1
 82     fi
 83     rm -f  /.autorelabel
 84     echo $"Unmounting file systems"
 85     umount -a
 86     mount -n -o remount,ro /
 87     echo $"Automatic reboot in progress."
 88     reboot -f
 89 }
 90 
 91 # Print a text banner.
 92 echo -en $"\t\tWelcome to "
 93 read -r system_release < /etc/system-release
 94 if [[ "$system_release" == *"Red Hat"* ]]; then
 95  [ "$BOOTUP" = "color" ] && echo -en "\\033[0;31m"
 96  echo -en "Red Hat"
 97  [ "$BOOTUP" = "color" ] && echo -en "\\033[0;39m"
 98  PRODUCT=$(sed "s/Red Hat \(.*\) release.*/\1/" /etc/system-release)
 99  echo " $PRODUCT"
100 elif [[ "$system_release" == *Fedora* ]]; then
101  [ "$BOOTUP" = "color" ] && echo -en "\\033[0;34m"
102  echo -en "Fedora"
103  [ "$BOOTUP" = "color" ] && echo -en "\\033[0;39m"
104  PRODUCT=$(sed "s/Fedora \(.*\) \?release.*/\1/" /etc/system-release)
105  echo " $PRODUCT"
106 elif [[ "$system_release" =~ "CentOS" ]]; then
107  [ "$BOOTUP" = "color" ] && echo -en "\\033[0;36m"
108  echo -en "CentOS"
109  [ "$BOOTUP" = "color" ] && echo -en "\\033[0;39m"
110  PRODUCT=$(sed "s/CentOS \(.*\) \?release.*/\1/" /etc/system-release)
111  echo " $PRODUCT"
112 else
113  PRODUCT=$(sed "s/ release.*//g" /etc/system-release)
114  echo "$PRODUCT"
115 fi
116 
117 # Only read this once.
118 cmdline=$(cat /proc/cmdline)
119 
120 # Initialize hardware
121 if [ -f /proc/sys/kernel/modprobe ]; then
122    if ! strstr "$cmdline" nomodules && [ -f /proc/modules ] ; then
123        sysctl -w kernel.modprobe="/sbin/modprobe" >/dev/null 2>&1
124    else
125        # We used to set this to NULL, but that causes 'failed to exec' messages"
126        sysctl -w kernel.modprobe="/bin/true" >/dev/null 2>&1
127    fi
128 fi
129 
130 touch /dev/.in_sysinit >/dev/null 2>&1
131 
132 # Set default affinity
133 if [ -x /bin/taskset ]; then
134    if strstr "$cmdline" default_affinity= ; then
135      for arg in $cmdline ; do
136          if [ "${arg##default_affinity=}" != "${arg}" ]; then
137              /bin/taskset -p ${arg##default_affinity=} 1
138          fi
139      done
140    fi
141 fi
142 
143 nashpid=$(pidof nash 2>/dev/null)
144 [ -n "$nashpid" ] && kill $nashpid >/dev/null 2>&1
145 unset nashpid
146 /sbin/start_udev
147 
148 # Load other user-defined modules
149 for file in /etc/sysconfig/modules/*.modules ; do
150   [ -x $file ] && $file
151 done
152 
153 # Load modules (for backward compatibility with VARs)
154 if [ -f /etc/rc.modules ]; then
155     /etc/rc.modules
156 fi
157 
158 mount -n /dev/pts >/dev/null 2>&1
159 [ -n "$SELINUX_STATE" ] && restorecon -F /dev/pts >/dev/null 2>&1
160 
161 # Configure kernel parameters
162 update_boot_stage RCkernelparam
163 apply_sysctl
164 
165 # Set the hostname.
166 update_boot_stage RChostname
167 action $"Setting hostname ${HOSTNAME}: " hostname ${HOSTNAME}
168 [ -n "${NISDOMAIN}" ] && domainname ${NISDOMAIN}
169 
170 # Sync waiting for storage.
171 { rmmod scsi_wait_scan ; modprobe scsi_wait_scan ; rmmod scsi_wait_scan ; } >/dev/null 2>&1
172 
173 # Device mapper & related initialization
174 if ! __fgrep "device-mapper" /proc/devices >/dev/null 2>&1 ; then
175        modprobe dm-mod >/dev/null 2>&1
176 fi
177 
178 if [ -f /etc/crypttab ]; then
179     init_crypto 0
180 fi
181 
182 if ! strstr "$cmdline" nompath && [ -f /etc/multipath.conf -a \
183         -x /sbin/multipath ]; then
184     modprobe dm-multipath > /dev/null 2>&1
185     /sbin/multipath -v 0
186     if [ -x /sbin/kpartx ]; then
187         /sbin/dmsetup ls --target multipath --exec "/sbin/kpartx -a -p p" >/dev/null
188     fi
189 fi
190 
191 if ! strstr "$cmdline" nodmraid && [ -x /sbin/dmraid ]; then
192     modprobe dm-mirror >/dev/null 2>&1
193     dmraidsets=$(LC_ALL=C /sbin/dmraid -s -c -i)
194     if [ "$?" = "0" ]; then
195         for dmname in $dmraidsets; do
196             if [[ "$dmname" == isw_* ]] && \
197                ! strstr "$cmdline" noiswmd; then
198                 continue
199             fi
200             /sbin/dmraid -ay -i --rm_partitions -p "$dmname" >/dev/null 2>&1
201             /sbin/kpartx -a -p p "/dev/mapper/$dmname"
202         done
203     fi
204 fi
205 
206 # Start any MD RAID arrays that haven't been started yet
207 [ -r /proc/mdstat -a -r /dev/md/md-device-map ] && /sbin/mdadm -IRs
208 
209 if [ -x /sbin/lvm ]; then
210     action $"Setting up Logical Volume Management:" /sbin/lvm vgchange -a ay --sysinit
211 fi
212 
213 if [ -f /etc/crypttab ]; then
214     init_crypto 0
215 fi
216 
217 if [ -f /fastboot ] || strstr "$cmdline" fastboot ; then
218     fastboot=yes
219 fi
220 
221 if [ -f /fsckoptions ]; then
222     fsckoptions=$(cat /fsckoptions)
223 fi
224 
225 if [ -f /forcefsck ] || strstr "$cmdline" forcefsck ; then
226     fsckoptions="-f $fsckoptions"
227 elif [ -f /.autofsck ]; then
228     [ -f /etc/sysconfig/autofsck ] && . /etc/sysconfig/autofsck
229     if [ "$AUTOFSCK_DEF_CHECK" = "yes" ]; then
230         AUTOFSCK_OPT="$AUTOFSCK_OPT -f"
231     fi
232     if [ -n "$AUTOFSCK_SINGLEUSER" ]; then
233         [ -n "$PLYMOUTH" ] && plymouth --hide-splash
234         echo
235         echo $"*** Warning -- the system did not shut down cleanly. "
236         echo $"*** Dropping you to a shell; the system will continue"
