transmission-edit(1)

Usage

transmission-edit [-h] [-a url] [-d url] [-r search replace] [-s source] torrentfile(s)

transmission-edit command-line utility to modify .torrent files' announce URLs

-h --help: Show a short help page and exit.
-a --add URL: Add an announce URL to the torrent's announce-list if it's not already in the list
-d --delete URL: Remove an announce URL from the torrent's announce-list
-r --replace search replace: Substring search-and-replace inside a torrent's announce URLs. This can be used to change an announce URL when the tracker moves or your passcode changes.
-s --source source: Set the source tag within a torrent

Update a tracker passcode in all your torrents:

$ transmission-edit -r old-passcode new-passcode ~/.config/transmission/torrents/*\.torrent

8 releases since Debian 7 (Wheezy); the text changed 3 times.

--source since Debian 13 (Trixie); -s since Debian 13 (Trixie).