In this video I show you how to connect to wifi on the linux command line in a live cd (this works for gentoo, arch linux, void linux, any live cd that has wpa_supplicant installed on it)

you'll need to know your wifi ssid (name) wifi password, and the name of your wifi card (you can find it with the command ip link)

vi into /etc/wpa_supplicant/wpa_supplicant-$NAMEOFWIFI.conf ($NAMEOFWIFI is the string for your device you get from ip link)

add the following to the file ctrl_interface=/run/wpa_supplicant update_config=1 :wq to save

run the following command and have its output append to the file you just created

wpa_passphrase (ssid) (wifi_password)

finally initialize the connection with

wpa_supplicant -B -i $interface_name -c /etc/wpa_supplicant/wpa_supplicant.conf

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