237         echo $"*** when you leave the shell."
238         [ -n "$SELINUX_STATE" ] && echo "0" > /selinux/enforce
239         start rcS-emergency
240         [ -n "$SELINUX_STATE" ] && echo "1" > /selinux/enforce
241         [ -n "$PLYMOUTH" ] && plymouth --show-splash
242     fi
243     fsckoptions="$AUTOFSCK_OPT $fsckoptions"
244 fi
245 
246 if [ "$BOOTUP" = "color" ]; then
247     fsckoptions="-C $fsckoptions"
248 else
249     fsckoptions="-V $fsckoptions"
250 fi
251 
252 READONLY=
253 if [ -f /etc/sysconfig/readonly-root ]; then
254     . /etc/sysconfig/readonly-root
255 fi
256 if strstr "$cmdline" readonlyroot ; then
257     READONLY=yes
258     [ -z "$RW_MOUNT" ] && RW_MOUNT=/var/lib/stateless/writable
259     [ -z "$STATE_MOUNT" ] && STATE_MOUNT=/var/lib/stateless/state
260 fi
261 if strstr "$cmdline" noreadonlyroot ; then
262     READONLY=no
263 fi
264 
265 if [ "$READONLY" = "yes" -o "$TEMPORARY_STATE" = "yes" ]; then
266 
267     mount_empty() {
268         if [ -e "$1" ]; then
269             echo "$1" | cpio -p -vd "$RW_MOUNT" &>/dev/null
270             mount -n --bind "$RW_MOUNT$1" "$1"
271         fi
272     }
273 
274     mount_dirs() {
275         if [ -e "$1" ]; then
276             mkdir -p "$RW_MOUNT$1"
277             find "$1" -type d -print0 | cpio -p -0vd "$RW_MOUNT" &>/dev/null
278             mount -n --bind "$RW_MOUNT$1" "$1"
279         fi
280     }
281 
282     mount_files() {
283         if [ -e "$1" ]; then
284             cp -a --parents "$1" "$RW_MOUNT"
285             mount -n --bind "$RW_MOUNT$1" "$1"
286         fi
287     }
288 
289     # Common mount options for scratch space regardless of
290     # type of backing store
291     mountopts=
292 
293     # Scan partitions for local scratch storage
294     rw_mount_dev=$(blkid -t LABEL="$RW_LABEL" -l -o device)
295 
296     # First try to mount scratch storage from /etc/fstab, then any
297     # partition with the proper label.  If either succeeds, be sure
298     # to wipe the scratch storage clean.  If both fail, then mount
299     # scratch storage via tmpfs.
300     if mount $mountopts "$RW_MOUNT" > /dev/null 2>&1 ; then
301         rm -rf "$RW_MOUNT" > /dev/null 2>&1
302     elif [ x$rw_mount_dev != x ] && mount $rw_mount_dev $mountopts "$RW_MOUNT" > /dev/null 2>&1; then
303         rm -rf "$RW_MOUNT"  > /dev/null 2>&1
304     else
305         mount -n -t tmpfs $RW_OPTIONS $mountopts none "$RW_MOUNT"
306     fi
307 
308     for file in /etc/rwtab /etc/rwtab.d/* /dev/.initramfs/rwtab ; do
309         is_ignored_file "$file" && continue
310     [ -f $file ] && cat $file | while read type path ; do
311             case "$type" in
312                 empty)
313                     mount_empty $path
314                     ;;
315                 files)
316                     mount_files $path
317                     ;;
318                 dirs)
319                     mount_dirs $path
320                     ;;
321                 *)
322                     ;;
323             esac
324             [ -n "$SELINUX_STATE" -a -e "$path" ] && restorecon -R "$path"
325         done
326     done
327 
328     # Use any state passed by initramfs
329     [ -d /dev/.initramfs/state ] && cp -a /dev/.initramfs/state/* $RW_MOUNT
330 
331     # In theory there should be no more than one network interface active
332     # this early in the boot process -- the one we're booting from.
333     # Use the network address to set the hostname of the client.  This
334     # must be done even if we have local storage.
335     ipaddr=
336     if [ "$HOSTNAME" = "localhost" -o "$HOSTNAME" = "localhost.localdomain" ]; then
337         ipaddr=$(ip addr show to 0.0.0.0/0 scope global | awk '/[[:space:]]inet / { print gensub("/.*","","g",$2) }')
338         for ip in $ipaddr ; do
339             HOSTNAME=
340             eval $(ipcalc -h $ip 2>/dev/null)
341             [ -n "$HOSTNAME" ] && { hostname ${HOSTNAME} ; break; }
342         done
343     fi
344     
345     # Clients with read-only root filesystems may be provided with a
346     # place where they can place minimal amounts of persistent
347     # state.  SSH keys or puppet certificates for example.
348     #
349     # Ideally we'll use puppet to manage the state directory and to
350     # create the bind mounts.  However, until that's all ready this
351     # is sufficient to build a working system.
352 
353     # First try to mount persistent data from /etc/fstab, then any
354     # partition with the proper label, then fallback to NFS
355     state_mount_dev=$(blkid -t LABEL="$STATE_LABEL" -l -o device)
356     if mount $mountopts $STATE_OPTIONS "$STATE_MOUNT" > /dev/null 2>&1 ; then
357         /bin/true
358     elif [ x$state_mount_dev != x ] && mount $state_mount_dev $mountopts "$STATE_MOUNT" > /dev/null 2>&1;  then
359         /bin/true
360     elif [ ! -z "$CLIENTSTATE" ]; then
361         # No local storage was found.  Make a final attempt to find
362         # state on an NFS server.
363 
364         mount -t nfs $CLIENTSTATE/$HOSTNAME $STATE_MOUNT -o rw,nolock
365     fi
366 
367     if [ -w "$STATE_MOUNT" ]; then
368 
369         mount_state() {
370             if [ -e "$1" ]; then
