Node runs on POSIX-like operating systems, the various UNIX derivatives (Solaris, and so on), or workalikes (Linux, Mac OS X, and so on), as well as on Microsoft Windows, thanks to the extensive assistance from Microsoft. Indeed, many of the Node built-in functions are direct corollaries to POSIX system calls. It can run on machines both large and small, including the tiny ARM devices such as the Raspberry Pi microscale embeddable computer for DIY software/hardware projects.

Node is now available via package management systems, limiting the need to compile and install from source.

Installing from source requires having a C compiler (such as GCC), and Python 2.7 (or later). If you plan to use encryption in your networking code you will also need the OpenSSL cryptographic library. The modern UNIX derivatives almost certainly come with these, and Node's configure script (see later when we download and configure the source) will detect their presence. If you should have to...