lk/networking/wpa_supplicant.md
2022-11-06 14:28:09 +01:00

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---
title: "wpa_supplicant"
tags: [ "Documentation", "Networking" ]
---
wpa_supplicant configurations are stored in /etc/wpa_supplicant/wpa_supplicant-wlan0 (or equivalent).
## WiFi Connection
> wpa_cli
Once in, scan the network, add an empty place to store credentials, then input them.
> scan
> scan_results
> add_network
This outputs a network number, e.g. '3'. This is the new network you'll work with.
> set_network *3* ssid *"Kosachok Cafe"*
> set_network 3 psk *"Kosachok2019"*
OR (for no password)
> set_network *3* key_mgmt NONE
> enable_network 3
> save_config
This takes a while to connect, so to speed things up, restart the service:
> sudo sv restart wpa_supplicant
# Scripts
You can script like this:
> wpa_cli add_network
That returns an ID, so you can say:
> newNetwork="$(wpa_cli add_network)"
Then `$newNetwork` would equal that number, and you can add/ remove networks with scripts.
But remember to escape the quotes, so adding a network would be:
> wpa_cli set_network *3* psk *\""passphrase"\"*
## Generating Keys Manually
> wpa_passphrase [ssid] [password]
For example:
> wpa_passphrase 'Cafe Kosachok' 'Kosachok2019'
This then spills the relevant psk and such to be entered into the wpa_supplicant configuration file.
If you encounter problems, you will probably need to delete the old device pid in (e.g.) /run/wlan0/
Next up, start wpa_supplicant:
> wpa_supplicant -B -iwlan0 -c /etc/wpa_supplicant/wpa_supplicant-wlan0
The -B flag runs this as a background process. Remove this to see real-time output in order to solve problems. The -i flag denotes the physical device used for the wifi. The -c flag points to the configuration file for use.