Day2_answer_key.txt

# 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.