371                 [ ! -e "$STATE_MOUNT$1" ] && cp -a --parents "$1" "$STATE_MOUNT"
372                 mount -n --bind "$STATE_MOUNT$1" "$1"
373             fi
374         }
375 
376         for file in /etc/statetab /etc/statetab.d/* ; do
377             is_ignored_file "$file" && continue
378             [ ! -f "$file" ] && continue
379 
380             if [ -f "$STATE_MOUNT/$file" ] ; then
381                 mount -n --bind "$STATE_MOUNT/$file" "$file"
382             fi
383 
384             for path in $(grep -v "^#" "$file" 2>/dev/null); do
385                 mount_state "$path"
386                 [ -n "$SELINUX_STATE" -a -e "$path" ] && restorecon -R "$path"
387             done
388         done
389 
390         if [ -f "$STATE_MOUNT/files" ] ; then
391             for path in $(grep -v "^#" "$STATE_MOUNT/files" 2>/dev/null); do
392                 mount_state "$path"
393                 [ -n "$SELINUX_STATE" -a -e "$path" ] && restorecon -R "$path"
394             done
395         fi
396     fi
397 fi
398 
399 if [[ " $fsckoptions" != *" -y"* ]]; then
400     fsckoptions="-a $fsckoptions"
401 fi
402 
403 _RUN_QUOTACHECK=0
404 if [ -f /forcequotacheck ] || strstr "$cmdline" forcequotacheck ; then
405     _RUN_QUOTACHECK=1
406 fi
407 if [ -z "$fastboot" -a "$READONLY" != "yes" ]; then
408 
409         STRING=$"Checking filesystems"
410     echo $STRING
411     fsck -T -t noopts=_netdev -A $fsckoptions
412     rc=$?
413     
414     if [ "$rc" -eq "0" ]; then
415         success "$STRING"
416         echo
417     elif [ "$rc" -eq "1" ]; then
418             passed "$STRING"
419         echo
420     elif [ "$rc" -eq "2" -o "$rc" -eq "3" ]; then
421         echo $"Unmounting file systems"
422         umount -a
423         mount -n -o remount,ro /
424         echo $"Automatic reboot in progress."
425         reboot -f
426         fi
427     
428         # A return of 4 or higher means there were serious problems.
429     if [ $rc -gt 1 ]; then
430         [ -n "$PLYMOUTH" ] && plymouth --hide-splash
431 
432         failure "$STRING"
433         echo
434         echo
435         echo $"*** An error occurred during the file system check."
436         echo $"*** Dropping you to a shell; the system will reboot"
437         echo $"*** when you leave the shell."
438 
439                 str=$"(Repair filesystem)"
440         PS1="$str \# # "; export PS1
441         [ "$SELINUX_STATE" = "1" ] && disable_selinux
442         start rcS-emergency
443 
444         echo $"Unmounting file systems"
445         umount -a
446         mount -n -o remount,ro /
447         echo $"Automatic reboot in progress."
448         reboot -f
449     elif [ "$rc" -eq "1" ]; then
450         _RUN_QUOTACHECK=1
451     fi
452 fi
453 
454 remount_needed() {
455   local state oldifs
456   [ "$READONLY" = "yes" ] && return 1
457   state=$(LC_ALL=C awk '/ \/ / && ($3 !~ /rootfs/) { print $4 }' /proc/mounts)
458   oldifs=$IFS
459   IFS=","
460   for opt in $state ; do
461     if [ "$opt" = "rw" ]; then
462         IFS=$oldifs
463         return 1
464     fi
465   done
466   IFS=$oldifs
467   return 0
468 }
469 
470 # Remount the root filesystem read-write.
471 update_boot_stage RCmountfs
472 if remount_needed ; then
473   action $"Remounting root filesystem in read-write mode: " mount -n -o remount,rw /
474 fi
475 
476 # Clean up SELinux labels
477 if [ -n "$SELINUX_STATE" ]; then
478    restorecon /etc/mtab /etc/ld.so.cache /etc/blkid/blkid.tab /etc/resolv.conf >/dev/null 2>&1
479 fi
480 
481 # If relabeling, relabel mount points.
482 if [ -n "$SELINUX_STATE" -a "$READONLY" != "yes" ]; then
483     if [ -f /.autorelabel ] || strstr "$cmdline" autorelabel ; then
484     restorecon $(awk '!/^#/ && $4 !~ /noauto/ && $2 ~ /^\// { print $2 }' /etc/fstab) >/dev/null 2>&1
485     fi
486 fi
487 
488 if [ "$READONLY" != "yes" ] ; then
489     # Clear mtab
490     (> /etc/mtab) &> /dev/null
491 
492     # Remove stale backups
493     rm -f /etc/mtab~ /etc/mtab~~
494 
495     # Enter mounted filesystems into /etc/mtab
496     mount -f /
497     mount -f /proc >/dev/null 2>&1
498     mount -f /sys >/dev/null 2>&1
499     mount -f /dev/pts >/dev/null 2>&1
500     mount -f /dev/shm >/dev/null 2>&1
501     mount -f /proc/bus/usb >/dev/null 2>&1
502 fi
503 
504 # Mount all other filesystems (except for NFS and /proc, which is already
505 # mounted). Contrary to standard usage,
506 # filesystems are NOT unmounted in single user mode.
507 # The 'no' applies to all listed filesystem types. See mount(8).
508 if [ "$READONLY" != "yes" ] ; then
509     action $"Mounting local filesystems: " mount -a -t nonfs,nfs4,smbfs,ncpfs,cifs,gfs,gfs2 -O no_netdev
510 else
511     action $"Mounting local filesystems: " mount -a -n -t nonfs,nfs4,smbfs,ncpfs,cifs,gfs,gfs2 -O no_netdev
512 fi
513 
514 # Update quotas if necessary
515 if [ X"$_RUN_QUOTACHECK" = X1 -a -x /sbin/quotacheck ]; then
516     action $"Checking local filesystem quotas: " /sbin/quotacheck -anug
517 fi
518 
519 if [ -x /sbin/quotaon ]; then
520     action $"Enabling local filesystem quotas: " /sbin/quotaon -aug
521 fi
522 
523 # Check to see if a full relabel is needed
524 if [ -n "$SELINUX_STATE" -a "$READONLY" != "yes" ]; then
