Add a torrent by the .torrent file, or a magnet link, like this:
> transmission-remote -a 'magnet:?xt=urn:btih:05547db7c0c5fbbe50f00212ee43e9cec5b006fa&dn=Sita+Sings+the+Blues+%281080P+official+release%29&tr=udp%3A%2F%2Ftracker.leechers-paradise.org%3A6969&tr=udp%3A%2F%2Ftracker.openbittorrent.com%3A80&tr=udp%3A%2F%2Fopen.demonii.com%3A1337&tr=udp%3A%2F%2Ftracker.coppersurfer.tk%3A6969&tr=udp%3A%2F%2Fexodus.desync.com%3A6969'
> transmission-remote -a sita.torrent
Now let's check that the torrent's been added successfully.
> transmission-remote -l
To see the torrents, go to /var/lib/transmission/Downloads
If you don't have permission, either add the directory to the group made for your username, or add yourself to the `:transmission` group, or otherwise make sure that you can read that directory, and the user `transmission` can read, write and execute.