shell 4

#!/bin/bash
d=`date`
c=`pgrep -l nginx | wc -l`
check_nginx()
{
  for  ((i=1;i<=5;i++))
  do
        /usr/local/nginx/sbin/nginx   2> /tmp/nginx.log
        if [ $? -eq 0 ]
        then
                echo "${d}nginx 重启${i}次成功" | mail -s "nginx 进程监控" 383xxxxx@qq.com
                break
        fi
  done
}
while :
do
        if [ c -gt 1000 ]
        then
                check_nginx
                if [ $i -eq 5 ]
                then
                        echo "${d}nginx 5次重启失败,请登录服务器处理" | mail  -s "nginx 进程监控" 383xxxxxx@qq.com
                        exit
                else
                        sleep 60
                        c1=`pgrep -l nginx | wc -l`
                        if [ c1 -gt 1000 ]
                        then
                                echo "${d}nginx重启后进行仍大于1000，请登录服务器处理" | mail -s "nginx 进程监控" 383xxxxx@qq.com
                                exit
                        fi
                fi
        fi
        sleep 20
done

shell 4

原文：https://blog.51cto.com/13667909/2506182