lk/networking/wpa_supplicant.md
Malin Freeborn ba8026e0c3
change formatting
input examples are now given as

```bash
input $ARG1
```

While outputs use md's '> ' sign as a quote.
2023-06-17 21:28:20 +02:00

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Markdown

---
title: "wpa_supplicant"
tags: [ "Documentation", "Networking" ]
---
wpa_supplicant configurations are stored in /etc/wpa_supplicant/wpa_supplicant-wlan0 (or equivalent).
## WiFi Connection
```bash
wpa_cli
```
Once in, scan the network, add an empty place to store credentials, then input them.
```bash
scan
```
```bash
scan_results
```
```bash
add_network
```
This outputs a network number, e.g. '3'. This is the new network you'll work with.
```bash
set_network *3* ssid *"Kosachok Cafe"*
```
```bash
set_network 3 psk *"Kosachok2019"*
```
OR (for no password)
```bash
set_network *3* key_mgmt NONE
```
```bash
enable_network 3
```
```bash
save_config
```
This takes a while to connect, so to speed things up, restart the service:
```bash
sudo sv restart wpa_supplicant
```
# Scripts
You can script like this:
```bash
wpa_cli add_network
```
That returns an ID, so you can say:
```bash
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:
```bash
wpa_cli set_network *3* psk *\""passphrase"\"*
```
## Generating Keys Manually
```bash
wpa_passphrase [ssid] [password]
```
For example:
```bash
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:
```bash
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.