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160 lines
5.1 KiB
Markdown
160 lines
5.1 KiB
Markdown
[#]: collector: (lujun9972)
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[#]: translator: (geekpi)
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[#]: reviewer: (wxy)
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[#]: publisher: (wxy)
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[#]: url: (https://linux.cn/article-13036-1.html)
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[#]: subject: (How to get Battery status notification when a battery is full or low)
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[#]: via: (https://www.2daygeek.com/linux-low-full-charge-discharge-battery-notification/)
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[#]: author: (Magesh Maruthamuthu https://www.2daygeek.com/author/magesh/)
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如何在电池充满或低电量时获得电池状态通知
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======
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对于类 Unix 用户来说，Linux 笔记本是不错的选择，但它经常会耗尽电池。我试过很多 Linux 操作系统，但没有像 Windows 那样电池寿命长。
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充电时间长了会对电池造成损害，所以在电池 100% 充满时要拔掉电源线。电池充电或放电时没有默认的应用程序来通知，需要安装第三方应用来通知你。
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为此，我通常会安装 [Battery Monitor][1]，但它已经被废弃，所以我创建了一个 shell 脚本来获取通知。
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笔记本电池充放电状态可以通过以下两个命令来识别。
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使用 `acpi` 命令。
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```
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$ acpi -b
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Battery 0: Discharging, 71%, 00:58:39 remaining
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```
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使用 `upower` 命令。
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```
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$ upower -i /org/freedesktop/UPower/devices/battery_BAT0 | grep -w 'state|percentage' | awk '{print $2}'
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discharging
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64%
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```
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### 方法 1：当电池电量高于 95% 或低于 20% 时，用 Shell 脚本发送警报
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这个脚本在启动时在后台运行，每分钟检查一次电池状态，然后在电池电量超过 95% 或放电时电量低于 20% 时发送通知。
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警报会直到你的电池电量超过 20% 或低于 95% 时才会停止。
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```
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$ sudo vi /opt/scripts/battery-status.sh
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```
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```
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#!/bin/bash
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while true
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do
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battery_level=`acpi -b | grep -P -o '[0-9]+(?=%)'`
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if [ $battery_level -ge 95 ]; then
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notify-send "Battery Full" "Level: ${battery_level}%"
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paplay /usr/share/sounds/freedesktop/stereo/suspend-error.oga
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elif [ $battery_level -le 20 ]; then
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notify-send --urgency=CRITICAL "Battery Low" "Level: ${battery_level}%"
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paplay /usr/share/sounds/freedesktop/stereo/suspend-error.oga
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fi
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sleep 60
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done
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```
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脚本完成后，设置可执行权限：
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```
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$ sudo chmod +x /opt/scripts/battery-status.sh
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```
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最后，将该脚本添加到用户配置文件的底部。对于全局范围来说，你需要在 `/etc/profile` 文件中添加该脚本。
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```
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$ vi /home/magi/.profile
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/opt/scripts/battery-status.sh &
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```
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[重启你的 Linux 系统][2]来检查这点。
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```
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$ sudo reboot
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```
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### 方法 2：当电池充电（高于 95%）或放电（低于 20%）时发送通知的 Shell 脚本
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这个脚本与上面的脚本类似，但它是由交流适配器负责。
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如果你插上了交流适配器，而且电池的电量超过 95%，它就会发出一个带有声音的通知，但是这个通知不会停止，直到你拔掉交流适配器。
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![][3]
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如果你拔掉交流适配器，你将永远不会再看到通知，直到你的电池电量下降到 20%。
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![][5]
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```
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$ sudo vi /opt/scripts/battery-status-1.sh
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```
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```
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#!/bin/bash
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while true
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do
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export DISPLAY=:0.0
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battery_level=`acpi -b | grep -P -o '[0-9]+(?=%)'`
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if on_ac_power; then
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if [ $battery_level -ge 95 ]; then
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notify-send "Battery Full" "Level: ${battery_level}% "
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paplay /usr/share/sounds/freedesktop/stereo/suspend-error.oga
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fi
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else
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if [ $battery_level -le 20 ]; then
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notify-send --urgency=CRITICAL "Battery Low" "Level: ${battery_level}%"
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paplay /usr/share/sounds/freedesktop/stereo/suspend-error.oga
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fi
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fi
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sleep 60
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done
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```
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脚本完成后，设置执行权限：
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```
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$ sudo chmod +x /opt/scripts/battery-status-1.sh
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```
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最后将脚本添加到用户配置文件的底部。对于全局范围来说，你需要在 `/etc/profile` 文件中添加该脚本。
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```
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$ vi /home/magi/.profile
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/opt/scripts/battery-status-1.sh &
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```
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重启系统来检查：
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```
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$ sudo reboot
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```
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参考： [stackexchange][4]
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--------------------------------------------------------------------------------
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via: https://www.2daygeek.com/linux-low-full-charge-discharge-battery-notification/
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作者：[Magesh Maruthamuthu][a]
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选题：[lujun9972][b]
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译者：[geekpi](https://github.com/geekpi)
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校对：[校对者ID](https://github.com/校对者ID)
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本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出
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[a]: https://www.2daygeek.com/author/magesh/
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[b]: https://github.com/lujun9972
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[1]: https://www.2daygeek.com/category/battery-monitor/
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[2]: https://www.2daygeek.com/6-commands-to-shutdown-halt-poweroff-reboot-the-linux-system/
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[3]: https://i0.wp.com/www.2daygeek.com/wp-content/uploads/2021/01/linux-low-full-battery-notification-2.png?w=1046&ssl=1
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[4]: https://unix.stackexchange.com/questions/60778/how-can-i-get-an-alert-when-my-battery-is-about-to-die-in-linux-mint
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[5]: https://i1.wp.com/www.2daygeek.com/wp-content/uploads/2021/01/linux-low-full-battery-notification-3.png?w=1029&ssl=1 |