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.