[tex-live] Where is the root dir of my Tex Live installation

[Gerald Pechoc]

I need that to install tlmgr.

I have Ubuntu 12.04 LTS and tex live directly from the net installed.
Now I wanted to install from the net the tlmgr (Package Manager) because
there is no one and this goes like that:

./runme.sh: Cannot find TeX Live root using kpsewhich
--var-value=SELFAUTOPARENT.
./runme.sh: Please call update-tlmgr-latest.sh --noexec --keep
./runme.sh: and then call the runme.sh script in the unpacked directory
./runme.sh: with the directory root as the first argument, something like:
./runme.sh: sh runme.sh /path/to/your/texlive/installation/2010
pechoc at bmeson-a:~/Downloads$ sudo ./update-tlmgr-latest.sh --noexec --keep
Creating directory tmp.OqU66gUxij
Verifying archive integrity... All good.
Uncompressing TeX Live Manager
Updater..........................................

And how can I find the root of the installation ?
to provide
sh runme.sh /path/to/your/texlive/installation/2013
?????

Please help!
Gerald