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.

The Linux command line interface provides a wealth of tools for text processing, and one of the most powerful among them is the sed command. Sed, an abbreviation for Stream EDitor, is a versatile tool ...