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?