How to install non rpm software
 

I am not installing softwares like Evolution which i got like a package not a form of .rpm format.So how could i install it...

We would like to help but the wording of your question makes it really hard. But here goes. If you are trying to install an rpm on a non rpm based distro then you will have to use tools like alien for debian which will convert the rpm package into debian packages. Try searching for rpm converter for what ever distrobution you use.

install alien and then convert the required package into .rpm or .deb


after installing alien on your system. get help by "man alien" and see further syntax to convert..

Cheers!!!

While that would work, alien is not on every system. For all we know he could be using gentoo or someother distro besides debian which is what alien runs on.

Sounds like your system uses RPM's and what you have is NOT an RPM. maybe a .tgz file ?

Why don't we start with you posting toe following information before we all start taking wild guesses.. For all I know the first two responses are correct, but then again maybe not..

What Linux Distribution are you running ?

What pierce of software are you trying to install and where did you get it from (link would be helpful)