Node.js is the server side version of JavaScript. Since it is not limited by the web browser, we can access files on the file system. Here are several code snippets that demonstrate how to read, write, move, delete, change ownership, change permission, check if exists, and get statistics file size, timestamps, and ownership for files.

jQuery provide a convenient way to access elements using CSS selectors. Node.js has a package called Cheerio that allows us to make jQuery style code. The Request module can be used in tandem to provide the ability to perform an HTTP GET to fetch remote HTML documents. That is useful for web scraping.

Perl is commonly used for sysadmin tasks which frequently involves managing files. These examples demonstrate how to read, write, and append files with Perl.

Exif information is a group of meta tags stored on an image. It can contain information about the image, the camera used to take it, software used to manipulate it, latitude and longitude, and even more. This example shows how to use Perl to extract and manipulate image exif data.

Serial communication is still used a bit today. Arduino's are fun programmable microcontrollers and the main method of communication is serial over USB. This example will show you how to communicate using serial in Perl.

Standard in and Standard out (STDIN/STDOUT) are very common methods of interacting with the user. Standard in is typically the keyboard and standard out is the terminal. Haskell makes this very easy to access. The getLine function gets a value from the user and putStrLn and putStr allow you to write to output. The ++ operator is used to concatenate strings.

Haskell is a purely functional programming language create in 1990. This Hello World example will help you get started with Haskell. Install Haskell for your system from the Haskell website. The program installed is called ghc which stands for the Glasgow Haskell Compiler. It can be run interactively or as a compiler.

NASM, or The Netwide Assembler, is an x86 compiler that allows us to turn Assembly code in to machine code object files. Once we have an object file, we can link it and create the final executable. This example is meant for Unix systems or Windows with MinGW toolchain installed. On Debian systems, it can be installed with the nasm package. Put the code below in to hello.asm

Scala provides some of its own libraries for IO, but we can also make use of the Java library. The example of reading a file uses Scala's IO package, but the file writing example uses the Java IO package.