问题描述
我如何休眠或睡眠我的Ubuntu 10.10桌面并在第二天让它”wake up”？
我见过可以在Windows上执行此操作的软件，因此在Ubuntu上不难！
最佳解决方法
rtcwake
您感兴趣的命令是rtcwake：
This program is used to enter a system sleep state until specified wakeup time.
testing
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。重要参数是mem您可以选择几个选项 – 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.
暂停到一个已知的时间
脚本(在本文的底部)可用于暂停您的计算机并在特定时间唤醒：
例如，语法是suspend_until [hh:mm]
sudo ./suspend_until 07:30
将脚本保存为名称suspend_until并赋予其执行权限，即
chmod +x suspend_until
Cron
您可以创建一个调用此脚本的root cron作业，以便在晚上的特定时间执行，然后在早上唤醒：
sudo crontab -e
现在输入类似于在23:30运行暂停脚本的内容：
30 23 * * * /home/myhomefolder/suspend_until 07:30
suspend_until脚本
#!/bin/bash
# Auto suspend and wake-up script
#
# Puts the computer on standby and automatically wakes it up at specified time
#
# Written by Romke van der Meulen <redge.online@gmail.com>
# Minor mods fossfreedom for AskUbuntu
#
# Takes a 24hour time HH:MM as its argument
# Example:
# suspend_until 9:30
# suspend_until 18:45
# ------------------------------------------------------
# Argument check
if [ $# -lt 1 ]; then
echo "Usage: suspend_until HH:MM"
exit
fi
# Check whether specified time today or tomorrow
DESIRED=$((`date +%s -d "$1"`))
NOW=$((`date +%s`))
if [ $DESIRED -lt $NOW ]; then
DESIRED=$((`date +%s -d "$1"` + 24*60*60))
fi
# Kill rtcwake if already running
sudo killall rtcwake
# Set RTC wakeup time
# N.B. change "mem" for the suspend option
# find this by "man rtcwake"
sudo rtcwake -l -m mem -t $DESIRED &
# feedback
echo "Suspending..."
# give rtcwake some time to make its stuff
sleep 2
# then suspend
# N.B. dont usually require this bit
#sudo pm-suspend
# Any commands you want to launch after wakeup can be placed here
# Remember: sudo may have expired by now
# Wake up with monitor enabled N.B. change "on" for "off" if
# you want the monitor to be disabled on wake
xset dpms force on
# and a fresh console
clear
echo "Good morning!"
注：
在脚本的这一部分中更改mem以获取适用于您的任何暂停方法：
# Set RTC wakeup time
sudo rtcwake -l -m mem -t $DESIRED &
您可能还必须使用-u标志代替-l标志，具体取决于您的硬件时钟是使用UTC(-u)还是本地(-l)时间。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。
贷记给redgeonline
次佳解决方法
使用rtcwake我创建了一个简单的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
#!/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