How to completely uninstall applications by command line in Ubuntu

Uninstalling the software from the command line via Terminal is one of the most important tasks while dealing with troubleshooting a remotely connected Ubuntu PC. In today’s Terminal Tuts session, let’s take a deep dive into it.

Uninstalling Software from Terminal in Ubuntu

The following guide is tested on Ubuntu 17.10 but should work on older Ubuntu versions as well as Linux Mint, and elementary OS.

Step 1) To uninstall a software package, you need to know the exact name of it. We shall use the tdpkg list command for it. Launch ‘Terminal’ and enter the following command:

dpkg --list

You should see a long list of applications. Note down the name of the program which you want to uninstall. For example, I want to remove VLC Media Player, which is listed as just ‘vlc’.

dpkg --list command listing all apps in Ubuntu 17.10 Terminal
dpkg –list command listing all apps in Ubuntu 17.10 Terminal

Step 2) To uninstall a program, we shall use remove command along with apt-get, which is typically used to install applications. Of course, sudo command to carry out superuser tasks. There are two important things to consider on what’s your uninstallation plan.

Keep Personalized Settings:

If you are removing a program only to reinstall later, then you may want to keep the configuration files, which will remember your settings applied in that app. In such a case, use the remove command as follows:

General format:

sudo apt-get remove package_name

In my case, to remove vlc:

sudo apt-get remove vlc

Complete Uninstallation:

On the other hand, use –purge command to completely uninstall the app if you plan not to reinstall the app.

sudo apt-get --purge remove package_name
sudo apt-get --purge remove vlc

Some Housekeeping

Now that you have uninstalled the software, you may want to do some extra cleanup to remove the dependencies of the software you uninstalled now or may be in the past. Dependencies are the apps and libraries that are used by the software you no longer have in your PC. Note that it is entirely safe to do so because no application is using them.

sudo apt-get autoremove

As you see autoremove command is generic cleaning command for any obsolete packages that are left over in your PC.

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