These should run in any Bourne-like shell. I develop on Ubuntu using dash. Please let me know if you run into something calling itself sh where the script doesn't work.
Rename files downloaded by uberdownloader.
To run,
sh rename-ogs.sh
This will rename files matching the pattern OGS_game_*.sgf.
If the file is an SGF file, it will extract the date and the players' names.
The new file will be named OGS-<date>-<game number>-<black player>-<white player>.sgf.
NOTE: If the file is not SGF, the results are unpredictable.