pm2 autostart

1. 设置 pm2 开机启动，执行下面的脚本即可

• 参考：
  a. http://cnodejs.org/topic/556f02a98ce3684b284b55ad
  a. https://www.zhihu.com/question/40099216/answer/84720423

#!/bin/bash
pm2 start /data/www/mobi/mobi_pm2.json && \
   pm2 save && \
   pm2 startup

# then it has a file in /etc/init.d/pm2-root
# [root@dbquan-pc ~]# chkconfig | grep pm2
# pm2-root        0:off   1:off   2:on    3:on    4:on    5:on    6:off
#
# ok, nexttime reboot will auto restart pm2


# [PM2] Freeze a process list on reboot via:
# $ pm2 save
#
# [PM2] Remove init script via:
# $ pm2 unstartup systemv