fetch-ebook-metadata(1) on Linux
The text 37ff0ec163a4, as Debian 12 (Bookworm) shipped it.
fetch-ebook-metadata Fetch book metadata from online sources. You must specify at least one of title, authors or ISBN. Whenever you pass arguments to fetch-ebook-metadata that have spaces in them, enclose the arguments in quotation marks. For example: "/some path/with spaces"