sl:tldr:1cd85
sl: Let the train fly.
$ sl -F
try on your machine
The command "sl -F" is used on a Linux or Unix system to run the "sl" command with the "-F" option.
The "sl" command is a fun little program that displays an animated steam locomotive engine when executed on the command line. It is often used as a joke or as a way to make the terminal more entertaining. By default, the locomotive will traverse the screen once and then disappear.
The "-F" option, when added to the "sl" command, ensures that the steam locomotive keeps running on the screen until interrupted or terminated, rather than just making a single pass. This means that the animation will continue to be displayed until the user manually stops it.
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.