How to Check IP Address on Linux Command Line

How to Check IP Address on Linux Command Line. Mostly all of the Linux and Unix operating systems provides ifconfig and ip binary files. You can simply use these commands to find the local system IP address.

• Read: 5 Commands to Get Public IP using Linux Terminal

Method 1# Using ifconfig Command

ifconfig command is generally available under /sbin directory. So you will need root or sudo access to run this on many of operating systems.

$ ifconfig

Sample output

eth0      Link encap:Ethernet  HWaddr 00:0C:22:83:79:A3
          inet addr:192.168.10.199  Bcast:192.168.1.255  Mask:255.255.255.0
          inet6 addr: fe80::20c:29ff:fe89:79b3/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:3931508 errors:0 dropped:0 overruns:0 frame:0
          TX packets:1333146 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:706273621 (673.5 MiB)  TX bytes:857722605 (817.9 MiB)
          Base address:0x2000 Memory:fd5c0000-fd5e0000

lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:654 errors:0 dropped:0 overruns:0 frame:0
          TX packets:654 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:90459 (88.3 KiB)  TX bytes:90459 (88.3 KiB)

As per above output, this system has ip address 192.168.10.199 on ethernet interface eth0.

You can also view the specific interface details using below command

$ ifconfig eth0

Also you can specifiy full command path in case of command is not available under PATH environment.

$ /sbin/ifconfig eth0

• Read: bash ifconfig: command not found on CentOS/RHEL 7

Method 2# Using ip Command

ip command generally available under /bin directory but some Linux os keep is under /sbin directory. Use the following command to get ip address using ip command.

# ip addr show

Sample output:

1: lo:  mtu 16436 qdisc noqueue
    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:  mtu 1500 qdisc pfifo_fast qlen 1000
    link/ether 00:0C:22:83:79:A3 brd ff:ff:ff:ff:ff:ff
    inet 192.168.10.199/24 brd 192.168.1.255 scope global eth0 
    inet6 fe80::20c:29ff:fe89:79b3/64 scope link
       valid_lft forever preferred_lft forever
3: eth1:  mtu 1500 qdisc pfifo_fast qlen 1000
    link/ether 00:0c:29:89:79:bd brd ff:ff:ff:ff:ff:ff
4: sit0:  mtu 1480 qdisc noop
    link/sit 0.0.0.0 brd 0.0.0.0

As per above output, this system has IP address 192.168.10.199 on ethernet interface eth0. The interface eth1 doesn’t configure with any IP address.

You can also view the specific itnerface details using below command

# ip addr show eth0