Tech Tip: How to Copy a Remote File on rsync.net
rsync.net is a good service (and a not too pricey one) for remote storage of data (for backups/etc.) based on open protocols and open source applications. One thing that bugged me there however, was that I couldn't find a way to copy a remote file to a different name, because the SFTP client does not support a copy operation, and because I could not get to a login shell by sshing my rsync.net account. Apparently, it's doable and not very hard.
What you need to do is type
ssh email@example.com cp [source filename] [destination filename] and
it will run the remote UNIX "cp" command to copy the file. You can access
some other remote UNIX commands like that such as "ls".
Hope it helps.