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基于 Rtcwake 的脚本无法作为 cronjob 运行

tag-icon • tag-icon suspend cron
基于 Rtcwake 的脚本无法作为 cronjob 运行

我正在尝试使用以下唤醒脚本，我发现这里，让我的电脑在晚上进入睡眠状态并在早上唤醒它。该脚本使用唤醒：

#!/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 <[email protected]>
# 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!"

当我从命令行手动运行该脚本时，它工作正常，但当作为 cronjob 运行时，它永远不会关闭计算机。crontab 命令如下：

02 10 * * * /home/***/bin/suspend_until 10:03 >> /home/ethan/log/suspend.log 2>$1

日志是空的，所以我无法确切知道发生了什么。有什么想法吗？

答案1

解决方案是使用 sudo：sudo crontab -e'

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