Quote Originally Posted by venky_gec
I'm using Knopix Live cd 3.3

i wanted to install some program
Knoppix is a Live CD. Great for quickly running Linux on most machines and for a introduction to Linux. Not great for installing other software. The version that you are using is very old, and the limited support for installing stuff that is in newer versions is not there. But if your goal is to install software and retain settings between boots then I really recommend lookming at a real Linux hard disk install such as Debian Etch (or any of many other Linux versions intended for loading to hard disk and installing other software), not Knoppix.