pacman-key:tldr:f314a

This command is used on a system that uses the package manager 'pacman' (such as Arch Linux) and the 'sudo' command for executing administrative tasks.

Here is a breakdown of each part of the command:

• 'sudo': It is a command that allows a user with administrative privileges to execute a command as the superuser or another user.
• 'pacman-key': This is the pacman subcommand used for managing the package manager's keyring. The keyring is used to verify the authenticity and integrity of packages before installation.
• '--delete': This option is used to delete specific keys from the keyring.
• '"${select}"': It is a variable that holds the name or fingerprint of the key you want to delete. It is enclosed in double quotes to preserve spaces or special characters.

So, when you execute this command, it will delete the specified key from the pacman keyring. The key can be identified either by its name or its fingerprint.