 
            
        tlmgr-platform:tldr:21c13  
        This command is used to remove a specified TeX Live platform using the tlmgr package manager, with elevated privileges granted by the sudo command (used in Unix-like operating systems).
Here is a breakdown of the command:
- 
sudo: It is a command that allows a user to run programs with the security privileges of another user, typically the superuser (root). By using sudo, the user gains elevated privileges required to perform system-level tasks.
- 
tlmgr: It is the package manager for TeX Live, a comprehensive TeX distribution. tlmgr allows users to install, update, and manage packages for TeX Live.
- 
platform: It is a placeholder representing the platform name you want to remove. To execute this command, you need to replace${platform}with the actual name of the platform you wish to remove.
- 
remove: It is the subcommand in tlmgr that instructs the package manager to remove the specified TeX Live platform.
Putting it all together, the command sudo tlmgr platform remove ${platform} is used to instruct the tlmgr package manager, with root privileges (using sudo), to remove the specified TeX Live platform. The actual platform name must be provided in place of ${platform}.