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150 lines
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150 lines
3.6 KiB
Markdown
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如何为 Linux 无线网卡配置无线唤醒功能
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======
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我有一台用于备份我的所有设备的网络存储（NAS）服务器。然而当我备份我的 Linux 笔记本时遇到了困难。当它休眠或挂起时我不能备份它。当我使用基于 Intel 的无线网卡时，我可以配置笔记本上的 WiFi 接受无线唤醒吗？
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<ruby>[网络唤醒][2]<rt>Wake-on-LAN</rt></ruby>（WOL）是一个以太网标准，它允许服务器通过一个网络消息而被打开。你需要发送一个“魔法数据包”到支持网络唤醒的以太网卡和主板，以便打开被唤醒的系统。
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[![linux-configire-wake-on-wireless-lan-wowlan][1]][1]
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<ruby>无线唤醒<rt>wireless wake-on-lan</rt></ruby>（WoWLAN 或 WoW）允许 Linux 系统进入低耗电模式的情况下保持无线网卡处于激活状态，依然与热点连接。这篇教程演示了如何在一台安装无线网卡的 Linux 笔记本或桌面电脑上启用 WoWLAN / WoW 模式。
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> 请注意，不是所有的无线网卡和 Linux 驱动程序都支持 WoWLAN。
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### 语法
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在 Linux 系统上，你需要使用 `iw` 命令来查看和操作无线设备及其配置。 其格式为：
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```
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iw command
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iw [options] command
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```
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### 列出所有的无线设备及其功能
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输入下面命令：
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```
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$ iw list
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$ iw list | more
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$ iw dev
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```
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输出为：
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```
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phy#0
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Interface wlp3s0
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ifindex 3
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wdev 0x1
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addr 6c:88:14:ff:36:d0
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type managed
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channel 149 (5745 MHz)，width： 40 MHz， center1： 5755 MHz
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txpower 15.00 dBm
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```
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请记下这个 `phy0`。
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### 查看无线唤醒的当前状态
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打开终端并输入下面命令来查看无线网络的状态：
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```
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$ iw phy0 wowlan show
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```
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输出为：
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```
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WoWLAN is disabled
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```
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### 如何启用无线唤醒
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启用的语法为：
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`sudo iw phy {phyname} wowlan enable {option}`
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其中，
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1. `{phyname}` - 使用 `iw dev` 来获取其物理名。
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2. `{option}` - 可以是 `any`、`disconnect`、`magic-packet` 等。
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比如，我想为 `phy0` 开启无线唤醒：
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```
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$ sudo iw phy0 wowlan enable any
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```
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或者：
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```
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$ sudo iw phy0 wowlan enable magic-packet disconnect
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```
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检查一下：
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```
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$ iw phy0 wowlan show
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```
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结果为：
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```
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WoWLAN is enabled：
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* wake up on disconnect
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* wake up on magic packet
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```
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### 测试一下
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将你的笔记本挂起或者进入休眠模式：
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```
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$ sudo sh -c 'echo mem > /sys/power/state'
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```
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从 NAS 服务器上使用 [ping 命令][3] 发送 ping 请求
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```
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$ ping your-laptop-ip
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```
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也可以 [使用 `wakeonlan` 命令发送魔法数据包][4]：
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```
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$ wakeonlan laptop-mac-address-here
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$ etherwake MAC-Address-Here
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```
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### 如何禁用无线唤醒？
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语法为：
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```
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$ sudo phy {phyname} wowlan disable
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$ sudo phy0 wowlan disable
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```
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更多信息请阅读 `iw` 命令的 man 页：
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```
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$ man iw
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$ iw --help
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```
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--------------------------------------------------------------------------------
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via: https://www.cyberciti.biz/faq/configure-wireless-wake-on-lan-for-linux-wifi-wowlan-card/
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作者：[Vivek Gite][a]
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译者：[lujun9972](https://github.com/lujun9972)
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校对：[wxy](https://github.com/wxy)
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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://twitter.com/nixcraft
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[1]: https://www.cyberciti.biz/media/new/faq/2017/12/linux-configire-wake-on-wireless-lan-wowlan.jpg
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[2]: https://www.cyberciti.biz/tips/linux-send-wake-on-lan-wol-magic-packets.html
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[3]: https://www.cyberciti.biz/faq/unix-ping-command-examples/ (See Linux/Unix ping command examples for more info)
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[4]: https://www.cyberciti.biz/faq/apple-os-x-wake-on-lancommand-line-utility/
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