Deletes all network interfaces
sudo ip addr show | grep fc- | awk -F: '{print($2)}' | grep -v '^$' | while read i; do sudo ip link del $i; done
Deletes all bridges named
vmbr0-9
for i in {0..3}; do sudo ifconfig vmbr$i down; done && for i in {0..3}; do sudo brctl delbr vmbr$i; done