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I want to use latex inside WSL (Ubuntu 18.04 is what shows in my Apps and Features) because I want a linux-based install (to use bash scripts, etc.). I managed to install TeX Live following instructions for Installing TeX Live over the Internet. I have a /usr/local/texlive/2018 that is OK, and the latex commands, etc. work fine.

The trouble I have is with updates or installing other packages. tlmgr seems partially borked in WSL. For example, I want to install packages and fonts:

$ sudo tlmgr install collection-fontsrecommended

I get an error about Cannot find main repository, you have to tag one as main! (but there are also errors about missing xzdec).

So, I try to set the repository, and still get the xzdec error:

$ sudo tlmgr option repository http://mirror.ctan.org/systems/texlive/tlnet
(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.
tlmgr: Couldn't set up the necessary programs.
Installation of packages is not supported.
Please report to texlive@tug.org.
tlmgr: Continuing anyway ...
tlmgr: setting default package repository to http://mirror.ctan.org/systems/texlive/tlnet

Googling the xzdec package error, I found it can be installed with sudo apt-get install xzdec. But on my WSL I get the following:

$ sudo apt-get install xzdec
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Unable to locate package xzdec

Can xzdec be installed in WSL? What's the trick? More info about xzdec

Is TeX Live the best option for LaTeX under WSL?

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I solved the problem by updating my Ubuntu 18.04:

$ sudo apt-get update

It installed a bunch of stuff (I apparently have never done that since installing WSL from the Microsoft Store).

Afterwards, the $ sudo apt-get install xzdec succeeds, and so do the $ sudo tlmgr ... commands.

However, I'm now realizing there's a conflict with the default Ubuntu 18.04 installs of latex. Before you install TeX Live (2018), make sure you remove the default install first.

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