sudo ifdown -v eth0 && printf "\n\n\n\n" && sudo ifup -v eth0
Configuring interface eth0=eth0 (inet)
/bin/run-parts --verbose /etc/network/if-down.d
run-parts: executing /etc/network/if-down.d/resolvconf
run-parts: executing /etc/network/if-down.d/upstart
 /bin/ip route del default via 10.0.4.1  dev eth0 2>&1 1>/dev/null || true 
/bin/ip addr del 10.0.4.185/255.255.255.0 broadcast 10.0.4.255    dev eth0 label eth0
/bin/ip link set dev eth0 down
/bin/run-parts --verbose /etc/network/if-post-down.d




Configuring interface eth0=eth0 (inet)
/bin/run-parts --exit-on-error --verbose /etc/network/if-pre-up.d
/bin/ip addr add 10.0.4.185/255.255.255.0 broadcast 10.0.4.255    dev eth0 label eth0
/bin/ip link set dev eth0   up
 /bin/ip route add default via 10.0.4.1  dev eth0 onlink 
/bin/run-parts --exit-on-error --verbose /etc/network/if-up.d
run-parts: executing /etc/network/if-up.d/000resolvconf
run-parts: executing /etc/network/if-up.d/upstart