4 ifdown: configuring interface eth0=work (inet)
5 /bin/run-parts --verbose /etc/network/if-down.d
7 /sbin/ip addr del 1.2.3.4/255.255.255.0 broadcast 1.2.3.255 dev eth0 label eth0
8 /sbin/ip -4 addr flush dev eth0
9 /sbin/ip link set dev eth0 down
10 /bin/run-parts --verbose /etc/network/if-post-down.d