Protection Bits for Files
drwx--S--- 2 menasce 512 Nov 4 13:49 grades/
-rw-rw-r-- 1 menasce 684 Nov 4 13:48 project_ideas
-rw------- 1 menasce 509 Nov 4 13:48 student_mail
-rw-r--r-- 1 menasce 3063 Nov 4 13:49 syllabus
entry type (- file; d directory)