Linux utils that you might not know covers a few Linux command line utilities that aren’t very famous:
- column, for “columnating” lists, which is very useful for display of table-like data (think CSV, for example);
- cal, for displaying calendars;
- factor, for calculating factors;
- numfmt, for formatting numbers and converting them to/from human-readable formats;
- shred, for overwriting the content of a deleted file, making it much more difficult to recover.