List Installed Packages in Ubuntu 20.04 - How to perform this task ?

This article covers how you can list installed packages on Ubuntu 20.04 LTS system. Also, you can also filter a specific package from the list and count the number of installed packages on your system.

You can list all installed packages with apt command or apt-get command on Ubuntu Linux.

You need to use the apt or apt-get or dpkg command to list all installed packages on an Ubuntu Linux server from the bash shell prompt.

To see what packages are installed on Ubuntu Linux:

1. Open the terminal application or log in to the remote server using ssh (e.g. ssh user@sever-name).

2. Run command apt list --installed to list all installed packages on Ubuntu.

3. To display a list of packages satisfying certain criteria such as show matching apache2 packages, run apt list apache.

To List all installed packages only:

The apt command displays both installed and packages available to install:

$ apt list --installed

To list or find out if a specific package installed or not:

Run package policy as follows:

$ apt list -a pkgNameHere