Unix Shell Scripting

What are the best online resources for compiling and editing Unix Shell Scripting?
Also, is there source from where I can download an ISO image file and hence make a bootable pen-drive containing UNIX?

There are not much online resources but few are:-

http://www.compileonline.com/execute_ksh_online.php

I advise that you practice in a proper environment if you are serious about it.

Also unix is not free but you can use any distribution of linux and almost all the sites have a tutorial on how to make a bootable pen drive.

Here are some links :-

Ubuntu

Fedora:-

https://fedoraproject.org/wiki/How_to_create_and_use_Live_USB

How to choose best linux distro visit this :-

If you want to do shell scripting using windows environment [though i donot advise it] , check this :-

thanks buddy for your time…
thank you…