Install rpm packages in debina system:

First you have to install the alien package in your system

$sudo apt-get install alien

Convert the rpm package to deb

$sudo alien name_of_file.rpm

This will convert the rpm package to debian package , then using the following command you can install that package in your system

$sudo dpkg -i name_of_file.deb

Extract rpm file in debian system

To extract all of the files in a rpm package give the following command

$rpm2cpio package.rpm | cpio -dimv