Difference between ls and rosls?
Difference between roscd and cd?
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PS: it would be nice if you could spent at least some time searching before asking such really basic questions.
We're here to help, so any question is welcome, but you'll even save yourself quite some time if you just google for these kind of things, instead of having to wait 7h for an answer.
rosls allows you to view the contents of a package, stack, or location.