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Red-Hat-Enterprise-Linux-How-do-I-change-my-hostname

Red Hat Enterprise Linux How do I change my hostname.

Tools that we can use to change the hostname.

This procedure also works for a standalone system without a DNS subsystem.

setup - A text mode system configuration tool

redhat-config-network command

You can also run the redhat-config-network command in the Red Hat Enterprise Linux 3 and run system-config-network command in the Red Hat Enterprise Linux 4 and 5 , click on the "DNS" tab, and change the "Hostname" field.

/etc/sysconfig/network

1. IP hostnames or machine names can be changed dynamically with the command hostname and persistently by setting the HOSTNAME environment variable in /etc/sysconfig/network.

Steps.

1. Change the ^HOSTNAME line in /etc/sysconfig/network

2. Change the hostname (FQDN and alias) in /etc/hosts

3. Run /bin/hostname new_hostname for the hostname change to take effect immediately.

4. Run /sbin/service syslog restart for syslog to log using the new hostname.

A reboot is not required to change the system hostname.     

Example:

[root@localhost ~]# cat /etc/hosts
127.0.0.1		localhost.localdomain localhost
::1		localhost6.localdomain6 localhost6


[root@localhost ~]# cat /etc/sysconfig/network
NETWORKING=yes
HOSTNAME=localhost.localdomain
NTPSERVERARGS=iburst
[root@localhost ~]#