You could pipe its output with more $ sudo apt list -installed | moreīefore you start to install new packages you need to update the list of available packages using the apt update $ sudo apt update This command will give you a long list of installed packages. To get a list of installed packages run apt $ sudo apt list -installed Note: You must be logged in as root user and in the sudoers list to be able add, remove or update packages. #deb-src jessie main contrib non-free rpi # Uncomment line below then 'apt-get update' to enable 'apt-get source' The example below shows the sources.list file from Raspbian $ nano /etc/apt/sources.list By default it will have at least one source defined. When installing new packages APT will download the package files from a list of sources that are defined in the file /etc/apt/sources.list. This article explains apt tool however the usage is similar for others also. The three most popular APT tools are apt, apt-get and apt-cache. APT tools are used in Raspberry Pi computers running Raspbian to install new packages, update already installed packages, uninstall/remove packages, browse package details and search for packages.

APT ( Advanced Packaging Tool) is a set of tools that was developed for Debian Linux platform as an easy command line interface for the dpkg utility.

Apt list installed packages