Unix Assignment

Question 1. Explain the function of break and continue commands in UNIX/Linux.

Question 2. Name two commands that are used in bash script to perform arithmetic calculations. Describe the difference between them.

Question 3. Explain what is happening in Lines 1, 4, 9, and 18. What is the output of this operation?

Line 01: $ x=5

Line 02: $ y=3

Line 03: $

Line 04: $ if [ $x -lt $y ]

Line 05: > then

Line 06: > echo " "

Line 07: > echo " ${x} is less than ${y}"

Line 08: > echo " "

Line 09: > elif [ $x -eq $y ]

Line 10: > then

Line 11: > echo " "

Line 12: > echo " ${x} is equal to ${y}"

Line 13: > echo " "

Line 14: > else

Line 15: > echo " "

Line 16: > echo " ${x} is greater than ${y}"

Line 17: > echo " "

Line 18> fi

Question 4. Which of the following programming constructs can be used in a bash shell script:

a. ifdo statement

b. case command

c. for...do loop

d. whiledo loop

e. untildone loop