what packages are installed by apt

To see what packages are installed by the apt package manager on a Debian-based Linux system, you can use the dpkg command or the apt command. Here's how you can do it:

1. Using dpkg:

   Open a terminal and run the following command:

   dpkg --list

   This will list all installed packages on your system. You can also pipe the output to a pager like less for easier navigation:

   dpkg --list | less

   To search for a specific package, you can use grep. For example, if you want to find packages related to Python:

   dpkg --list | grep python

2. Using apt:

   Another way to list installed packages is to use apt with the list option:

   apt list --installed

   This command will display a list of all installed packages.

Keep in mind that you may need superuser privileges (using sudo) to run these commands, as listing installed packages typically requires administrative access.