不允许休眠
$ systemctl mask sleep.target suspend.target hibernate.target hybrid-sleep.target
查看状态
$ systemctl status sleep.target suspend.target hibernate.target hybrid-sleep.target
允许休眠
$ systemctl unmask sleep.target suspend.target hibernate.target hybrid-sleep.target
参考：
https://zhuanlan.zhihu.com/p/468870436
