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sl: Let a steam locomotive run through your terminal.
$ sl
try on your machine

The sl command is a fun little utility that displays a moving train animation on the terminal. It is often referred to as the "steam locomotive" command.

When you execute the sl command, it will animate a train moving across the terminal screen, leaving a trail of smoke behind it. It is purely a joke command, not serving any practical purpose. It was initially developed as a prank to teach beginners the ls command (which lists files and directories in a directory), as the l and s keys are adjacent on a keyboard.

However, due to its popularity and humorous nature, it has become a well-known command in the UNIX/Linux community. It does not have any useful application, but it can provide a brief moment of entertainment for users.

This explanation was created by an AI. In most cases those are correct. But please always be careful and never run a command you are not sure if it is safe.
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