525     if [ -f /.autorelabel ] || strstr "$cmdline" autorelabel ; then
526     relabel_selinux
527     fi
528 else
529     if [ -d /etc/selinux -a "$READONLY" != "yes" ]; then
530         [ -f /.autorelabel ] || touch /.autorelabel
531     fi
532 fi
533 
534 # Initialize pseudo-random number generator
535 if [ -f "/var/lib/random-seed" ]; then
536     cat /var/lib/random-seed > /dev/urandom
537 else
538     [ "$READONLY" != "yes" ] && touch /var/lib/random-seed
539 fi
540 if [ "$READONLY" != "yes" ]; then
541     chmod 600 /var/lib/random-seed
542     dd if=/dev/urandom of=/var/lib/random-seed count=1 bs=512 2>/dev/null
543 fi
544 
545 if [ -f /etc/crypttab ]; then
546     init_crypto 1
547 fi
548 
549 # Configure machine if necessary.
550 if [ -f /.unconfigured ]; then
551 
552     if [ -x /bin/plymouth ]; then
553         /bin/plymouth quit
554     fi
555 
556     if [ -x /usr/bin/system-config-keyboard ]; then
557     /usr/bin/system-config-keyboard
558     fi
559     if [ -x /usr/bin/passwd ]; then
560         /usr/bin/passwd root
561     fi
562     if [ -x /usr/sbin/system-config-network-tui ]; then
563     /usr/sbin/system-config-network-tui
564     fi
565     if [ -x /usr/sbin/timeconfig ]; then
566     /usr/sbin/timeconfig
567     fi
568     if [ -x /usr/sbin/authconfig-tui ]; then
569     /usr/sbin/authconfig-tui --nostart
570     fi
571     if [ -x /usr/sbin/ntsysv ]; then
572     /usr/sbin/ntsysv --level 35
573     fi
574 
575     # Reread in network configuration data.
576     if [ -f /etc/sysconfig/network ]; then
577     . /etc/sysconfig/network
578 
579     # Reset the hostname.
580     action $"Resetting hostname ${HOSTNAME}: " hostname ${HOSTNAME}
581     fi
582 
583     rm -f /.unconfigured
584 fi
585 
586 # Clean out /.
587 rm -f /fastboot /fsckoptions /forcefsck /.autofsck /forcequotacheck /halt \
588     /poweroff /.suspended &> /dev/null
589 
590 # Do we need (w|u)tmpx files? We don't set them up, but the sysadmin might...
591 _NEED_XFILES=
592 [ -f /var/run/utmpx -o -f /var/log/wtmpx ] && _NEED_XFILES=1
593 
594 # Clean up /var.
595 rm -rf /var/lock/cvs/* /var/run/screen/*
596 find /var/lock /var/run ! -type d -exec rm -f {} \;
597 rm -f /var/lib/rpm/__db* &> /dev/null
598 rm -f /var/gdm/.gdmfifo &> /dev/null
599 
600 [ "$PROMPT" != no ] && plymouth watch-keystroke --command "touch /var/run/confirm" --keys=Ii &
601 
602 # Clean up utmp/wtmp
603 > /var/run/utmp
604 touch /var/log/wtmp
605 chgrp utmp /var/run/utmp /var/log/wtmp
606 chmod 0664 /var/run/utmp /var/log/wtmp
607 if [ -n "$_NEED_XFILES" ]; then
608   > /var/run/utmpx
609   touch /var/log/wtmpx
610   chgrp utmp /var/run/utmpx /var/log/wtmpx
611   chmod 0664 /var/run/utmpx /var/log/wtmpx
612 fi
613 [ -n "$SELINUX_STATE" ] && restorecon /var/run/utmp* /var/log/wtmp* >/dev/null 2>&1
614 
615 # Clean up various /tmp bits
616 [ -n "$SELINUX_STATE" ] && restorecon /tmp
617 rm -f /tmp/.X*-lock /tmp/.lock.* /tmp/.gdm_socket /tmp/.s.PGSQL.*
618 rm -rf /tmp/.X*-unix /tmp/.ICE-unix /tmp/.font-unix /tmp/hsperfdata_* \
619        /tmp/kde-* /tmp/ksocket-* /tmp/mc-* /tmp/mcop-* /tmp/orbit-*  \
620        /tmp/scrollkeeper-*  /tmp/ssh-* \
621        /dev/.in_sysinit
622 
623 # Make ICE directory
624 mkdir -m 1777 -p /tmp/.ICE-unix >/dev/null 2>&1
625 chown root:root /tmp/.ICE-unix
626 [ -n "$SELINUX_STATE" ] && restorecon /tmp/.ICE-unix >/dev/null 2>&1
627 
628 # Start up swapping.
629 update_boot_stage RCswap
630 action $"Enabling /etc/fstab swaps: " swapon -a -e
631 if [ "$AUTOSWAP" = "yes" ]; then
632     curswap=$(awk '/^\/dev/ { print $1 }' /proc/swaps | while read x; do get_numeric_dev dec $x ; echo -n " "; done)
633     swappartitions=$(blkid -t TYPE=swap -o device)
634     if [ x"$swappartitions" != x ]; then
635         for partition in $swappartitions ; do
636             [ ! -e $partition ] && continue
637             majmin=$(get_numeric_dev dec $partition)
638             echo $curswap | grep -qw "$majmin" || action $"Enabling local swap partitions: " swapon $partition
639         done
640     fi
641 fi
642 
643 # Set up binfmt_misc
644 /bin/mount -t binfmt_misc none /proc/sys/fs/binfmt_misc > /dev/null 2>&1
645 
646 # Boot time profiles. Yes, this should be somewhere else.
647 if [ -x /usr/sbin/system-config-network-cmd ]; then
648   if strstr "$cmdline" netprofile= ; then
649     for arg in $cmdline ; do
650         if [ "${arg##netprofile=}" != "${arg}" ]; then
651         /usr/sbin/system-config-network-cmd --profile ${arg##netprofile=}
652         fi
653     done
654   fi
655 fi
656 
657 # Now that we have all of our basic modules loaded and the kernel going,
658 # let's dump the syslog ring somewhere so we can find it later
659 [ -f /var/log/dmesg ] && mv -f /var/log/dmesg /var/log/dmesg.old
660 dmesg -s 131072 > /var/log/dmesg
661 
662 # create the crash indicator flag to warn on crashes, offer fsck with timeout
663 touch /.autofsck &> /dev/null
664 
665 [ "$PROMPT" != no ] && plymouth --ignore-keystroke=Ii
666 if strstr "$cmdline" confirm ; then
667     touch /var/run/confirm
668 fi
669 
670 # Let rhgb know that we're leaving rc.sysinit
671 if [ -x /bin/plymouth ]; then
672     /bin/plymouth --sysinit
673 fi

