moritz@SGE:/$ tlmgr gui
Laden der lokalen TeX Live Datenbank
Das kann einige Zeit dauern, bitte warten!
You don't have permission to change the installation in any way,
specifically, the directory /usr/local/texlive/2010/tlpkg/ is not writable.
Please run this program as administrator, or contact your local admin.
Fertig.
moritz@SGE:/$ sudo tlmgr gui
Can't locate TeXLive/TLConfig.pm in @INC (@INC contains: /usr/local/bin/../../texmf/scripts/texlive /usr/local/bin/../../tlpkg /etc/perl /usr/local/lib/perl/5.10.1 /usr/local/share/perl/5.10.1 /usr/lib/perl5 /usr/share/perl5 /usr/lib/perl/5.10 /usr/share/perl/5.10 /usr/local/lib/site_perl .) at /usr/local/bin/tlmgr line 79.
BEGIN failed--compilation aborted at /usr/local/bin/tlmgr line 79.