How to copy a printer driver from one computer to another?

Use backup and restore option in Print Migrator 3.1 to take one printer from one server to another windows machine.

Download from here
http://www.microsoft.com/download/en/details.aspx?id=25311

How to delete duplicate lines along with its original in a text file?

Here is a way to delete repeated duplicate lines along with its original in a text file. If there are two lines with same string in it,it will remove both.
Finding double entries and delete both of them in a text file.
Do it in unix.
sort filename | uniq –u
Out put to a text file.