Creating Images using GIMP
Once installed, use the following to start GIMP:
Applications → Graphics → GIMP Image Editor

In Fedora, you can find GIMP by searching for the string "gimp" in the Activities area:

After the splash page, three windows should open up:
The Tool Box : this generally displays on the left and contains icons for all the tools that can be used
The GNU Image Manipulation Program window : this is the main area -where the image will be displayed once loaded or created
The Layers, Channel, Path window: this is where the different layers, gradients, etc are accessed

To open a canvas to create a new image on, select the following in the GNU Image Manipulation Program window:
File → New

A dialogue box will display: choose the canvas size you desire (-either by selecting a preset from the "Template" drop-down or by manually typing the desired width and height):

A blank canvas of the correct size will then open up in the main (GIMP) window:

Click on the text tool in Tool Box window:

Click back in the main GIMP window (blank canvas), where you'd like the text to go: a dialogue box will open up asking you for the text. Type in "Linuceum" and check the "Use selected font" before clicking on the "Close" button:

You should see the text added onto the canvas in the font shown in the Tool Box window:

Let's go back to the Tool Box window and change the font to 65 point make it stand out more:

Now, click on the text colour box:

In the dialogue that displays, select a nice blue colour and click "OK":

In the main window, your text should now look something like the following:

Now let's add a grey circle. Click on the "Paintbrush" tool:

Next, click on the foreground swatch:

Pick a grey colour and click "OK":

Set the brush scale to "10.0" (maximum):

In the Layers, Channel, Path window, click on the "Add Layer" icon:

A dialogue box will display - set the name to "circle" and click "OK":

You should now see the new layer in the Layers Palette:

Back in the canvas window, centre the brush over the "i" of "Linuceum", then left-click and release the mouse button. You should see a grey circle added:

Click on the foreground colour swatch again, pick white from the pop up and then change the brush scale from 10.0 to 6.00 :

Back in the canvas window, again centre the brush over the "i" of "Linuceum", then left-click and release the mouse button. You should see a white circle added in the centre of the grey one:

In the Tool Box, click on the "Move" tool:

Back in the canvas window, left click and move the "circle" layer up until the circle is just above the bottom of the "i" of "Linuceum":

Select the "Rectangle Select Tool" tool from the Tool Box:

Select a rectangle around the "i" of "Linuceum":

Hit the "Delete" key on your keyboard to delete the selected section:

Notice the area is only removed from the current ("circle") layer. If you click on the eye icon for the "circle" layer, it will be hidden:

Click the eye icon again to display the layer. Now let's save our image using:
File → Save As
Specify your desired filename and click "OK".