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Linux command to remove virtual interfaces or network aliases

September 8, 2019

Q. How do I remove virtual interfaces such as eth0:1 or eth1:1?

A. Use ifconfig command. It is used to remove virtual interfaces or network aliases.

Ifconfig is used to configure the kernel-resident network interfaces. It is used at boot time to set up interfaces as necessary. After that, it is usually only needed when debugging or when system tuning is needed.

Type the command to remove eth0:1:
# ifconfig eth0:1 down

/etc/sysconfig/network-scripts/ifcfg-ethX-range0 file

To remove interface permanently edit network configuration file stored at /etc/directory. For Red Hat / Fedora Core file stored in /etc/sysconfig/network-scripts/ directory. For Debian or Ubuntu Linux just edit file /etc/network/interfaces and remove the entries. For example open file called /etc/sysconfig/network-scripts/ifcfg-eth1-range0
# vi /etc/sysconfig/network-scripts/ifcfg-eth0-range0
You will see network aliases configuration:
IPADDR_START=192.167.1.5
IPADDR_END=192.167.1.100
CLONENUM_START=0
NETMASK=255.255.255.0

Just comment out everything or just rename the file:
# mv /etc/sysconfig/network-scripts/ifcfg-eth0-range0 /etc/sysconfig/network-scripts/working.ifcfg-eth0-range0.backup
Just restart network service:
# service network restart

Posted by: SXI ADMIN

The author is the creator of SXI LLC and a seasoned sysadmin, DevOps engineer, and a trainer for the Linux operating system/Unix shell scripting. Get the latest tutorials on SysAdmin, Linux/Unix and open source topics via RSS/XML feed or weekly email newsletter.

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