An alias is an alternative name assigned to a command. It is a shortcut that allows you to access a command more quickly and easily.
examples:
alias wifion='sudo wpa_supplicant -i wlx1234 -c /etc/wpa_supplicant/wpa_supplicant.conf -B'alias wifioff='sudo ip link set wlx1234 down'The above example is for turning wifi on and off, wifion and wifioff.
-B is for running in the background.
wlx1234 is the wifi network interface.