if语句之监控

监控mysql服务是否开启：

#!/bin/basha=`ss -antlp | grep mysql|awk -F " " '{printf $4}'|sed  's/[^0-9]//g'`     ##提取mysql的端口号码b=` ps -ax |grep mysql | grep -v grep|wc -l`                ##提取mysql的进程个数if [[ $a -eq 3306 ]] && [[ $b -eq 2  ]]     then        printf "mysql is already running!\n"else    printf "mysql not is running,and starting mysql!\n"    systemctl start mariadb.servicefi

远程监控apache服务是否开启

#!/bin/basha=`nmap 172.25.254.103 -p 80|grep open |wc -l`if [[ $a -eq 1 ]]        then                printf "apache is already running!\n"else        printf "apache not is running!\n"        printf "Apache Starting..."fi

或者使用wget,curl通过url地址进行监控

[root@maillinux test]# wget -T 15 -q --spider http://172.25.254.13[root@maillinux test]# echo $?8[root@maillinux test]# curl -s http://172.25.254.103 >/dev/null[root@maillinux test]# echo $?0通过他们之中的任何一个返回值即可确定apache是否开启