如何在Linux中禁用和挂起休眠

　　参考：https://www.a5idc.net/helpview_888.html

　　Ubuntu在启动以后过一段时间大概20分钟左右会自动休眠，在另外一台主机使用脚本检测80端口可以看到多久休眠

 　　禁用休眠前查看状态

 systemctl status sleep.target suspend.target hibernate.target hybrid-sleep.target
● sleep.target - Sleep
     Loaded: loaded (/lib/systemd/system/sleep.target; static; vendor preset: enabled)
     Active: inactive (dead)
       Docs: man:systemd.special(7)

8月 24 18:00:40 hdy-desktop systemd[1]: Reached target Sleep.
8月 24 18:02:50 hdy-desktop systemd[1]: Stopped target Sleep.
8月 24 18:22:50 hdy-desktop systemd[1]: Reached target Sleep.
8月 25 08:37:14 hdy-desktop systemd[1]: Stopped target Sleep.
8月 25 08:57:15 hdy-desktop systemd[1]: Reached target Sleep.
8月 25 09:03:24 hdy-desktop systemd[1]: Stopped target Sleep.
8月 25 09:23:25 hdy-desktop systemd[1]: Reached target Sleep.
8月 25 09:29:05 hdy-desktop systemd[1]: Stopped target Sleep.

● suspend.target - Suspend
     Loaded: loaded (/lib/systemd/system/suspend.target; static; vendor preset: enabled)
     Active: inactive (dead)
       Docs: man:systemd.special(7)

8月 24 18:02:50 hdy-desktop systemd[1]: Reached target Suspend.
8月 24 18:02:50 hdy-desktop systemd[1]: Stopped target Suspend.
8月 25 08:37:14 hdy-desktop systemd[1]: Reached target Suspend.
8月 25 08:37:14 hdy-desktop systemd[1]: Stopped target Suspend.
8月 25 09:03:24 hdy-desktop systemd[1]: Reached target Suspend.
8月 25 09:03:24 hdy-desktop systemd[1]: Stopped target Suspend.
8月 25 09:29:05 hdy-desktop systemd[1]: Reached target Suspend.
8月 25 09:29:05 hdy-desktop systemd[1]: Stopped target Suspend.

● hibernate.target - Hibernate
     Loaded: loaded (/lib/systemd/system/hibernate.target; static; vendor preset: enabled)
     Active: inactive (dead)
       Docs: man:systemd.special(7)

● hybrid-sleep.target - Hybrid Suspend+Hibernate
     Loaded: loaded (/lib/systemd/system/hybrid-sleep.target; static; vendor preset: enabled)
     Active: inactive (dead)
       Docs: man:systemd.special(7)

 　　禁止休眠

root@hdy-desktop:~# systemctl mask sleep.target suspend.target hibernate.target hybrid-sleep.target
Created symlink /etc/systemd/system/sleep.target → /dev/null.
Created symlink /etc/systemd/system/suspend.target → /dev/null.
Created symlink /etc/systemd/system/hibernate.target → /dev/null.
Created symlink /etc/systemd/system/hybrid-sleep.target → /dev/null.

 　　再次查看状态，变成masked了

root@hdy-desktop:~# systemctl status sleep.target suspend.target hibernate.target hybrid-sleep.target
● sleep.target
     Loaded: masked (Reason: Unit sleep.target is masked.)
     Active: inactive (dead)

8月 24 18:00:40 hdy-desktop systemd[1]: Reached target Sleep.
8月 24 18:02:50 hdy-desktop systemd[1]: Stopped target Sleep.
8月 24 18:22:50 hdy-desktop systemd[1]: Reached target Sleep.
8月 25 08:37:14 hdy-desktop systemd[1]: Stopped target Sleep.
8月 25 08:57:15 hdy-desktop systemd[1]: Reached target Sleep.
8月 25 09:03:24 hdy-desktop systemd[1]: Stopped target Sleep.
8月 25 09:23:25 hdy-desktop systemd[1]: Reached target Sleep.
8月 25 09:29:05 hdy-desktop systemd[1]: Stopped target Sleep.

● suspend.target
     Loaded: masked (Reason: Unit suspend.target is masked.)
     Active: inactive (dead)

8月 24 18:02:50 hdy-desktop systemd[1]: Reached target Suspend.
8月 24 18:02:50 hdy-desktop systemd[1]: Stopped target Suspend.
8月 25 08:37:14 hdy-desktop systemd[1]: Reached target Suspend.
8月 25 08:37:14 hdy-desktop systemd[1]: Stopped target Suspend.
8月 25 09:03:24 hdy-desktop systemd[1]: Reached target Suspend.
8月 25 09:03:24 hdy-desktop systemd[1]: Stopped target Suspend.
8月 25 09:29:05 hdy-desktop systemd[1]: Reached target Suspend.
8月 25 09:29:05 hdy-desktop systemd[1]: Stopped target Suspend.

● hibernate.target
     Loaded: masked (Reason: Unit hibernate.target is masked.)
     Active: inactive (dead)

● hybrid-sleep.target
     Loaded: masked (Reason: Unit hybrid-sleep.target is masked.)
     Active: inactive (dead)

 　　重启主机

reboot

 　　再次查看

root@hdy-desktop:~# systemctl status sleep.target suspend.target hibernate.target hybrid-sleep.target
● sleep.target
     Loaded: masked (Reason: Unit sleep.target is masked.)
     Active: inactive (dead)

● suspend.target
     Loaded: masked (Reason: Unit suspend.target is masked.)
     Active: inactive (dead)

● hibernate.target
     Loaded: masked (Reason: Unit hibernate.target is masked.)
     Active: inactive (dead)

● hybrid-sleep.target
     Loaded: masked (Reason: Unit hybrid-sleep.target is masked.)
     Active: inactive (dead)

 　　主机不在休眠了

　　重新启动休眠

 systemctl unmask sleep.target suspend.target hibernate.target hybrid-sleep.target

 　　注意：改禁止休眠命令Ubuntu和Centos通用