How to find the installed packages in your Ubuntu machine?
Before moving further, go through Understanding the state of a package. If the state of a package is “ii“, the package is installed. With this logic, we can find the installed packages in the system
$ dpkg --list| grep "^ii" ii acpi-support 0.136 scripts for handling many ACPI events ii acpid 1.0.10-5ubuntu2 Advanced Configuration and Power Interface e ii adduser 3.112ubuntu1 add and remove users and groups ii adium-theme-ubuntu 0.1-0ubuntu1 Adium message style for Ubuntu ii aisleriot 1:2.30.0-0ubuntu6 Solitaire card games ii akonadi-server 1.3.1-0ubuntu3 Akonadi PIM storage service ii akregator 4:4.4.2-0ubuntu5 RSS feed aggregator for KDE
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