networksetup

Configuration tool for Network System Preferences. More information: https://support.apple.com/guide/remote-desktop/about-networksetup-apdd0c5a2d5/mac.

List available network service providers (Ethernet, Wi-Fi, Bluetooth, etc):

networksetup -listallnetworkservices

Show network settings for a particular networking device:

networksetup -getinfo "{{Wi-Fi}}"

Get currently connected Wi-Fi network name (Wi-Fi device usually en0 or en1):

networksetup -getairportnetwork {{en0}}

Connect to a particular Wi-Fi network:

networksetup -setairportnetwork {{en0}} {{Airport Network SSID}} {{password}}