bug is a simple tracking system for console users. It only depends on common Unix commands. bugs database format is a text file containing simple tabbed columns which can be even hand-edited.
It uses $EDITOR for submitting or editing the issues and for changing states or priorities. It relies on four fixed fields: ID, Priority, State, and Subject.
There is also a fifth free-text field for any other information you may want to store about the issue. There is no database locking or notifications, so it's mostly for tracking the user's own issues.