Linux offers a range of options to check your system’s IP address. Besides GUI network manager based on the Linux distribution, there is a set of common CLI commands that are mostly supported across different distributions by default. So, we’ll be covering such commands.

ip Command

ip command has a lot of options. To list all network interfaces, use ip a command or specify the name of the network interface as shown below.

$ ip addr show eth0
6: eth0: mtu 1500 qdisc mq state UP group default qlen 1000
link/ether 00:15:5d:8c:b4:c4 brd ff:ff:ff:ff:ff:ff
inet brd scope global eth0
valid_lft forever preferred_lft forever
inet6 fe80::215:5dff:fe8c:b4c4/64 scope link
valid_lft forever preferred_lft forever

hostname Command

hostname command with -I flag can list down all IPs attached to your different network interfaces.

$ hostname -I

ifconfig Command

Like ip command, ifconfig used to be the default command for viewing/modifying network parameters in a Linux system though it is still supported by a lot of distributions. You can use ifconfig -a to view all network adapters and their IPs or to specify a specific network interface with ifconfig use:

$ ifconfig eth0
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
  inet  netmask  broadcast
  inet6 fe80::215:5dff:fe8c:b4c4  prefixlen 64  scopeid 0x20<link>
  ether 00:15:5d:8c:b4:c4  txqueuelen 1000  (Ethernet)
  RX packets 1339936  bytes 1152733066 (1.1 GB)
  RX errors 0  dropped 0  overruns 0  frame 0
  TX packets 393472  bytes 333379281 (333.3 MB)
  TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0