How to run multiple commands in Linux? Make a programm?
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First of all, I would like to let you know that I am new to Linux. I did my search, but I don't really know what is it that I am looking for.

What I need is to make a simple program, that executes different commands one after another in terminal, because I don't want to run them by hand every time I need it. How do I make it? And how do I run it, because I suppose I can't just double click, or can I?    

Thanks for help!