环境检查

> cat /etc/redhat-release # linux的版本

应用管理

> systemctl start app.service #等同 service app start 
> systemctl restart app.service #等同 service app restart 
> systemctl status app.service #等同 service app status
> systemctl stop app.service #等同 service app stop

进程管理

ps aux | grep 进程相关信息
ps -ef |grep hello|awk '{print $2}'|xargs kill -9    杀死所有包含hello相关的进程