How To Install qt4-demos on Ubuntu 18.04
Introduction
In this tutorial we learn how to install qt4-demos on Ubuntu 18.04.
What is qt4-demos
qt4-demos is:
Qt is a cross-platform C++ application framework. Qt’s primary feature is its rich set of widgets that provide standard GUI functionality.
This package contains Qt 4 examples and demos.
There are three methods to install qt4-demos on Ubuntu 18.04. We can use apt-get, apt and aptitude. In the following sections we will describe each method. You can choose one of them.
Install qt4-demos Using apt-get
Update apt database with apt-get using the following command.
sudo apt-get update
After updating apt database, We can install qt4-demos using apt-get by running the following command:
sudo apt-get -y install qt4-demos
Install qt4-demos Using apt
Update apt database with apt using the following command.
sudo apt update
After updating apt database, We can install qt4-demos using apt by running the following command:
sudo apt -y install qt4-demos
Install qt4-demos Using aptitude
If you want to follow this method, you might need to install aptitude first since aptitude is usually not installed by default on Ubuntu. Update apt database with aptitude using the following command.
sudo aptitude update
After updating apt database, We can install qt4-demos using aptitude by running the following command:
sudo aptitude -y install qt4-demos
How To Uninstall qt4-demos on Ubuntu 18.04
To uninstall only the qt4-demos package we can use the following command:
sudo apt-get remove qt4-demos
Uninstall qt4-demos And Its Dependencies
To uninstall qt4-demos and its dependencies that are no longer needed by Ubuntu 18.04, we can use the command below:
sudo apt-get -y autoremove qt4-demos
Remove qt4-demos Configurations and Data
To remove qt4-demos configuration and data from Ubuntu 18.04 we can use the following command:
sudo apt-get -y purge qt4-demos
Remove qt4-demos configuration, data, and all of its dependencies
We can use the following command to remove qt4-demos configurations, data and all of its dependencies, we can use the following command:
sudo apt-get -y autoremove --purge qt4-demos
References
Summary
In this tutorial we learn how to install qt4-demos package on Ubuntu 18.04 using different package management tools: apt, apt-get and aptitude.
