If you want Debian working with wifi on every reboot then you need to configure it. First thing to do is make sure the interface is up using<\/p>\n
ip link show<\/pre>\nIf not then bring it up:<\/p>\n
ip link set up wlp2so<\/pre>\nNOTE: your network interface name might be different.<\/p>\n
One is assuming that you know the SSID of your wifi network but this may be a helpful tool to check that the hardware is working.<\/p>\n
iwlist scan | grep ESSID<\/pre>\nThis should return a list of available networks.<\/p>\n
<\/p>\n
For WPA2-PSK networks (which is all I really care about ATM) you need to issue the following command:<\/p>\n
$ su -l -c \"wpa_passphrase myssid my_very_secret_passphrase > \/etc\/wpa_supplicant\/wpa_supplicant-wlp2s0.conf\"<\/pre>\nNOTE: the text “wpa_passphrase” is literal\u00a0 “myssid” need changing to the SSID that you wish to connect to and you also need to change “my_very_secret_passphrase” to your wifi password.<\/p>\n
WARNING: The naming of the file is important as if you do not name it correctly then the service will not start.\u00a0 You must append “wpa_supplicant” with a hyphen ‘-‘ followed by the interface name.<\/p>\n
Now if you review the file that the previous command has created then it should look something like:<\/p>\n
network={\r\n ssid=\"myssid\"\r\n #psk=\"my_very_secret_passphrase\"\r\n psk=ccb290fd4fe6b22935cbae31449e050edd02ad44627b16ce0151668f5f53c01b\r\n}<\/pre>\nNow you can enable wpa_supplicant by issuing<\/p>\n
systemctl enable wpa_supplicant@wlp2S0<\/pre>\nand now you should be able to start the service.<\/p>\n
<\/p>\n
Legacy method:<\/strong><\/p>\n
You have a couple of options as to what to do next.\u00a0 For Debian based systems the traditional way is as follows:<\/p>\n
Next configure \/etc\/network\/interfaces by adding the following 2 lines<\/p>\n
allow-hotplug wlp2s0\r\niface wlp2s0 inet dhcp\r\n<\/pre>\nObviously you can set a static ip here in the usual way if you wish.<\/p>\n
Finally<\/p>\n
ifup wlp2s0<\/pre>\nshould start then network.<\/p>\n
<\/p>\n
ADDITIONAL:<\/p>\n
if you want to enable wpa_cli then according to the debian wiki you need to append the following to the wpa_supplicant.conf file<\/p>\n
ctrl_interface=\/run\/wpa_supplicant \r\nupdate_config=1<\/pre>\n<\/p>\n
https:\/\/support.speedify.com\/article\/826-connect-different-wi-fi-interfaces-to-different-networks-linux<\/p>\n
demonstrates how to use wpa_cli to add more networks:<\/p>\n
<\/p>\n
This is taken from the speedify website (Currently untested).<\/p>\n
“When starting the wpa_cli, you can select the interface you want to configure using the -i argument.<\/p>\n
For example:<\/p>\n
wpa_cli -i wlan0<\/p>\n
It will launch into an interactive mode where you can set options. From here you can confirm that the adapter is scanning and seeing networks by running:<\/p>\n
scan<\/p>\n
scan_results<\/p>\n
That should show a list of the available wireless networks. Then you can add and configure a network, analogous to what you would put in the wpa_supplicant.conf file.<\/p>\n
If you\u2019ve already been playing with adding networks in the wpa_supplicant.conf file, you might want to remove them, or you can directly modify them with the wpa_cli tool.<\/p>\n
Run<\/p>\n
list_networks<\/p>\n
to see any existing network configurations. If you already have one in the list, you can modify by using its ID in the command below. Otherwise, add a new network and take notes of its ID.<\/p>\n
add_network<\/p>\n
set_network <ID> ssid “The WiFi SSID”<\/p>\n
set_network <ID> psk “password”<\/p>\n
enable_network <ID><\/p>\n
If you have multiple network configurations, you might need to do:<\/p>\n
select_network <ID><\/p>\n
If it is a simple network, that should be enough to get it to start connecting to the Wi-Fi network. You can save the configuration by running:<\/p>\n
save_config<\/p>\n
You can then quit out of the wpa_cli session and start it with the next interface and repeat the above steps.”<\/p>\n
<\/p>\n
Systemd built in network manager<\/strong><\/p>\n
Instead of using a separate network manager it is now possible to use the built in systemd-networkd<\/p>\n
You create a file for each interface and.\u00a0 The files are prefixed with a number (a priority) and have the “.network<\/strong>” suffix. and should be placed in \/etc\/systemd\/network.<\/strong><\/p>\n
To configure the wifi interface set up wpa_supplicant as directed and then create a configuration file<\/p>\n
touch \/etc\/systemd\/network\/20-somename.network<\/pre>\nFor a simple dhcp example you just put<\/p>\n
[Match]\r\nName=wlp2s0\r\n[Network]\r\nDHCP=yes\r\n<\/pre>\nin the file and and save it.\u00a0 Make sure to enable and start systemd-networkd.\u00a0 You can check if the interface is up with either “ip a” or “networkctl”<\/p>\n
NOTE:\u00a0 make sure you don’t have any other network manager services running if you are going to use this method.<\/p>\n
<\/p>\n
<\/p>\n","protected":false},"excerpt":{"rendered":"
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