How to Install Qt 6 on Ubuntu Linux | Build C++ GUI Apps using QT

To install Qt 6 on Ubuntu 22.04 LTS Linux and start building C++ GUI apps using Qt, follow these steps:

1. Update Package Manager:
Open the terminal and run the following command to update the package manager:
```
sudo apt update
```

2. Install Qt 6 Dependencies:
Install the necessary dependencies for Qt 6 by running the following command:
```
sudo apt install build-essential libgl1-mesa-dev
```

3. Download Qt Installer:
Visit the Qt website (https://www.qt.io/download) and download the Qt Online Installer for Linux.

4. Run the Installer:
Open the terminal, navigate to the directory where you downloaded the Qt installer, and make it executable:
```
chmod +x qt-installer-file.run
```

Run the installer using the following command:
```
./qt-installer-file.run
```

5. Select Installation Components:
In the Qt installer, select the desired components for installation. Make sure to include the Qt version and modules required for C++ GUI development.

6. Choose Installation Directory:
Select the installation directory where Qt 6 will be installed. It is recommended to choose the default directory.

7. Proceed with Installation:
Follow the on-screen instructions to proceed with the installation. Accept the license agreements and wait for the installation to complete.

8. Configure Qt:
After the installation is complete, open a terminal and run the following command to configure Qt:
```
qtchooser -install qt6 /path/to/qt6/Installation/Dir
```

9. Verify Installation:
To verify the installation, open a terminal and run the following command:
```
qmake --version
```

If the installation was successful, it will display the version information for Qt.

Now you have successfully installed Qt 6 on Ubuntu 22.04 LTS Linux. You can start building C++ GUI applications using Qt and unleash the power of Qt's framework and tools.

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