如何在挂起/从挂起返回时运行命令？

我经常挂起笔记本电脑（pm-suspend），有时又经常挂起台式机（pm-suspend-hybrid）。我正在使用最新的Ubuntu（13.10，saucy）。

当我进入暂停状态或退出暂停状态后，是否可以运行命令？我想终止所有打开的ssh连接并停止offlineimap，因为这些连接的超时通常很烦人。有想法吗？

从联机帮助页pm-action(8)：

/etc/pm/sleep.d, /usr/lib/pm-utils/sleep.d
     Programs in these directories (called hooks) are combined
     and executed in C sort order before suspend and hibernate
     with as argument ´suspend´ or ´hibernate´. Afterwards they
     are called in reverse order with argument ´resume´ and
     ´thaw´ respectively. If both directories contain a similar
     named file, the one in /etc/pm/sleep.d will get preference.
     It is possible to disable a hook in the distribution
     directory by putting a non-executable file in
     /etc/pm/sleep.d, or by adding it to the HOOK_BLACKLIST
     configuration variable.

因此，您可以简单地输入如下的shell脚本：

#!/bin/bash

case "$1" in
suspend|hibernate)
    actions to
    take
    on suspend
    or hibernate
    ;;
resume|thaw)
    other actions
    to trigger
    on resume
    ;;
esac

导入99-myhooks.sh并使其可执行。

顺便说一句，您可以通过输入Enter~.EnterSSH会话来终止陈旧的SSH连接。