ip addr show ip addr show if test "${ip_method}" = "dhcp"; then dhclient ${iface} elif test "${ip_method}" = "ip"; then ip addr show dev ${iface} | grep "inet " | (while read a b c; do ip addr del $b dev ${iface}; done) ip addr add ${ip} dev ${iface} fi ip addr show dev ${iface} | grep "inet " | (while read a b c; do ip addr del $b dev ${iface}; done) ip link set ${iface} down ip link set ${iface} up