how to write shell script for partition usb pen drive using fdisk cmd?

[spymate]

i am trying to write a shell script for making partiton in usb pen drive 1GB capacity using fdisk command
but i am not able to pass the paremeters (like P or size to partition) in script which are required by fdisk command.
so please can any one tell me how to write the shell script in red hat linux 9.2-2.6.20 kernel


please revert
thanks in advance

[wje_lf]

When I do this at the command line:

man fdisk

I get back the instructions for using fdisk. Those instructions include this:

BUGS
       There are several *fdisk programs around.  Each has its
       problems and strengths.  Try them in the order cfdisk,
       fdisk, sfdisk.  (Indeed, cfdisk is a beautiful program
       that has strict requirements on the partition tables it
       accepts, and produces high quality partition tables. Use
       it if you can.  fdisk is a buggy program that does fuzzy
       things - usually it happens to produce reasonable results.
       Its single advantage is that it has some support for BSD
       disk labels and other non-DOS partition tables.  Avoid it
       if you can.  sfdisk is for hackers only - the user inter-
       face is terrible, but it is more correct than fdisk and
       more powerful than both fdisk and cfdisk.  Moreover, it
       can be used noninteractively.)

You have several choices here. My two favorites:

1. Use sfdisk. Be very careful. This is not for the faint of heart. I've never used sfdisk, but it seems to be suited for use in a script. For more information, do this at the command line:
   

   man sfdisk

2. Use cfdisk. I've always liked that one. It doesn't lend itself to a script very well, but you can get around that by performing two steps:
   
   1. Use it interactively for a while until you're extremely familiar with what you want to do, and how you would ask cfdisk to do it interactively.
   2. Learn how to use the program "expect". This program lets you do things in a script with programs which can normally be used only interactively. You say to it, "expect this on the 'screen' and then enter this other stuff on the 'keyboard'" -- all in a script. For more information, do this at the command line:
      

      man expect

      You can also read the wikipedia article on expect. There are some very useful links at the bottom of that article.
      
      You can also google
      

      expect tutorial

      if you wish.

Hope this helps.