linux 判断某个进程是否存在，存在则重启，不存在则启动。

++++++++++++++++++++++++++++++++++++ 

PIDS=`ps -ef|grep "app.js"|grep -v grep`

if [ "$PIDS" != "" ]; then

pm2 restart app

echo "app restart!"

else

pm2 start app.js

echo "app started"

fi

 

+++++++++++++++++++++++++++++++++++

 

 ## 下面是node环境   webhook脚本配置 

#!/bin/bash

 

export NODE_HOME=/usr/bin/node

export PATH=$NODE_HOME/bin:$PATH

echo "++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++"

cd /www/wwwroot/api/nodeApi/

git reset --hard origin/master

git clean -f

git pull

PIDS=`ps -ef|grep "app.js"|grep -v grep`

if [ "$PIDS" != "" ]; then

pm2 restart app

echo "app restart!"

else

pm2 start app.js

echo "app started"

fi

pm2 show 0

echo "----------------------------------------------------------------------------"