How to toggle a network interface in Pop OS 20.04 (on the wise ThinkPad)

disable_network_interface.sh

# To show the current link state
ip link show

# To disable the wlp3s0 interface (the built in one)

if=wlp3s0
sudo ip link set $if down

# or
sudo ip link set wlp3s0 down

# or, of course
sudo ip link set wlp3s0 up

# https://unix.stackexchange.com/questions/111256/how-to-permanently-disable-a-network-interface
# To enable/disable permanently (and therefore on restart)
sudo nano /etc/network/interfaces

# Add in/remove the line
# iface wlan0 inet manual

# Restart Networkmanager with
 sudo service network-manager restart