tlmgr-restore:tldr:822b3

The command "tlmgr restore --all" is used in the TeX Live Manager (tlmgr) utility to restore all the packages in TeX Live to their original state.

TeX Live is a comprehensive distribution of the TeX typesetting system that includes a wide range of packages and programs for creating and publishing documents. Over time, you may install or update packages, and sometimes there might be issues or conflicts between packages that can cause problems with your TeX installation.

In such cases, you can use the "tlmgr restore --all" command to revert all the packages in TeX Live back to their original state. This means that any packages you have installed or updated will be removed, and the TeX Live installation will be restored to the state it was in when you first installed it.

This command can be useful when you encounter problems with your TeX installation and want to start fresh by undoing any changes you have made. It effectively resets the TeX Live installation to its default configuration.

It's important to note that running this command will remove any additional packages or updates you have installed, so make sure to back up your work or save any customizations before running it.