# ifupdown has been replaced by netplan(5) on this system.  See
# /etc/netplan for current configuration.
# To re-enable ifupdown on this system, you can run:
#    sudo apt install ifupdown
auto lo
iface lo inet loopback

auto eth0
iface eth0 inet dhcp

auto eth1
iface eth1 inet manual
    pre-up ifconfig $IFACE  up
    post-down ifconfig $IFACE down

auto eth2
iface eth2 inet manual
    up ifconfig $IFACE up
    post-down ifconfig $IFACE down

auto eth3
iface eth3 inet manual
    up ifconfig $IFACE up
    post-down ifconfig $IFACE down

auto eth4
iface eth4 inet manual
    up ifconfig $IFACE up
    post-down ifconfig $IFACE down

auto wlp1s0
iface wlp1s0 inet static
address 192.168.6.1
network 192.168.6.0
netmask 255.255.255.0
brodcast 192.168.6.255
   # up ifconfig $IFACE up
   # post-down ifconfig $IFACE down