View Code

相关阅读  Linux xargs命令详解

  

 FLT的DEMO

0. 一键式[未完成版本]

  1 #set env
  2 export PATH=$PATH:/bin:/sbin:/usr/sbin
  3 export LANG='us'
  4 
  5 #Root allowed
  6 if [ `whoami` != 'root' ];then
  7   echo "Please run this script with root " 
  8   exit 1
  9 fi
 10 
 11 #define cmd var
 12 SERVICE=`which service`
 13 CHKCONFIG= `which chkconfig`
 14 
 15 #import libiary
 16 . /etc/init.d/functions
 17 
 18 #Config Yum Config
 19 function yum(){
 20   echo "Config Yum Centos-Base.repo"
 21   cd /etc/yum.repos.d/
 22   cp rhel-source.repo rhel-source.repo.$(date +%F)
 23   ping www.baidu.com
 24   [ $? -eq  ] && echo $"Networking not configured" && exit 1
 25   wget --quiet http://mirrors.163.com/.help/CentOS6-Base-163.repo
 26   sed -i 's/$releasever/6/g' CentOS6-Base-163.repo 
 27   chmod 644 CentOS6-Base-163.repo
 28   chown root.root CentOS6-Base-163.repo
 29 }
 30 
 31 #Install Init Package
 32 function installTool(){
 33   echo "sysstat ntp net-snmp lrzsz rsync"
 34   yum install sysstat ntp net-snmp lrzsz rsync 2>&/dev/null
 35 }
 36 
 37 #Chinese GB18030
 38 function initI18n(){
 39   echo "#set LANG="zh_cn.gb18030""
 40   cp /etc/sysconfig/i18n /etc/sysconfig/i18n_`date +%F`
 41   sed -i 's/LANG="en_US.UTF-8"/LANG="zh_CN.GB18030"/g' /etc/sysconfig/i18n
 42   grep LANG /etc/sysconfig/i18n
 43   sleep 1
 44 }
 45 
 46 #close selinux and iptables
 47 initFirewall(){
 48   echo "#close selinux and firewall"
 49   cp  /etc/selinux/config   /etc/selinux/config_`date +%F`
 50   /etc/init.d/iptables stop
 51   sed -i 's/SELINUX=enable/SELINUX=disable/g'  /etc/selinux/config 
 52   setenforce  
 53   /etc/init.d/iptables status
 54   grep SELINUX=disable  /etc/selinux/config 
 55   echo "Close selinux        Ok "
 56   echo "Close firewall       Ok "
 57   sleep 1
 58  }
 59 
 60 #Init Auto Startup Service
 61 function initService(){
 62   echo "Close Nonuseful service..."
 63   exprt LANG=us
 64   chkconfig |grep 3:on | awk '{print $1}' | grep -Ev "sshd|network|crond|sysstat|rsyslog" | xargs -I{} chkconfig {} off
 65   echo "Service sshd|network|crond|sysstat|rsyslog is Running...."
 66   sleep 1
 67 }
 68 
 69 #Init ssh
 70 function ssh(){
 71   echo "config sshConfig ...."
 72   cp /etc/ssh/sshd_config /etc/ssh/sshd_config_`date +%F`
 73   sed -i 's#GSSAPIAuthentication yes#GSSAPIAuthentication no#g' /etc/ssh/sshd_config
 74   sed -i 's#PermitRootLogin no#PermitRootLogin no#g' /etc/ssh/sshd_config
 75   sed -i 's%#Port 22%Port 11544%g' /etc/ssh/sshd_config
 76 }
 77 
 78 #AddUser
 79 function addUser(){
 80   echo "add User for Linux System..."
 81   cp /etc/sudoers /etc/sudoers_`date +%F`
 82   saUserArr={omc webserver webserverpt}
 83   groupadd -g 888 sa
 84   for((i=;i<${#saUserArr[@]};i++))
 85   do
 86     useradd -g sa -u88${i} ${saUserArr[$i]}
 87     echo "${saUserArr[$i]}123"|passwd ${saUserArr[$i]} --stdin
 88     # add sudoers 
 89     # ...
 90     # /usr/sbin/visudo -c
 91     # [ $? -ne  ] && /bin/cp /etc/sudoers.`date +%F` /etc/sudoers && echo $"Sudoers not configured --exit" && exit 1
 92     # action $"useradd is ok "   /bin/true
 93   done
 94 }
 95 
 96 #Sync Time
 97 function sysncTime(){
 98   if [ `grep pool.ntp.ort /var/spool/cron/root|grep -v grep |wc -l` -lt 1 ];then
 99     echo "*/5 * * * * /usr/sbin/ntpdate cn.pool.ntp.org 2&>/dev/null"  >> /var/spool/cron/root
100   fi
101 }
102 
103 #adjuct File
104 function openFile(){
105   echo "adjust the max opened files are 65535"
106   cp /etc/security/limits.conf /etc/security/limits.conf_`date +%F`
107   echo '  *           -      nofile   65535' >> /etc/security/limits.conf
108   ulimit -SHn 65535 
109   echo "adjust the max opened files are 65535 is ok "
110   sleep 1
111 }
112 
113 #adjust kernal
114 function optimizationKernal(){
115   echo "optimizationKernal..."
116   cp /etc/sysctl.conf  /etc/sysctl.conf_`date +%F`
117   cat >> /etc/sysctl.conf<<EOF
118   net.ipv4.tcp_timestamps=
119 EOF
120   /sbin/sysctl -p && action "optimizationKernal is ok " /bin/true || actio "optimizationKernal is wrong" /bin/false
121 
122 }
123 
124 function safe(){
125   echo ""
126 }

