Unfortunately, Ubuntu can’t run .rpm install files, so you need to use terminal to install alien to use in terminal to convert .rpm files to .deb install files, so you can install the progrm in ubuntu.
You need to be log in as a root user or an administer account to install programs.
1. Start the terminal Command prompt program in Ubuntu at Â Applications, Accessories and Click Terminal short cut .
2.type “~$ sudo apt-get install alien” without theÂ qoutes and type your rootÂ passwordÂ pressÂ enter andÂ type Y.
3.Â put the .rpm file is in your userÂ folder in Ubuntu.
4. Type :
$sudu alien -k nameoffile.rpm
5. deb file generated if you type in everything correct.