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    Shell脚本实现温和方式重启Centos系统

    作者:admin 时间:2021-06-24 17:45

    主要目的是用于重启后台比较重要的进程,如果采用killall -9强制kill掉,可能会引起问题。比如数据库进程。代码如下:

    复制代码 代码如下:

    #!/bin/sh
    if [ -z "$1" ]; then
       /bin/echo "$0 <command line>"
       exit 1
    fi

    param=''
    list='2 3 4 5 6 7 8 9'
    for i in $list; do
       eval p='$'$i
       if [ -z $p ]; then
    break
       fi
       param="$param $p"
    done

    if [ -f /bin/awk ]; then
       AWK=/bin/awk
    else
       AWK=/usr/bin/awk
    fi

    if [ -f /bin/grep ]; then
       GREP=/bin/grep
    else
       GREP=/usr/bin/grep
    fi

    program=`/bin/echo $1 | $AWK -F '/' '{print $NF;}'`
    count=`/bin/ps auxww | $GREP -w $program | $GREP -v grep | /usr/bin/wc -l`
    if [ $count -gt 0 ]; then
       i=0
       /bin/echo "stopping $program ..."
       while [ 1 -eq 1 ]; do
    if [ $i -eq 0 ]; then
       /usr/bin/killall $program
    else
       /usr/bin/killall $program >/dev/null 2>&1
    fi

    if [ $? -ne 0 ]; then
       break
    fi

    /usr/bin/printf .
    /bin/sleep 1
    let i=$i+1
       done
    fi

    /bin/echo ""
    count=`/bin/ps auxww | $GREP -w $program | $GREP -v grep | $GREP -v $0 | /usr/bin/wc -l`
    if [ $count -eq 0 ]; then
       /bin/echo "starting $program ..."
       exec $1 $param
    else
       /bin/ps auxww | $GREP -w $program | $GREP -v grep | $GREP -v $0
       /bin/echo "already running $program count: $count, restart aborted!"
    fi

    js