在特定时间自动休眠和唤醒

Question

如何让我的 Ubuntu 10.10 桌面休眠或睡眠并让它在第二天“醒来”？

我见过可以在 Windows 上执行此操作的软件，因此在 Ubuntu 上并不难！

Answer 1

唤醒

您感兴趣的命令是rtcwake：

该程序用于进入系统休眠状态，直到指定的唤醒时间。

测试

要找到适合您的正确语法，请尝试以下操作：

sudo rtcwake -u -s 60 -m mem

这应该在恢复之前暂停计算机 60 秒。重要的参数是mem 您可以选择多个选项 - 播放以找到最适合您的值：

          standby
                 ACPI state S1. This state offers  minimal,  though  real,
                 power savings, while providing a very low-latency transi?
                 tion back to a working system. This is the default mode.

          mem    ACPI state S3 (Suspend-to-RAM). This state offers signif?
                 icant  power  savings  as everything in the system is put
                 into a low-power  state,  except  for  memory,  which  is
                 placed in self-refresh mode to retain its contents.

          disk   ACPI  state  S4  (Suspend-to-disk). This state offers the
                 greatest power savings, and  can  be  used  even  in  the
                 absence  of  low-level platform support for power manage?
                 ment. This state operates  similarly  to  Suspend-to-RAM,
                 but  includes  a final step of writing memory contents to
                 disk.

          off    ACPI  state  S5  (Poweroff).  This  is  done  by  calling
                 '/sbin/shutdown'.   Not officially supported by ACPI, but
                 usually working.

          no     Don't suspend. The rtcwake command sets RTC  wakeup  time
                 only.

          on     Don't  suspend,  but  read  RTC  device  until alarm time
                 appears. This mode is useful for debugging.

暂停到已知时间

一个脚本（在这篇文章的底部）可用于暂停您的计算机并在特定时间唤醒：

语法是suspend_until [hh:mm]例如

sudo ./suspend_until 07:30

将脚本保存为名称suspend_until并赋予它执行权限即

chmod +x suspend_until

定时任务

您可以创建一个根 cron 作业，调用此脚本在晚上的特定时间执行，然后在早上醒来：

sudo crontab -e

现在输入类似在 23:30 运行挂起脚本的内容：

30 23 * * * /home/myhomefolder/suspend_until 07:30

suspend_until 脚本

sudo rtcwake -u -s 60 -m mem

NB

更改mem脚本的这一部分以使用适合您的挂起方法：

# Set RTC wakeup time
sudo rtcwake -l -m mem -t $DESIRED &

您可能还需要根据您的硬件时钟是使用 UTC ( ) 还是本地 ( ) 时间来替换-u标志来代替标志。请注意，您的硬件时钟与您在操作系统中看到的系统时钟不同。-l-u-l

归功于redgeonline

Answer 2

我使用 rtcwake 创建了一个简单的 bash 脚本。它使用php将自然语言翻译成系统时间。例如：

• sudo ./cu "tomorrow 9am"

• sudo ./cu "next monday 3pm"

• sudo ./cu "1 hour ago"

  rtcwake: time doesn't go backward

你可以在这里下载。

#!/bin/bash
export sdate=$1

date=`/usr/bin/php << 'EOF'
<?php
date_default_timezone_set("Etc/GMT-2");
$date = strtotime(GETENV("sdate"));
echo "\r".$date;
EOF`

rtcwake -m mem -t $date