tlmgr-backup:tldr:66f15

The command tlmgr backup ${package1 package2 ---} is using the tlmgr utility in TeX Live, a popular system for typesetting documents in LaTeX. This command allows you to create a backup of specific TeX Live packages.

Here's a breakdown of the command:

• tlmgr is the command-line tool used to manage TeX Live packages.
• backup is the specific command within tlmgr to create backups of packages.
• ${package1 package2 ---} is a placeholder for the names of the packages you want to backup. You would replace ${package1 package2 ---} with the actual names of the packages you want to back up.

For example, if you wanted to backup the packages texlive-latex-extra and texlive-fonts-recommended, the command would look like this:

tlmgr backup texlive-latex-extra texlive-fonts-recommended

This command will create backup files for the specified packages, allowing you to restore them later if needed. It's a useful command to have in case you want to revert to a previous version of a package or preserve a specific package configuration.