&& || –> DO NOT USE
1. Write test commands for the following
a. to check to see whether a variable named ROOM has the integer value 89
b. to check to see whether /etc/shadow is writable.
2. What is the meaning of character for grep/egrep.
3. Write egrep/grep RE for the following
a. Display lines that begin with root
b. Display lines that ends with root