Errors in System Configuration

Nope, you would need to edit /etc/sysconfig/network and put your hostname in there:

HOSTNAME=myname.mydomain

In addition, it would probably be a good idea to add it to /etc/hosts like this:

127.0.0.1 myname.mydomain myname localhost.localdomain localhost

Edit: These changes would only take effect after a reboot. To make the hostname change immediately, use the hostname command after you change the files:

$ hostname myname.mydomain

Nope, you would need to edit /etc/sysconfig/network and put your hostname in there:

HOSTNAME=myname.mydomain

In addition, it would probably be a good idea to add it to /etc/hosts like this:

127.0.0.1 myname.mydomain myname localhost.localdomain localhost

Edit: These changes would only take effect after a reboot. To make the hostname change immediately, use the hostname command after you change the files:

$ hostname myname.mydomain