[root@node34 root]# service mysqld restart 
停止 MySQL：       [  确定  ]
启动 MySQL：       [  确定  ]

[root@web ~]# cat /sbin/service 
#!/bin/sh  
. /etc/init.d/functions  
  
VERSION="`basename $0` ver. 0.91"  
USAGE="Usage: `basename $0` < option > | --status-all | \  
[ service_name [ command | --full-restart ] ]"  
SERVICE=  
SERVICEDIR="/etc/init.d"   
OPTIONS=  
  
if [ $# -eq 0 ]; then  
   echo "${USAGE}" >&2  
   exit 1  
fi  
  
cd /  
while [ $# -gt 0 ]; do  
  case "${1}" in  
    --help | -h | --h* )  
       echo "${USAGE}" >&2  
       exit 0  
       ;;  
    --version | -V )  
       echo "${VERSION}" >&2  
       exit 0  
       ;;  
    *)  
       if [ -z "${SERVICE}" -a $# -eq 1 -a "${1}" = "--status-all" ]; then  
          cd ${SERVICEDIR}  
          for SERVICE in * ; do  
            case "${SERVICE}" in  
              functions | halt | killall | single| linuxconf| kudzu)  
                  ;;  
              *)  
                if ! is_ignored_file "${SERVICE}" \  
                    && [ -x "${SERVICEDIR}/${SERVICE}" ]; then  
                  env -i LANG="$LANG" PATH="$PATH" TERM="$TERM" "${SERVICEDIR}/${SERVICE}" status  
                fi  
                ;;  
            esac  
          done  
          exit 0  
       elif [ $# -eq 2 -a "${2}" = "--full-restart" ]; then  
          SERVICE="${1}"  
          if [ -x "${SERVICEDIR}/${SERVICE}" ]; then  
            env -i LANG="$LANG" PATH="$PATH" TERM="$TERM" "${SERVICEDIR}/${SERVICE}" stop  
            env -i LANG="$LANG" PATH="$PATH" TERM="$TERM" "${SERVICEDIR}/${SERVICE}" start  
            exit $?  
          fi  
       elif [ -z "${SERVICE}" ]; then  
         SERVICE="${1}"  
       else  
         OPTIONS="${OPTIONS} ${1}"  
       fi  
       shift  
       ;;  
   esac  
done  
  
if [ -x "${SERVICEDIR}/${SERVICE}" ]; then  
   env -i LANG="$LANG" PATH="$PATH" TERM="$TERM" "${SERVICEDIR}/${SERVICE}" ${OPTIONS}   
else  
   echo $"${SERVICE}: unrecognized service" >&2  
   exit 1  
fi 

[root@web init.d]# cat /etc/init.d/crond 
#! /bin/bash  
#  
# crond          Start/Stop the cron clock daemon.  
#  
# chkconfig: 2345 90 60   
# description: cron is a standard UNIX program that runs user-specified \  
#              programs at periodic scheduled times. vixie cron adds a \  
#              number of features to the basic UNIX cron, including better \  
#              security and more powerful configuration options.  
# processname: crond  
# config: /etc/crontab  
# pidfile: /var/run/crond.pid  
  
# Source function library.  
. /etc/init.d/functions  
. /etc/sysconfig/crond  
t=${CRON_VALIDATE_MAILRCPTS:-UNSET}  
[ "$t" != "UNSET" ] && export CRON_VALIDATE_MAILRCPTS="$t"  
   
# See how we were called.  
    
prog="crond"  
  
start() {  
        echo -n $"Starting $prog: "  
        if [ -e /var/lock/subsys/crond ]; then  
            if [ -e /var/run/crond.pid ] && [ -e /proc/`cat /var/run/crond.pid` ]; then  
                echo -n $"cannot start crond: crond is already running.";  
                failure $"cannot start crond: crond already running.";  
                echo  
                return 1  
            fi  
        fi  
        daemon crond $CRONDARGS  
        RETVAL=$?  
        echo  
        [ $RETVAL -eq 0 ] && touch /var/lock/subsys/crond;  
        return $RETVAL  
}  
  
stop() {  
        echo -n $"Stopping $prog: "  
        if [ ! -e /var/lock/subsys/crond ]; then  
            echo -n $"cannot stop crond: crond is not running."  
            failure $"cannot stop crond: crond is not running."  
            echo  
            return 1;  
        fi  
        killproc crond  
        RETVAL=$?  
        echo  
        [ $RETVAL -eq 0 ] && rm -f /var/lock/subsys/crond;  
        return $RETVAL  
}  
  
rhstatus() {  
        status crond  
}  
  
restart() {  
        stop  
        start  
}  
  
reload() {  
        echo -n $"Reloading cron daemon configuration: "  
        killproc crond -HUP  
        RETVAL=$?  
        echo  
        return $RETVAL  
}  
  
case "$1" in  
  start)  
        start  
        ;;  
  stop)  
        stop  
        ;;  
  restart)  
        restart  
        ;;  
  reload)  
        reload  
        ;;  
  status)  
        rhstatus  
        ;;  
  condrestart)  
        [ -f /var/lock/subsys/crond ] && restart || :  
        ;;  
  *)  
        echo $"Usage: $0 {start|stop|status|reload|restart|condrestart}"  
        exit 1  
esac