Questions related to the command line use of Linux. 

 16. Find all files under ~ whose content contain the keyword pizza OR PIZZA OR piZZa OR pizzA. Not all variations in case for 'pizza', but just the variations listed. 17. Find all files under the current directory whose extension is *.txt and use -exec to create a listing of each files inode number. 18. What command would I run to update the database of file names used by the locate command? 19. Find all files under the /tmp directory whose size is greater than 80 kilobytes. Use -exec and an appropriate command to delete these files. 20. Find all files under the current directory that are named 'taco' ignoring case.