[更新]ubuntu系统定时唤醒开机命令脚步

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待机后定时唤醒,本人ubuntu 14.04 LTS
测试例子:待机60秒后唤醒

sudo rtcwake -u -s 60 -m mem

写一个定时的脚本 suspend_until.sh

#!/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 
# 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 -u -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!"

chmod +x suspend_until.sh 

比如早上8点半自动唤醒

 suspend_until.sh 8:30 

参考 http://goo.gl/apFmNA 原文中的定时脚步代码中: sudo rtcwake -l -m mem -t $DESIRED 本人已经修改成 sudo rtcwake -u -m mem -t $DESIRED
修改后的测试时间是完全正确的,只是终端命令中现实出来的时间不对,实际待机唤醒的时间是对的