tlmgr-shell
Start an interactive shell of the native TeX Live manager.
TLDR
Start an interactive shell of tlmgr
$ tlmgr shell
Run any tlmgr sub-command in the interactive shell
$ [sub_command] [arguments]
Quit the interactive shell
$ quit
List all TeX Live variables
$ get
Get the value of a TeX Live variable
$ get [variable]
Set the value of a TeX Live variable
$ set [variable] [value]
Restart the interactive shell
$ restart
Print the version of the current protocol
$ protocol