A step by step guide to install Ubuntu Linux on any computer.
We will see the steps to download and install Ubuntu on a machine.

1. Through ISO
2. Through another machine having Ubuntu Linux.

• It will need sudo permission at times so grant that.

• You will need to add the following to the g++ command when compiling the OpenCV code.

    `pkg-config --libs --cflags opencv`
  

• Then use CFLAGS for making .o and LDFLAGS for making final executable.

    CFLAGS = `pkg-config --cflags opencv`
    LDFLAGS = `pkg-config --libs opencv`
  

• You firstly need to download the RUN file of the installer from the website of Qt.

• Then you have to give permissions to it with chmod command so you can execute it.

• And then go with the following commands.

    sudo apt update
    sudo apt-get install build-essential libgl1-mesa-dev mesa-common-dev
  

• Here, we downloading some essential libraries so we can run Qt.

• And that's it.

• You can now use the QtCreator.

• Now, you have add the following to the configuration file(.pro file) for the project.

unix {
	LIBS += `pkg-config --libs opencv`  
	INCLUDEPATH += `pkg-config --cflags opencv`
	DEPENDPATH += `pkg-config --libs opencv`
}

• NOTE: Makefiles are whitespace sensitive so do not leave white spaces.