From MEPIS Documentation Wiki
The easiest way to start a bit of software will usually be by just clicking your mouse on the main menu. You open the main menu by clicking on the 'K' or MEPIS icon which is in the bottom left corner of your screen. When the main menu opens it will look something like the one on the right (click on it to enlarge)
Because you are able to change the way that MEPIS looks, and many people do, it is not always easy for someone to explain how to find the right icon on your particular system.
So if you know the name of the bit of software that you wish to start then you can just right-click the desktop, select Run Command..., and enter the name of the application.
Alternatively, you can press the Alt and F2 buttons on your keyboard to open up a Run Command dialog box. Then just type the_name_of_the_software and press the enter key.
One key advantage of launching software from the command line is that you will receive information about the process. This can be useful for troubleshooting or problem solving. To do this just open a terminal and type the_name_of_the_software and press enter
The terms Open/Launch/Start/KMenu are equivalent and interchangeable.
The terms; Piece of software/Program/Application are equivalent and interchangeable.
The terms; Enter/Return are equivalent and interchangeable.
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