`pg_archivecleanup` - clean up PostgreSQL WAL archive files

pg_archivecleanup [OPTION]... ARCHIVELOCATION OLDESTKEPTWALFILE

Options you will use

-d: generate debug output (verbose mode).
-n, --dry-run: dry run, show the names of the files that would be removed.

Try pg_archivecleanup in a real terminal Free, in your browser - a real Ubuntu terminal to try it in, with missions that check your work.