Configure domain name in CentOS
Four things to do:
Add the hostname entry to
/etc/hosts. Use the format detailed here.
If your hostname is "your_hostname", type
hostname your_hostnameat a command prompt to make the change effective.
Define the hostname in
/etc/sysconfig/networkto make this setting persist across reboots.
Reboot the system or restart services that depend on hostname (cups, syslog, apache, sendmail, etc.)
If by domain name you mean domain suffix, then
/etc/resolv.conf is where the domain goes. Just add a line
Then to set your server's hostname, there's only one good place for it, and it's
/etc/sysconfig/network. Add a line
HOSTNAME=yourhostname, and don't put the domain suffix in the hostname, as it will take it from
You do not need to add anything (and shouldn't) in
/etc/hosts to define your hostname. This is the wrong way to do it.
To test your setup, use the
hostname -sto get the short name (should reflect what you have in
hostname -dcommand to test your domain (should reflect what you have in
To test it all together, you can use
hostname -Afor the very long version.