Excute a command as root

"sudo" and then the command should work, e.g.

sudo apt-get update

to update your repository info. If you type

sudo su

then you will basically switch to root user, i.e. you become the root user for that terminal session. If you still have problems, please post the terminal output of the case that's not working for you.

Hi Bernhard

Thanks a lot. I guess the problem has solved.

But: where is the difference between sudo and sudo su? I thought sudo will give root privileges. If this is correct sudo would be the same as sudo su. Or not?

Thanks for your answer.
Peter

Please note:
https://help.ubuntu.com/community/RootSudo#Misconceptions

Well, "sudo" is just for one command, then you go back to be the "normal" user. But if you type "sudo su" you will remain "root" until you type "exit". That means you can execute a number of root commands in a row (if necessary) without having to type "sudo" repeatedly.

Not to forget the manuals, e.g.
man sudo

http://manpages.ubuntu.com/manpages/intrepid/en/man8/sudo.8.html

Hi Bernhard

Thanks for the answer. Now I'm infomed *l.

Have a good time and be well.
Peter

Thanks, Sam!
Peter