选题: Connect To Wifi From The Linux Command Line

sources/tech/20171002 Connect To Wifi From The Linux Command Line.md

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+translating by lujun9972
+Connect To Wifi From The Linux Command Line
+======
+
+### Objective
+
+Configure WiFi using only command line utilities.
+
+### Distributions
+
+This will work on any major Linux distribution.
+
+### Requirements
+
+A working Linux install with root privileges and a compatible wireless network adapter.
+
+### Difficulty
+
+Easy
+
+### Conventions
+
+  * **#** \- requires given command to be executed with root privileges either directly as a root user or by use of `sudo` command
+  * **$** \- given command to be executed as a regular non-privileged user
+
+
+
+### Introduction
+
+Lots of people like graphical utilities for managing their computers, but plenty don't too. If you prefer command line utilities, managing WiFi can be a real pain. Well, it doesn't have to be.
+
+wpa_supplicant can be used as a command line utility. You can actually set it up easily with a simple configuration file.
+
+### Scan For Your Network
+
+If you already know your network information, you can skip this step. If not, its a good way to figure out some info about the network you're connecting to.
+
+wpa_supplicant comes with a tool called `wpa_cli` which provides a command line interface to manage your WiFi connections. You can actually use it to set up everything, but setting up a configuration file seems a bit easier.
+
+Run `wpa_cli` with root privileges, then scan for networks.
+```
+
+# wpa_cli
+> scan
+
+```
+
+The scan will take a couple of minutes, and show you the networks in your area. Notate the one you want to connect to. Type `quit` to exit.
+
+### Generate a Block and Encrypt Your Password
+
+There's an even more convenient utility that you can use to begin setting up your configuration file. It takes the name of your network and the password and creates a file with a configuration block for that network with the password encrypted, so it's not stored in plain text.
+```
+
+# wpa_passphrase networkname password > /etc/wpa_supplicant/wpa_supplicant.conf
+
+```
+
+### Tailor Your Configuration
+
+Now, you have a configuration file located at `/etc/wpa_supplicant/wpa_supplicant.conf`. It's not much, just the network block with your network name and password, but you can build it out from there.
+
+Your file up in your favorite editor, and start by deleting the commented out password line. Then, add the following line to the top of the configuration.
+```
+ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=wheel
+
+```
+
+It just lets users in the `wheel` group manage wpa_supplicant. It can be convenient.
+
+Add the rest of this to the network block itself.
+
+If you're connecting to a hidden network, you can add the following line to tell wpa_supplicant to scan it first.
+```
+scan_ssid=1
+
+```
+
+Next, set the protocol and key management settings. These settings correspond to WPA2.
+```
+proto=RSN
+key_mgmt=WPA-PSK
+
+```
+
+The group and pairwise settings tell wpa_supplicant if you're using CCMP, TKIP, or both. For best security, you should only be using CCMP.
+```
+group=CCMP
+pairwise=CCMP
+
+```
+
+Finally, set the priority of the network. Higher values will connect first.
+```
+priority=10
+
+```
+
+
+![Complete WPA_Supplicant Settings][1]
+Save your configuration and restart wpa_supplicant for the changes to take effect.
+
+### Closing Thoughts
+
+Certainly, this method isn't the best for configuring wireless networks on-the-fly, but it works very well for the networks that you connect to on a regular basis.
+
+
+--------------------------------------------------------------------------------
+
+via: https://linuxconfig.org/connect-to-wifi-from-the-linux-command-line
+
+作者：[Nick Congleton][a]
+译者：[lujun9972](https://github.com/lujun9972)
+校对：[校对者ID](https://github.com/校对者ID)
+
+本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出
+
+[a]:https://linuxconfig.org
+[1]:https://linuxconfig.org/images/wpa-cli-config.jpg