No student may write or modify files in the course directory (/home/course/os09f6/) . You may only copy or execute files there as directed in the exercise problems. From now on, any student violating this (very simple) rule will receive a penalty.
ls -l /home/course/os09f6/ total 8 drwxr-sr-x 2 hitoshi os09f6 4096 Oct 8 15:26 Ex/ -rw-r--r-- 1 s1160110 os09f6 182 Oct 8 15:33 ex2.c
