I have it, but unsuccessfully:
/usr/local/texlive/2012 > ls -l
insgesamt 2420
drwxrwxr-x 3 root root 4096 Jun 5 21:47 bin
-rw-r--r-- 1 root root 602666 Mai 10 04:39 doc.html
-rw-r--r-- 1 root root 1157 Mai 31 2010 index.html
-rwxr-xr-x 1 root root 77490 Mai 10 15:52 install-tl
-rw-r--r-- 1 root root 720874 Jun 6 05:49 install-tl.log
-rw-r--r-- 1 root root 2098 Sep 28 2006 LICENSE.CTAN
-rw-r--r-- 1 root root 5086 Jun 5 2011
LICENSE.TL
-rw-r--r-- 1 root root 183 Aug 9 2008 README
drwxr-xr-x 2 root root 4096 Jun 6 04:56 readme-html.dir
drwxr-xr-x 2 root root 4096 Jun 6 04:56 readme-txt.dir
-rw-r--r-- 1 root root 250 Aug 9 2008 README.usergroups
-rw-rw-r-- 1 root root 360 Mai 28 2011 release-texlive.txt
drwxr-xr-x 18 root root 4096 Jul 3 20:14 texmf
-rw-r--r-- 1 root root 450 Jun 6 05:48 texmf.cnf
-rw-r--r-- 1 root root 528 Jun 6 05:48 texmfcnf.lua
drwxrwxr-x 3 root root 4096 Jul 3 20:14 texmf-config
drwxrwxr-x 19 root root 4096 Jul 3 20:15 texmf-dist
-rw-r--r-- 1 root root 1002509 Jul 3 19:33 texmf-local
drwxr-xr-x 7 root root 4096 Jul 3 20:15 texmf-var
drwxrwxr-x 9 root root 4096 Jul 9 17:32 tlpkg
/home/trine/Downloads > sh update-tlmgr-latest.sh -- --upgrade
Verifying archive integrity... All good.
Uncompressing TeX Live Manager
Updater..........................................................................................................................................................................
./runme.sh: updating in /usr/local/texlive/2012...
./runme.sh: tlmgr version says this is TeX Live 2011
./runme.sh: upgrading from 2011 to 2012.
tar: LICENSE.CTAN: Kann open nicht ausführen: Die Datei existiert bereits
tar:
LICENSE.TL: Kann open nicht ausführen: Die Datei existiert bereits
...
Christine