I ran the following program. I don't understand some of it.

#!/bin/sh
case $1 in
--test|-t)
echo "you used the --test option"
exit 0
;;
--help|-h)
echo "Usage:"
echo " myprog.sh [--test|--help|--version]"
exit 0
;;
--version|-v)
echo "myprog.sh version 0.0.1"
exit 0
;;
-*)
echo "No such option $1"
echo "Usage:"
echo " myprog.sh [--test|--help|--version]"
exit 1
;;
esac

echo "You typed \"$1\" on the command-line"

-----------------------------------------------------------------------------

Do I need a program called '' myprog.sh '' to run this program?

I got the following message when running it.

You typed "" on the command-line.

The name of the program is '' temp25 '' .


[nissanka@c83-250-111-20 ~]$ chmod 755 temp25
[nissanka@c83-250-111-20 ~]$ ./temp25
You typed "" on the command-line

--------------------------------------------------
I have a file called '' Cisco ''

[nissanka@c83-250-111-20 ~]$ ./temp25 Cisco
You typed "Cisco" on the command-line
[nissanka@c83-250-111-20 ~]$


Could you please tell me how to run this program and how it works?

please use suitable thread titles in future. i'd suggest reading the bash scripting howto to actually understand what's going on there. if you don't know bash, i don't see why you'd need to know what this even does... it's just some example script for using a case statement. it doesn't "do" anything, and myprog.sh is just what the example file itself would be called.

Hi, Gins -

Like acid_kepie said, the script you found, "temp25", is just an example that shows you how to parse command line parameters from a shell script. It doesn't actually "do" anything (except, of course, echo back the parameters you typed in).

Not only that, but the method they use for parsing the command lnie parameters (a shell "case" block) isn't even the only way to do it. Or even the best way (for example, that particular case switch might crash if you don't type in any arguments).

'Hope that helps ...

I thank both of you for the replies.

acid_kewpie, what do you mean by a suitable title here?

what is "your help" supposed to mean?? what was wrong with somethign useful like "What does this example bash script do?" or something??

Thanks acid_kewpie

I am learning those scripting using some online resources nowadays. I will be posting more questions. I would try to write sensible heading which fullfills your requirement.

Those scripting is a tall order to me.