Hello,

I just installed Ubuntu 14.04 LTS.  I have been following the instructions to instal x2goserver from here:
http://wiki.x2go.org/doku.php/wiki:repositories:ubuntu

My /etc/apt/sources.list has this line;

deb http://de.archive.ubuntu.com/ubuntu trusty main universe

I get this error message when trying to add the x2go/stable PPA while running as root.

# add-apt-repository ppa:x2go/stable

Cannot add PPA: 'ppa:x2go/stable'.

Please check that the PPA name or format is correct.

Thanks,

-Nate