tlmgr-platform:tldr:3f75a
This command is a Linux command that uses the "sudo" command to run the "tlmgr platform add" command with a variable called "${platform}".
The "sudo" command is used to run a command with administrative privileges. It allows the user to execute commands that require superuser or root access.
The "tlmgr platform add" command is a command used in TeX Live, a popular typesetting system, to add a new platform to the TeX Live distribution. Platforms in TeX Live refer to different operating systems or architectures for which TeX Live has been built.
The "${platform}" variable is a placeholder for the name of the platform you want to add. You would replace "${platform}" with the actual name of the platform you want to add.
The overall purpose of this command is to add a new platform to TeX Live using administrative privileges.