tlmgr-conf
Manage the TeX Live configuration.
TLDR
Show the current TeX Live configuration
$ tlmgr conf
Show the current texmf, tlmgr, or updmap configuration
$ tlmgr conf [texmf|tlmgr|updmap]
Show only a specific configuration option
$ tlmgr conf [texmf|tlmgr|updmap] [configuration_key]
Set a specific configuration option
$ tlmgr conf [texmf|tlmgr|updmap] [configuration_key] [value]
Delete a specific configuration option
$ tlmgr conf [texmf|tlmgr|updmap] --delete [configuration_key]
Disable the execution of system calls via \write18
$ tlmgr conf texmf [shell_escape] [0]
Show all additional texmf trees
$ tlmgr conf auxtrees show