As part of my research work I have to study a rootkit. So I downloaded ncom rootkit and tried installing. It didnt have any installion files. Please help me in installing it.
First, how do you know it's not installed? That sounds frivolous, but it is a root kit, and it's job is to hide installed things. Believing that you have a rootkit installed on a system makes everything that system tells you suspect.
This page: http://www.aggro.it/files/papers/ncom.html hints a bit about how it's installed. Looks like you might be able to use the shared-object file on individual executables by exporting LD_PRELOAD set to the ncom .so file name.
It also looks like the file /etc/ld.so.preload might be a way to get it dynmically linked in every executable.