CentOS: prevent eth0 from starting at boot time


On a CentOS server we own, we had to disable eth0 from starting at boot time
To do so we needed to modify the file /etc/sysconfig/network-scripts/ifcfg-eth0 and set the value ONBOOT="yes" to ONBOOT="no".

Using you favorite text editor, make this change and restart your machine to verify that the change was successful.

Below is the sample content of /etc/sysconfig/network-scripts/ifcfg-eth0 after the change was applied to prevent eth0 from starting at boot time.

  GNU nano 2.3.1                File: /etc/sysconfig/network-scripts/ifcfg-eth0                             Modified

TYPE="Ethernet"
 BOOTPROTO=dhcp
 DEFROUTE="yes"
 IPV4_FAILURE_FATAL="no"
 IPV6INIT="yes"
 IPV6_AUTOCONF="yes"
 IPV6_DEFROUTE="yes"
 IPV6_FAILURE_FATAL="no"
 NAME="eth0"
 UUID="792d6842-221d-5c99-ba98-cddbba4ff263"
 ONBOOT="no"
 HWADDR="00:AA:5D:01:22:2B"
 DNS1="10.15.10.5"
 DOMAIN="bytefreaks.local"
 IPADDR=10.15.10.249
 PREFIX=24
 GATEWAY=10.15.10.1
 PEERDNS=yes
 PEERROUTES=yes
 IPV6_PEERDNS=yes
 IPV6_PEERROUTES=yes
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