There is no texlive package manager in Ubuntu 10.4 even if the version of texlive is 2009. Is there some package which should be installed?
tlmgr is unavailable in package managers because using it to update TeX packages could potentially break future updates through apt. See this and this. One possible solution is to get tlmgr to manage packages installed in TEXMFHOME but there's still work to be done on that front.