Show all installed packages or software in Linux, FreeBSD, OpenBSD

Q. I am using CentOS how do I show all installed packages in Linux?

A. You need to use rpm command to display all installed packages in Linux.

Red Hat/Fedora Core/CentOS Linux

Type the following command to get list of all installed software
# rpm -qa | less

Debian Linux

Type the following command to get list of all installed software:
# dpkg --get-selections

Ubuntu Linux

Type the following command to get list of all installed software:
# sudo dpkg --get-selections

FreeBSD

Type the following command to get list of all installed software:
# pkg_info | less
# pkg_info apache

Use pkg_version command to summarizes the versions of all installed packages:
# pkg_version | less
# pkg_version | grep 'lsof'

OpenBSD

OpenBSD also use pkg_info command to display list of all installed packages or software:
# pkg_info | less
# pkg_info apache

Posted by: SXI ADMIN

The author is the creator of SXI LLC and a seasoned sysadmin, DevOps engineer, and a trainer for the Linux operating system/Unix shell scripting. Get the latest tutorials on SysAdmin, Linux/Unix and open source topics via RSS/XML feed or weekly email newsletter.