# Day 2 self-learning Exercises ## Permissions If ls -l myfile.php returns the following details: -rwxr-xr-- 1 caro zoo 2312 2014-10-25 18:30 myfile.php Which of the following statements is true? 1. members of caro (a group) can read, write, and execute myfile.php 2. members of zoo (a group) cannot execute myfile.php 3. caro (the owner) can read, write, and execute myfile.php Answer: The third statement is true. ## Environment Variables Are the directories listed by the which command within $PATH? Answer: It should be. For example, if you would like to check the directory of command `pwd` - the output for `which pwd` is `/usr/bin/pwd`, and `/usr/bin` is within $PATH.