Alien is a computer program that converts between different Linux package formats. It supports conversion between Linux Standard Base, RPM, deb, Stampede (.slp) and Slackware (tgz) packages. A computer program is a collection of instructions that describe a task, or set of tasks, to be carried out by a computer. ... Linux package formats are the different file formats used to package software for various GNU/Linux distributions. ... The Linux Standard Base, or LSB, is a joint project by several GNU/Linux distributions under the organizational structure of The Free Standards Group to standardize the internal structure of Linux-based operating systems. ... RPM Package Manager (originally Red Hat Package Manager, abbreviated RPM) is a package management system. ... deb is the extension of the Debian software package format and the most often used name for such binary packages. ... A stampede is an act of mass impulse among herd animals or a crowd of people in which the herd (or crowd) collectively begins running with no clear direction or purpose. ... Slackware was one of the earliest Linux distributions, and is the oldest, and most UNIX-like, distribution still being maintained[1]. It was created by Patrick Volkerding of Slackware Linux, Inc. ... In computing, the tar file format is a type of archive file format: the Tape ARchive format. ...
Alien is a program that converts between the rpm, dpkg, stampede slp, and slackware tgz file formats.
Alien should not be used to replace important system packages, like sysvinit, shared libraries, or other things that are essential for the functioning of your system.
Alien use patterns examines who I think is using alien now, and this post gives some historical background.