[ubuntu-users] Command not found

[John Sampson]

Hello -

I am new to Ubuntu, being a Windows user. I am accustomed to
running batch files by typing their names in a shell. When I try
this in Ubuntu 11.10 there is a 'command not found' error.
I found that the file has to be in a folder in the path for it to be
runnable from a shell. I attended to this by copying the file to
'/usr/bin' and also navigated to '/usr/bin' before tryng to run it.
I typed 'ls <filename>' to ensure that the file was present.
I tried prefixing with 'sudo' and checked the spelling of the file
name. Does it have to have a special suffix or anything? I cannot
think of any other solution to this. Any advice will be welcome.

Also is there a brief basic account of the differences between
Ubuntu and Windows for reluctant users like myself who only
use Ubuntu because the program they want to use won't run
in Windows?

Regards

_John Sampson_