It's easy to add a few lines of text to files on Linux, but there are tools that make it easier to add many lines.

You could even embed an executable file in a script — even another script — and then execute that script which might unpack another script. It boggles the mind.

I often profess that Linux can be used without the command line, but at some point, you might want to learn it anyway. When you do, consider these commands.