How do I configure domain names in Cent OS?
I am actually connecting to the servers via SSH remote terminal and I also have root credentials. Does configuring the /etc/sysconfig/network and /etc/hosts suffice? Would be great to have some steps or configuration guides..
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_hostname at a command prompt to make the change effective.
Define the hostname in /etc/sysconfig/network to 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 domain yourdomain.com
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 /etc/resolv.conf.
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 command:
Use hostname -s to get the short name (should reflect what you have in /etc/sysconfig/network
Use the hostname -d command to test your domain (should reflect what you have in /etc/resolv.conf)
To test it all together, you can use hostname -f or hostname -A for the very long version.