View Code

相关阅读  Linux ss命令详解

1. 清除日志 

 1 #!/bin/sh
 2 #clear log file
 3 LOG_DIR=/var/log
 4 ROOT_UID=
 5 #ROOT用户执行
 6 if [ "$UID" -ne ROOT_UID ]
 7    then
 8    echo 'Must be root to run this script'
 9    exit 1
10 fi
11 cd $LOG_DIR ||{
12    echo "Cannot change to $LOG_DIR " >/dev/null
13    exit 1
14 }
15 cat /dev/null > messages
16 echo "Logs cleaned up"
17 exit 

View Code

2. 利用shell数组函数检查多个url地址的案例

#!/bin/sh
#use array by 20170911

#use function
. /etc/init.d/functions 

array=(
  www.baidu.com
  www.hao123.com
  www.51cto.com
  )

function wait(){
  echo -n "3mins to start the script..."
  for((i=;i<${#array[*]};i++))
  do
    echo -n '.';
    sleep 1
  done
}

function check_url(){
  for ((i=;i<${#array[*]};i++))
  do
     judge=(`curl -I ${array[$i]} -s |head -1`)
     #echo "${array[$i]}   ------------> ${judge[2]}"
     if [ "${judge[1]}"=="200" ] &&  [ "${judge[2]}"=="OK" ];then
        action "${array[$i]}   ------------> ${judge[2]}"   /bin/true
     else
        action "${array[$i]}   ------------> ${judge[2]}"   /bin/false
     fi
  done
}
wait
echo -e "\n"
check_url

View Code

3. 数组的学习

 1 #!/bin/sh
 2 #use array by 20170911
 3 array=(
 4     hello
 5     world
 6     2017
 7     I 
 8     hava 
 9     a 
10     dream)
11 arr=(`ls /home/omc/*.sh`)
12 echo "---------------Array---------------------"
13 for ((i=0;i<=${#array[*]};i++))
14 do
15   echo "this is $i-------------------->${array[$i]}"
16 done
17   echo "------------------------------------"
18   echo "total : ${#array[*]}"
19 echo "---------------Ls *.sh--------------------"
20 for((i=0;i<${#arr[*]};i++))
21 do
22   echo "this is $i -------------------> ${arr[$i]}"
23 done
24   echo "------------------------------------"
25   echo "total : ${#arr[*]}"

View Code

4. 监控WEB的URL

 1 [root@lnmp01 scripts]# cat check_web.sh 
 2 #!/bin/sh
 3 ########################################################
 4 RETVAL=
 5 SCRIPT_PATH="/root/scripts"
 6 MAIL_GROUP="623799533@qq.com 623799531@qq.com"
 7 LOG_FILE="/tmp/web_check.log"
 8 FAIL_COUNT=
 9 function getUrlState(){
10   for (( i = ; i < 10; i++ )); do
11     wget -T 10 --tries=1 --spider http://${URL} &>/dev/null
12     [ $? -ne  ] && let ${FAIL_COUNT}+=1 
13   done  
14 
15 if [ ${FAIL_COUNT} -gt 1 ];then
16     RETVAL=1
17     NowTime=`date +%m-%d %H:%M:%S`
18     TITLE="http://${URL} sevice is error,${NowTime}"
19     echo "send to :${MAIL_USER},Title :${TITLE}" >>${LOG_FILE}
20     for MAIL_USER in `$MAIL_GROUP`
21     do
22       mail -s ${TITLE}  ${MAIL_USER} <${LOG_FILE}
23     done
24 else
25   RETVAL=
26 fi
27 return "$RETVAL"
28 }
29 
30 [ ! -d "$SCRIPT_PATH" ] && {
31   mkdir -p "$SCRIPT_PATH"
32 }
33 
34 
35  [ ! -f "$SCRIPT_PATH/domain.list" ] && {
36    cat > "$SCRIPT_PATH/domain.list" << EOF
37      www.baidu.com
38      www.51cto.com
39      www.http:www.hao123.com
40 EOF
41  }
42   
43 for URL in `cat $SCRIPT_PATH/domain.list`
44 do
45   echo -n "checking $URL..."
46   getUrlState $URL && echo OK || echo no
47 done
48 [root@lnmp01 scripts]# 

View Code

5. for循环的使用

 1 方案一:计算某个access_log文件的访问总次数:
 2 #!/bin/sh
 3 num=`awk '{print $8}' $1 |grep -v eth0|awk -F '.' '{print $4}'`
 4 sum=
 5 for line in $num
 6 do
 7   [ -n $line ] || continue
 8   ((sum+=$line))
 9 done
10 echo "Num is $sum"
11 
12 
13 问题二:打印文件夹
14 ls -F|grep /
15 
16 问题三:打印文件夹
17 #!/bin/sh
18 openvpn=""
19 openvpn_locations="/usr/bin/openvpn /usr/local/sbin/openvpn"
20 for location in $openvpn_locations
21 do
22     [ -f $location ] && openvpn=$location 
23 done
24 
25 
26 问题四:打印9*9
27 
28 #!/bin/sh
29 for a in `seq 1 9`
30 do
31     for b in `seq 1 9 `
32         do
33            if [ $a -ge $b ];then
34             echo -en "$a * $b = $(expr $a \* $b)"
35            fi
36         done
37 echo " "
38 done
39 
40 问题5:编写连续IP的添加
41 #!/bin/sh
42 
43 print_usage(){
44   echo "USAGE: $0 {up/down}"
45   exit 1
46 }
47 
48 [ $# -ne 1 ] && print_usage
49 
50 ip_conf(){
51   for((i=1;i<=16;i++))
52   do
53    if [ $i -ne 10 ];then
54       ifconfig eth0:$i 192.168.25.$i netmask 255.255.255.0 $1
55   else
56     continue
57   fi
58 done
59 }
60 
61 case $1 in 
62   up)
63     ip_conf;;
64   down)
65     ip_conf;;
66   *)
67     echo "something wrong..."
68 esac

View Code

6. while循环的使用

 1 ------------------------------------------------------------------------------------------
 2 方案一:
 3 #!/bin/sh
 4 #cal 1 + 2 + 3 +...+100
 5 i=10
 6 while ((i>))
 7 do
 8   echo $i
 9   ((i--))
10 done
11 ------------------------------------------------------------------------------------------
12 方案二:
13 #!/bin/sh
14 #cal 1 + 2 + 3 +...+100
15 i=10
16 while [[ $i > ]]
17 do
18   echo $i
19   ((i--))
20 done
21 
22 ------------------------------------------------------------------------------------------
23 方案三:
24 #!/bin/sh
25 #cal 1 + 2 + 3 +...+100
26 i=10
27 while ((i--))
28 do
29   echo $i
30 done
31 
32 
33 ------------------------------------------------------------------------------------------
34 方案四:
35 #!/bin/sh
36 #cal 1 + 2 + 3 +...+100
37 i=10
38 while [ $i -gt ]
39 do
40   echo $i
41   ((i--))
42 done

