LINUX OPERATION SYSTEM MANAGEMENT

14 May LINUX OPERATION SYSTEM MANAGEMENT

linux operation system management

1. Create a file named breeds and type in the following information:

echo “Enter the name of a breed of animal”

read breed

case $breed in

arabiam|palomino|clydesdale) echo “$breed is a horse”;;

jersey|guernsey|holstein) echo “$breed is a cow”;;

husky|shepherd|setter|labrador) echo “$breed is a dog”;;

siamese|Persian|angora) echo “$breed is a cat”;;

*) echo “$breed is not in our catalog”;;

esac

2. Save and exit the editor

3. Make the file breeds executable

4. Run the program 5 times, and give the output for each:

First try type: husky

Second try type: holstein

Third try type: clydesdale

Fourth try type: angora

Fifth try type: terrier

5. Type the following program into your editor, and then run it.

#!/bin/sh

clear

echo “Use one of the following options:”

echo “d To display the time and date”

echo “p To see what directory you are currently in”

echo “w To see a list of who is online”

echo “Enter your option and hit Enter: c”

read option

case $option in

a. date;;

p) pwd;;

w) who;;

*) echo “That was not a valid selection”;;

esac

echo “Good bye”

6. Explain what the program above accomplished:

7.

clear

echo “Type a letter from the Greek alphabet”

read letter

case $letter in

Alpha|alpha|ALPHA) echo “$letter is the first letter in the Greek alphabet”;;

Beta|beta|BETA) echo “$letter is the second letter in the Greek alphabet”;;

Gamma|GAMMA|gamma) echo “$letter is the third letter in the Greek alphabet”;;

OMEGA|omega|Omega) echo “$letter is the last letter in the Greek alphabet”;;

*) echo “$letter is not a letter in the Greek alphabet”;;

esac

Explain what the pipe symbol is doing in the above program.

8. Write your own case statement where the user can type the name of a Car Maker, and your program will give a response determined by you. For example:

Question: What Car Maker are you interested in?

User Response: Ford

Program Response: Ford is a good car

Do this for 4 different car makers. Also remember to include a catchall in case the user types in a car maker that does not exist.

9. Using your knowledge of the while loop, take the program from #5, and nest that case statement inside a while loop, so the case statement will keep on running until q is typed. I left spaces below where the parts of the while loop, and the interactivity between the user and the program would go (ex. asking the user to enter a new choice, and allowing for it).

Line 1: # Use a counter

line 2: clear

line 3: “Use one of the following options:”

line 4: echo “d To display the time and date”

line 5: echo “p To see what directory you are currently in”

line 6: echo “w To see a list of who is online”

line 6: echo “ Enter your option and hit Enter: c”

line 7: read option

line 8:

line 9:

line 10: case $option in

line 11: d) echo `date`;;

line 12: p) echo `pwd`;;

line 13: w) echo `who`;;

line 14: *) echo “That was not a valid selection”;;

line 15: esac

line 16:

line 17:

line 19:

line 20: echo “Good Bye”

10. Using the car maker script from number 8, add a while or an until to make it run over and over until the user types Q.