Now, you can convert the .rpm to a .deb by using the Terminal (press Ctrl+Alt+T on your keyboard) or use copy/paste method: cd ~/Desktop (then hit Enter) This command will change the directory to your desktop, where you have the .rpm file. sudo alien -k apacheds-2.0.0-M11-i386.rpm  (then hit Enter) To use command like is: sudo alien -k name.rpm  (which will convert your .rpm package to .deb package) you need to replace 'name' with the name of your desired package. My is: apacheds-2.0.0-M11-i386.rpm. The password is that one, which you're using in the Login Screen. Password does not show up in the terminal when you type it. Just type your password and hit Enter. If your password was entered correctly, the action will continue.
For example, if you want to convert .rpm file, download the package to your Desktop. Type following command to the Terminal (press Ctrl+Alt+T on your keyboard) or use copy/paste method: When it asks you for password, don't be confused.