-prune - prunes (eliminates from search files/directories). Because it returns true, use -o option to add actions for anything else. find -name evals -prune -o -name backups -prune -o -size +20k -a -name "*.txt" -print 2> /dev/null | less

-a AND - test for success of test-condtion.

-o OR - test for failure of test-condition. find . \! -name "backups" -a \! -name "evals" -print find . \! \( -name backups -o -name evals \) -print These 2 are the same. But they are different from the prune example. These will print every files except files named backups or evals Because both ! and () are shell expressions, using backslash is recommended.