The main Linux distributions that don’t support RPM are the Debian GNU/Linux family and Slackware Linux. To help with these distributions, you can use a package-conversion tool called alien.
Alien is a package that supports conversions between RPM and so-called alien package formats such as the dpkg (Debian GNU/Linux), slp (Stampede Linux), and tgz (Slackware Linux) formats.
You can use alien on your RPM-based Linux system to convert RPMs to some other format, such as the Debian dpkg. You can also use alien to convert other package formats into RPMs, depending on which way you need to go.