How To Rename NIC In Linux (CentOS / RHEL 7 & 8)

LINUX SNIPPET

You will learn how to rename NIC in Linux without the need of editing UDEV file

How To Rename Network Interface Card (NIC) In RHEL / CentOS 7&8

1. verify the NICs on the system.

[root@HQPRD2 ~]# ip a

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host
       valid_lft forever preferred_lft forever
2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
    link/ether 00:0c:29:dc:f5:94 brd ff:ff:ff:ff:ff:ff
    inet 192.168.170.216/24 brd 192.168.170.255 scope global noprefixroute dynamic ens33
       valid_lft 1539sec preferred_lft 1539sec
    inet6 fe80::5353:948b:670:3326/64 scope link noprefixroute
       valid_lft forever preferred_lft forever
[root@HQPRD2 ~]#

2. Bring down the NIC you want to rename and verify that “state UP” has turned to “state DOWN”

[root@HQPRD2 ~]# ifdown ens33
[root@HQPRD2 ~]# ifconfig ens33 down

3. rename the NIC to the desired name. In my case, I will rename the NIC to “tekneed”

[root@HQPRD2 ~]# ip link set ens33 name tekneed

4. confirm it’s been renamed.

[root@HQPRD2 ~]# ip a

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host
       valid_lft forever preferred_lft forever
2: tekneed: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state DOWN group default qlen 1000
    link/ether 00:0c:29:dc:f5:94 brd ff:ff:ff:ff:ff:ff
    inet 192.168.170.216/24 brd 192.168.170.255 scope global noprefixroute dynamic ens33
       valid_lft 1539sec preferred_lft 1539sec
    inet6 fe80::5353:948b:670:3326/64 scope link noprefixroute
       valid_lft forever preferred_lft forever
[root@HQPRD2 ~]#

5. Rename the NIC configuration file in network-scripts directory

NOTE: You may or may not need this step

[root@HQPRD2 ~]# mv /etc/sysconfig/network-scripts/ifcfg-ens33 /etc/sysconfig/network-scripts/ifcfg-tekneed

6. Edit the NIC configuration file and replace the old device name with the new one as highlighted in yellow. Also make sure the “HWADDR” field is included

[root@HQPRD2 ~]# vi /etc/sysconfig/network-scripts/ifcfg-tekneed
how to rename a NIC in Linux

7. Bring up the renamed NIC.

[root@HQPRD2 ~]# ifconfig tekneed up
[root@HQPRD2 ~]# ifup tekneed

8. verify the NIC is up

[root@HQPRD2 ~]# ip a

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host
       valid_lft forever preferred_lft forever
2: tekneed: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
    link/ether 00:0c:29:dc:f5:94 brd ff:ff:ff:ff:ff:ff
    inet 192.168.170.205/24 brd 192.168.170.255 scope global noprefixroute dynamic tekneed
       valid_lft 1572sec preferred_lft 1572sec
[root@HQPRD2 ~]#

9. You may reboot your system to verify it is persistent across reboot.

[root@HQPRD2 ~]# reboot

This is how to rename NIC in Linux. This process may not apply for all Linux distributions though.

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