View Code

7. 计算1+2+3+…+100

 1 方案1:for循环结构及(())计算式shell脚本
 2 #!/bin/sh
 3 #cal 1 + 2 + 3 +...+100
 4 j=
 5 for ((i=;i<=100;i++))
 6 do
 7   ((j+=i))
 8 done
 9 
10 echo "1 + 2 + 3 +...+100="$j
11 
12 ---------------------------------------------------------------------------------------
13 方案二:使用seq命令加for循环语法及let命令计算式脚本
14 #!/bin/sh
15 #cal 1 + 2 + 3 +...+100
16 sum=
17 for i in `seq 100`
18 do
19   let sum+=i;
20 done
21 echo "1 + 2 + 3 +...+100="$sum    
22 
23 ---------------------------------------------------------------------------------------
24 方案三:seqtrsed、bc联手完成计算的方法
25  seq 100 | tr '\n' '+'|sed 's#\+$#\n#g'|bc    ==>拼接的字符串表达式结尾加号替换为换行(回车)符。
26 ---------------------------------------------------------------------------------------
27 方案四:
28 #!/bin/sh
29 i=1
30 while ((i <=100 ))
31 do
32  ((j=j+i))
33  ((i++))
34 done
35 echo $j
36 
37 ---------------------------------------------------------------------------------------
38 方案五:
39 seq 100 |awk '{total+=$1} END {print total}'

View Code

8. case语句联系

 1 案例一: 纯case联系
 2 #!/bin/sh
 3 read -p "Please input the number of two:" num
 4 case $num in 
 5   "1" )
 6    echo "the number you put is 1" ;;
 7   "2")
 8    echo "the number you put is 2";;
 9   [3-9])
10    echo "the number you put is $num";;
11   *)
12     echo "something must be wrong ...";
13 esac
14 
15 
16 案例二:case-if联系
17 #!/bin/sh
18 read -p "Please input the number of two:" num
19 if [ $num -eq 1 ];then
20     echo "1"
21   elif [ $num -eq 2 ];then
22     echo "2"
23   elif [ $num -eq 3 ];then
24     echo "3"
25 else 
26   echo "$num"    
27 fi
28 
29 案例三:
30 #/bin/sh
31 read -p "Please input the number of two:" fruit
32 case "$fruit" in 
33     apple|APPLE)
34         echo -e "Apple";;

View Code

8.1 if语句

 1 #!/bin/sh
 2 #Author: ftl
 3 #Date: 20170908
 4 
 5 print_usage(){
 6     printf "please input 2 numbers:\n"
 7     echo -e "$0 num1 num2"
 8     exit 1
 9 }
10 
11 #judge num
12 if [ $# -ne 2 ]
13     then 
14         print_usage
15 fi
16 
17 
18 #judge num
19 [ -n "`echo $1|sed 's/[0-9]//g' `" -a -n "`echo $2|sed 's/[0-9]//g'`" ] &&\
20     {
21         echo "$1 $2 must be number" ;
22         exit 1
23     }
24 
25 #judge body
26 if [ $1 -gt $2 ]
27     then 
28         echo "$1 > $2"
29     elif [ $1 -eq $2 ]
30         then
31             echo "$1 = $2"
32     else
33         echo "$1 < $2"
34 fi

View Code

9. nginx测试demo

View Code

10. 远程端口监控

 1 方案一:
 2 nmap 检查
 3 
 4 #!/bin/sh
 5 
 6 httpPortNum=`nmap 192.168.25.138 -p 80|grep open|wc -l`
 7 if [ $httpPortNum -eq 1 ]; then
 8         echo "httpd is running..."
 9 else
10         echo "httpd is not running..."
11         server httpd start
12 fi
13 
14 
15 方案二:
16 wget -T 10 -q --spider http://192.168.25.138 &>/dev/null
17 echo $?
18 
19 
20 方案三:
21 curl -I -s www.baidu.com |head -1|cut -d " " -f2
22 if [ 200 -eq HTTPCODE ]
23 echo $?
24 
25 实际生产测试:
26 #!/bin/sh
27 HTTPCODE=`curl -I -s www.baidu.com |head -1|cut -d " " -f2`
28 [ -f /etc/init.d/functions ] && . /etc/init.d/functions  || exit 1
29 if [ "$HTTPCODE" -eq "200" ];then
30     action "BaiDu/Nginx Http Server is Ok"  /bin/true
31 else  
32     action "BaiDu/Nginx Http Server is Error" /bin/false
33 fi
34 
35 方案四: -->手动输入IP进行判断
36 #!/bin/sh
37 
38 if [ $# -ne 1 ]; then
39   echo "USAGE: $0 IPADDR"
40   exit 1
41 fi
42 HTTPCODE=`curl -I -s "$1"|head -1|cut -d " " -f2`
43 [ -f /etc/init.d/functions ] && . /etc/init.d/functions  || exit 1
44 if [ "$HTTPCODE" -eq "200" ];then
45    action "BaiDu/Nginx Http Server "  /bin/true
46 else  
47    action "BaiDu/Nginx Http Server"   /bin/false
48 
49 fi
50     
51 方案五  -->优化nmap
52 #!/bin/sh
53 
54 if [ $# -ne 2 ]; then
55   echo "USAGE: $0 IPADDR PORT"
56   exit 1
57 fi
58 HTTPCODE=`nmap $1 -p $2|sed -n '7p'|awk '{print $2}'`             -->也可以统计数量是否为1
59 [ -f /etc/init.d/functions ] && . /etc/init.d/functions  || exit 1
60 if [ "$HTTPCODE" == "open" ];then
61    action "$1 on $2 port server " /bin/true
62 else  
63    action "$1 on $2 port server " /bin/false
64 
65 fi
66 
67 方案六:
68 
69 echo -e "\n"|telnet www.baidu.com 80|grep Connected|wc -l  -->可以执行完成第一个管道后执行换行命令
70 
71 方案七:
72 nc -w www.baidu.com 80 && echo ok

