I am a Ubuntu user for more than a year, and I have recently installed fedora also (multi-boot).
I've tried sudo but always gives this error:
'user is not in the sudoers file. This incident will be reported.'
I then used 'new login' to login as root and tried 'visudo' to edit the sudoers file.
Please tell me how to edit this file and how to save it as it opens for editing in the terminal.