tmlgr was not working in a typical manual (non-apt) install of TeXLive in Ubuntu.)
In Kubuntu, I used
install-tl --gui=text to make a basic install. That is, I prefer not to use the full install, and get the few packages I need as I need them (
PATH=/usr/local/texlive/bin/x86_64-linux:$PATH; export PATH
~/.profile (and reboot) so that my Linux can find
Here are the type of errors I get when trying to use
(running on Debian, switching to user mode!) cannot setup TLPDB in /root/texmf at /usr/bin/tlmgr line 5336.
Googling for this leads to a suggestion to use
Then I get
sudo tlmgr install parskip.sty (running on Debian, switching to user mode!) /usr/bin/tlmgr: Initialization failed (in setup_unix_one): /usr/bin/tlmgr: could not find a usable xzdec. /usr/bin/tlmgr: Please install xzdec and try again. Couldn't set up the necessary programs. Installation of packages is not supported. Please report to firstname.lastname@example.org. tlmgr: exiting unsuccessfully (status 1).
Okay, drum roll for the answer... as simply formulating the question carefully pointed me to an obvious next step, which seems to be the "terminal" of my problem.