要安装pm2

sudo npm install -g pm2

生成启动脚本

pm2 startup ubuntu(centos in your case)

那么pm2会提示你运行命令,就我而言,就是这样

PM2 You have to run this command as root
PM2 Execute the following command :
PM2 sudo env PATH=$PATH:/usr/bin pm2 startup ubuntu -u USERNAME

然后你可以跑

sudo env PATH=$PATH:/usr/bin pm2 startup ubuntu -u USERNAME

然后你可以看到

PM2 Generating system init script in /etc/init.d/pm2-init.sh
PM2 Making script booting at startup...
PM2 -ubuntu- Using the command su -c "chmod +x /etc/init.d/pm2-init.sh && update-rc.d pm2-init.sh defaults"
Adding system startup for /etc/init.d/pm2-init.sh ...
   /etc/rc0.d/K20pm2-init.sh -> ../init.d/pm2-init.sh
   /etc/rc1.d/K20pm2-init.sh -> ../init.d/pm2-init.sh
   /etc/rc6.d/K20pm2-init.sh -> ../init.d/pm2-init.sh
   /etc/rc2.d/S20pm2-init.sh -> ../init.d/pm2-init.sh
   /etc/rc3.d/S20pm2-init.sh -> ../init.d/pm2-init.sh
   /etc/rc4.d/S20pm2-init.sh -> ../init.d/pm2-init.sh
   /etc/rc5.d/S20pm2-init.sh -> ../init.d/pm2-init.sh

PM2 Done.

一旦您启动了应用程序,并希望将它们保留在服务器重新启动上：

pm2 save

您可以参考https://github.com/Unitech/pm2#startup-script中的启动脚本部分