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