I'm an ubuntu newbie I just installed 10.10 and I don't know what I did but now to perform actions that required sudo privileges (open synaptic, mount device, run apt-get install, etc) the OS won't let me saying I dont have enough privileges, for example when I try to sudo apt-get install it tells me:
myusername is not in the sudoers file. This incident will be reported.
So I have to log in as su to do any on these things. I didn't have to do this before, I just used the regular root privileges but as I said I must have changed something un-intentionally.
Can anyone help me?
Thanks in advance!