Analysis of information sources in references of the Wikipedia article "Kabuk programlama" in Turkish language version.
The shell is actually a programming language: it has variables, loops, decision-making, and so on.
Rather than using a file extension for shell scripts, it's preferred to keep a filename without extension and let an interpreter identify the type by looking into shebang(#!).
Shell scripts don't need a special file extension, so leave the extension blank (or you can add the extension .sh if you prefer, but this isn't required.)
