topic Query on Command line argument in Operating System - HP-UX

Query on Command line argument

P Arumugavel — Tue, 19 Jul 2011 07:34:44 GMT

Hi Experts,

I am newbie to scripting. While I come through some docs, I crossed one topic called 'Arguments to Shell Programs". I am not able to understand that at all. If you could make me understand in a way, it would be highly appreciated.

$0 - The command name

$1 - The first argument

$2 - The second argument

$9 - The ninth argument

$# - The number of command line arguments

Please explain about above also.

Thanks in advance

Rgds...

Re: Query on Command line argument

Duncan Edmonstone — Tue, 19 Jul 2011 07:54:44 GMT

I guess google is broken again then?

There are so many shell script tutorials out there on the internet, any reply here is really just repetition

http://www.freeos.com/guides/lsst/ch02sec13.html

Seems like a pretty simple intro to command line arguments

Re: Query on Command line argument

Dennis Handly — Tue, 19 Jul 2011 10:51:57 GMT

Why not try it out for yourself?

$ your-script.sh p1 p2 p3 p4 p5 p6 p7

In your-script.sh:

echo "$0: args: $@"

echo "$0 has $# args"

echo "$1"

echo "$2"

Re: Query on Command line argument

James R. Ferguson — Tue, 19 Jul 2011 11:33:31 GMT

Hi:

The easiest way to learn is to read and *write*. Your scripts can be as simple as Dennis suggested. The important part is to practice. Where possible, run code that you see to discover how and why it works. An excellent source of good scripts and tutorials (including one germane to your question here) is:

http://www.shelldorado.com/

...http://www.shelldorado.com/goodcoding/cmdargs.htmland, specifically to this question:

Regards!

...JRF...