List Installed Package on Linux

This is a personal note about how to show list of installed packages on a Linux system.

There are different CLI commands depending on what kind of Linux operating system you use.

• Ubuntu / Debian

For Ubuntu, and Debian users, use this command to check installed packages on your system :

dpkg --get-selections | less

or

apt list –installed

• RHEL/Fedora/CentOS

For RHEL (Red Hat), Fedora, and CentOS users use this command to check installed packages on your system :

rpm -qa | less

or

yum list installed | wc -l

• FreeBSD

For FreeBSD users can use this command to check installed packages on your system :

pkg_info | less