Change hostname in Linux

change hostname on rhel5
#vi /etc/sysconfig/network
hostname:
save and exit
# vi /etc/hosts
edit
save and exit
#service network restart
#service xinetd restart
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Change hostname in Linux

First you need to find out your hostname, you can do this with

$ hostname

localhost.localdomain

$

Edit /etc/hosts

You need to edit /etc/hosts and add a line for your host name

$ cat /etc/hosts

# Do not remove the following line, or various programs

# that require network functionality will fail.

127.0.0.1               localhost.localdomain localhost

$

My new server IP is 72.232.196.90, i need to assign it hostname server12.hosthat.com, to do this, i have edited /etc/hosts as follows.

# Do not remove the following line, or various programs

# that require network functionality will fail.

127.0.0.1               localhost.localdomain localhost

72.232.196.90           server12.hosthat.com server12

Edit /etc/sysconfig/network

First lets see what is in the file

$ cat /etc/sysconfig/network

NETWORKING=yes

HOSTNAME=localhost.localdomain

$

To change servers hostname to server12.hosthat.com, change the file as follows.

$ cat /etc/sysconfig/network

NETWORKING=yes

HOSTNAME=server12.hosthat.com

$

Now you need to reboot the server to change the hostname.