Finding installed packages in GUI mode is easy. All we have to do is to Just open the Menu or Dash, and enter the package name in search box. If the package is installed, you will see the menu entry. It is simple as that. But, it is difficult to find it in a system where it doesn’t has GUI mode. So, knowing how to find out a package is installed or not in CLI mode is equally important as we do in GUI mode. Now, let us find out how can we find if a package is installed or not, shall we?
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