$ curl cheat.sh/

# brctl
# Ethernet bridge administration.
# More information: <https://manned.org/brctl>.

# Show a list with information about currently existing Ethernet bridges:
sudo brctl show

# Create a new Ethernet bridge interface:
sudo brctl add bridge_name

# Delete an existing Ethernet bridge interface:
sudo brctl del bridge_name

# Add an interface to an existing bridge:
sudo brctl addif bridge_name interface_name

# Remove an interface from an existing bridge:
sudo brctl delif bridge_name interface_name

$

Follow @igor_chubin cheat.sh tldr