thufir@dur:~$
thufir@dur:~$ sudo ifconfig br0 down up
br0: ERROR while getting interface flags: No such device
br0: ERROR while getting interface flags: No such device
thufir@dur:~$
thufir@dur:~$ cat /etc/network/interfaces
# interfaces(5) file used by ifup(8) and ifdown(8)
auto lo
iface lo inet loopback


auto br0
iface br0 inet dhcp
    bridge_ports eno1
    bridge_stp off
    bridge_fd 0
    bridge_maxwait 0
iface eno1 inet manual





thufir@dur:~$