I have admin privilege on my office computer (running RHEL 6) which is connected in a network. I was trying to install development tools using the command:
sudo yum groupinstall "Development Tools" but I got an error message saying:
Updating certificate-based repositories. There was an error communicating with RHN. RHN Satellite or RHN Classic support will be disabled. Error Message: Please run rhn_register as root on this client Error Class Code: 9 Error Class Info: Invalid System Credentials.
I tried to run rhn_register, it said
"It appears this system has already been registered for software updates".
What is the problem actually?