If you prefer doing things from the command line, transfer.sh (no, that’s not a script, it’s a website) is for you. Using it, you can easily share a file from the command line, without installing anything. Well, cURL or Wget are required, but you probably already have them installed. The service is free, allows uploading files up to 10 GB in size, and it stores the files for 14 days. In my test, it was also very fast.