View Code

11. Mysql服务监控

 1 生成环境监控Mysqsl
 2 方案1:过滤3306端口,查看是否启动正常
 3     ps -ef|grep 3306 |grep -v grep   -->不建议,因为不太准,有的vi也是有显示结果的
 4     netstat -lnput|grep 3306
 5     netstat -lnput|grep 3306|wc -l   -->最常用的,如果为1,则表示开启,然后判读是否为1 if [ $port -eq 1 ]
 6 
 7 方案2;Mysql端口和进程同时存在,则服务正常
 8     PORT=`netstat -lnput|grep 3306|wc -l'`  
 9     PROCESS=`ps -ef|grep mysqld|grep -v grep|wc -l` 
10         
11 方案1:
12 #!/bin/sh
13 #Author: ftl
14 #Mysql Monitor
15 
16 PORT=`netstat -lnput|grep 3306|awk -F '[ :]+' '{print $5}'`  -->思路不是最佳
17 if [ $PORT -eq 3306 ];then                      -->最还用字符串判断  if [ "$PORT" == "3306" ]
18         echo "Mysql is Running ...."
19 else
20     service mysqld start
21 fi
22 
23 
24 方案2:
25 #!/bin/sh
26 #Author: ftl
27 #Mysql Monitor
28 
29 PORT=`netstat -lnput|grep 3306|wc -l`  
30 PROCESS=`ps -ef|grep mysqld|grep -v grep|wc -l`
31 #if [ $PORT -eq 1 -a $PROCESS -eq 1 ];then      -->相等的                            
32 if [ $PORT -eq 1 ] && [ $PROCESS -eq 2 ];then    
33         echo "Mysql is Running ...."
34 else
35         service mysqld start
36 fi
37 
38 
39 实际的解决:
40 #!/bin/sh
41 #Author: ftl
42 #Mysql Monitor
43 
44 PORT=`netstat -lnput|grep 3306|wc -l`
45 PROCESS=`ps -ef|grep mysqld|grep -v grep|wc -l`
46 #if [ $PORT -eq 1 -a $PROCESS -eq 1 ];then      -->相等的                            
47 if [ $PORT -eq 1 ] && [ $PROCESS -eq 2 ];then
48         echo "Mysql is Running ...."
49 else      
50         service mysqld start
51         sleep 10
52         PORT=`netstat -lnput|grep 3306|wc -l`
53         PROCESS=`ps -ef|grep mysqld|grep -v grep|wc -l`
54         if [ $PORT -eq 1 ] && [ $PROCESS -eq 2 ];then
55               echo "Mysql is Running ...."
56            else
57                 while true 
58                      do
59                         pkill mysqld >/dev/null 2>&1 
60                         sleep 1
61                         [ $? -ne  ] && break
62                      done
63         fi
64                 service mysqld start && echo 'mysql is running....'
65 fi  
66 
67 
68 
69 方案3:模拟web服务器,根据mysql账户进行连接,然后根据返回在状态判断mysql是否启动
70     mysql -uroot -proot -h localhost -e "select version()";  -->查看mysql版本
71 #!/bin/sh
72 #Author: ftl
73 #Mysql Monitor
74 
75 MYSQL_VERSION=`    mysql -uroot -proot -e "select version()" >/dev/null`
76 if [ $? -eq  ];then    
77         echo "Mysql is Running ...."
78 else
79         service mysqld start
80 fi
81 
82 
83 方案4:更专业的写法
84     用变量定义路径,
85     执行的脚本前面加上x判断  [ -x $MYSQL_SHELL ] >$LOG_DIR
86     mysql -uroot -proot -h localhost -e "select version()";   -->注意-h,用于远端的监控
87 
88 方案5:最佳的,利用php/java来进行监控
89     
90 <?php
91     $link_id=mysql_connect('db_etiantian','bbs','root') or mysql_error();
92     if($link_id){
93         echo "mysql is Ok ,Congratulation";
94     }else{
95         echo "Sorry,you can see logs of mysql";
96         echo mysql_error();
97     }
98 ?>   
99     

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12. 菜单联系

 1 #!/bin/sh
 2 # menu list for ftl by ftl 20170906
 3 
 4 menu(){
 5         cat <<END
 6         1.[install lamp]
 7         2.[install lnmp]
 8         3.[install mysql]
 9         4.[install nfs]
10         .[exit]
11 END
12 }
13 menu
14 read a
15 echo "you choose $a"

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13. epxr小技巧

 1 1.判断扩展名:
 2 
 3 if expr "hello.txt" : ".*\.txt"  -->判断文件拓展名是否为.txt  注意空格
 4     ->为真,则输出   9   显示匹配后的字符数,包括.txt
 5     ->为假,则输出非 
 6 
 7 
 8 2.判断是否是整数
 9     read -p "Please input"
10     expr $a +  &>/dev/null 
11     [ $? -eq  ] && echo int || echo char

View Code

14. let监听服务

 1 #/bin/sh
 2 #Function  Monitor by ftl 2017-09-06
 3 
 4 ServerMonitor(){
 5     #Monitro status
 6     timeout=10
 7     fails=
 8     success=
 9     while true
10     do
11         /usr/bin/wget --timeout=$timeout --tries=1 http://192.168.25.138 -q -0 /dev/null
12         if [ $? -ne  ]
13             then
14                 let fails+=1;
15                 success=
16             else
17                 fails=
18                 let success=1
19         fi
20 
21         if [ $success -ge 1 ]
22             then
23                 exit 
24         fi
25 
26         if [ $fails -ge 2 ]
27             then
28                 Critical="TMS is Wrong ,please Checking...."
29                 echo ${Critical}|mutt -s "httpd down,please contact hhh@ftl.com"
30         fi
31     done
32 
33 }

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15. 用source解析命令的使用

 1 [root@lamp01 omc]# echo 'dir=`date +%F`'>qq.sh 
 2 [root@lamp01 omc]# sh qq.sh 
 3 [root@lamp01 omc]# echo $dir
 4 
 5 [root@lamp01 omc]# bash qq.sh
 6 [root@lamp01 omc]# echo $dir
 7 
 8 [root@lamp01 omc]# source qq.sh
 9 [root@lamp01 omc]# echo $dir   
10 2017-09-05
11 [root@lamp01 omc]# 
12 说明:source将原来shell里面的东西作为结果传递给当前的shell去显示

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