vim monitorProcess.sh

#!/bin/bash
if [ !  "$1" ]
then
        echo "please input the process key as a argc"
        exit
else
        ps -elf| grep $1 | grep -v grep > /dev/null
        if [  $? -ne 0 ]
        then
                echo " the $1 is not running,starting it  "
        else

                echo "the  $1 is  running"
        fi
fi

使用方法

ｓｈ　ｍｏｎｉｔｏｒｐｒｏｃｅｓｓ．ｓｈ　进程关键字　

几个注意点：
１.　判断参数是否为空　　！＄１

２．判断进程是否存在

ｐｓ　－ｅｌｆ　｜　ｇｒｅｐ　ｐｒｏｃｅｓｓｋｅｙ｜　ｇｒｅｐ　－ｖ　ｇｒｅｐ

这里有个ｇｒｅｐ　－ｖ

３.　ｉｆ　ｔｈｅｎ　　ｅｌｓｅ　　ｆｉ结构