How Do I Know What Software Is Installed in Debian?

How do I find out what software is installed on Linux?

4 Answers

1. Aptitude-based distributions (Ubuntu, Debian, etc): dpkg -l.
2. RPM-based distributions (Fedora, RHEL, etc): rpm -qa.
3. pkg*-based distributions (OpenBSD, FreeBSD, etc): pkg_info.
4. Portage-based distributions (Gentoo, etc): equery list or eix -I.
5. pacman-based distributions (Arch Linux, etc): pacman -Q.

How do I know what packages are installed on Debian?

List Installed Packages with dpkg-query. dpkg-query is a command line that can be used to display information about packages listed in the dpkg database. The command will display a list of all installed packages including the packages versions, architecture, and a short description.