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Knoppix Commands

Hello experts, I am trying to go through a series of exercises to help me understand Linux running on a Live CD of Knoppix. Can you help with the commands I need to utilize?


  2. Create a shell script in your home directory.
  3. Convert the following pseudocode into code for the script:
        Read in three grades from the keyboard
        Average the grades
        Display the appropriate letter grade for the number grade using
this scale:
            90 to 100: Display a letter grade of "A"
            80 to 89: Display a letter grade of "B"
            70 to 79: Display a letter grade of "C"
            65 to 69: Display a letter grade of "D"
            0 to 64: Display a letter grade of "F"
        Insert appropriate comments
  4. Save the script, quit the editor, and then make the script
executable.
  5. Execute the script and then input 100, 90, and 100 when prompted
for each grade.
  6. Record the output.
  7. Execute the script again.This time input 99, 68, and 70 when
prompted for each grade.
  8. Record the output.
  9. Execute the script one last time. Input 80, 96, and 72 when
prompted for each grade.
10. Record the output.
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mayan1
Asked:
mayan1
1 Solution
 
Duncan RoeSoftware DeveloperCommented:
This is homework, right? All the same, here are the tools you would use
2. with a text editor, such as vi or emacs. Use chmod to make the script executable
3. Use bash's "read" command - bash has help for its internal commands so you can type e.g. "help read" at the shell prompt. "man bash" or "info bash" gives you he full works, including how to do arithmetic.
4. see 2.
5. You can always invoke a script by pathname (e.g. ./script) even if . is not in your PATH
6. Look up output redirection
7. see 5.
8. see 6
9. see 5
10. see 6

good luck ;)
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mayan1Author Commented:
I just wanted to see examples of how these are invoked. It does have to be exactly as stated but examples.
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nociSoftware EngineerCommented:
PLease read this first....
http://www.experts-exchange.com/Programming/Programming_Platforms/Linux_Programming/help.jsp#hi130

Then following up on the above leads should help, if you don't under stand them then try to find
& read the resp. manual pages. Trust me it doesn't hurt to read documentation..., dropping them on your toes might
if they're of the paper type.


These might help
http://www.oreilly.com/catalog/1593270348/index.html
http://www.oreilly.com/catalog/1593270313/index.html

This is a gem:
http://www.oreilly.com/catalog/knoppixhks/index.html

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