I have a very similar problem as discussed in the post TEX564734. I am on ubuntu 20.04 and the installation via
sudo apt install texlive installed a debian version in the folder
/usr/share/texlive. The installed version is texlive 2019 (issuing
pdflatex I get
Version 3.14159265-2.6-1.40.20 (TeX Live 2019/Debian).
I then executed:
however when I then try to install a new packages I get:
unexpected return value from verify_checksum: -5
In a different post, TEX537810, I saw that a solution is to update
tlmgr but that does not work either.
/ which does not seem right. Indeed when I tried
sudo env PATH="$PATH" ./update-tlmgr-latest.sh i get an error
./runme.sh: Cannot find TeX Live root using kpsewhich --var-value=SELFAUTOPARENT.. I added to the
PATH the director
/usr/share/texlive. Maybe that's not sufficient given the Debian version? This director is the first in the
tlmgr repository list provides two repos
http://contrib.texlive.info/current (tlcontrib) and
tlmgr key list reports a key that does not seem to have any expiration date
rsa2048 2016-03-19 [E] plus another one I added from the repo maintained by Norbert Preining (
tlcontrib) that has expiration date 2021-03-01.
At this point I am not sure what do to next to be able to install packages.