We can't install .rpm package in ubuntu straightly. So we go to alien
Installing Alien :
You can install alien itself from the Ubuntu Universe repository by adding the repository to your list of sources and doing:
$sudo apt-get update
$sudo apt-get install alien
Installing the .rpm file :
To install the .rpm file, you first need to convert it to a .deb file which can be installed on Ubuntu.
I assume that you downloaded the package to your Desktop (~/Desktop is the directory)
You can convert the .rpm to a .deb by using the following commands.
$cd ~/Desktop-This will change the directory to your desktop, where you have the .rpm file.
$sudo alien -k name-of-rpm-file.rpm- This will convert the .rpm to a .deb.
- The “-k” will keep the version number. Otherwise alien adds a “1″ to the version number.
$sudo dpkg -i name-of-deb-file.deb- This will install the .deb package
* still not tried
* I get it from ubuntu forum