What's the main reason I would need to send files from the command line? If this is for person-to-person sharing, the person on the receiving end has to know t

What's the main reason I would need to send files from the command line? If this is for person-to-person sharing, the person on the receiving end has to know the url that I sent it to - how is that normally accomplished? Usually the way that I send files to people is the same way that I would communicate to them that I have sent files, e.g. HipChat, email.