[root@server1 ~]# ip help Usage: ip [ OPTIONS ] OBJECT { COMMAND | help } ip [ -force ] -batch filename where OBJECT := { link | addr | addrlabel | route | rule | neigh | ntable | tunnel | maddr | mroute | mrule | monitor | xfrm } OPTIONS := { -V[ersion] | -s[tatistics] | -d[etails] | -r[esolve] | -f[amily] { inet | inet6 | ipx | dnet | link } | -o[neline] | -t[imestamp] | -b[atch] [filename] | -rc[vbuf] [size]}
To show the current configuration type:
[root@server1 etc]# ip addr show 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo inet6 ::1/128 scope host valid_lft forever preferred_lft forever 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000 link/ether 00:1e:2a:49:52:2c brd ff:ff:ff:ff:ff:ff inet 192.168.1.13/24 brd 192.168.1.255 scope global eth0 inet6 fe80::21e:2aff:fe49:522c/64 scope link valid_lft forever preferred_lft forever
[root@server1 etc]# ip addr add 192.168.1.11 dev eth0
[root@server1 etc]# ip addr del 192.168.1.11 dev eth0
To set de default gateway to 192.168.1.1 type:
[root@server1 etc]# ip route default via 192.168.1.1