Installing Lua

Before writing any Lua code, you need a working Lua interpreter on your machine. The official distribution, available from lua.org, ships as source code that you compile yourself, since the Lua team does not publish official binaries for every platform. In practice, most developers install Lua through their operating system's package manager, a tool like Homebrew or apt, or a bundled distribution such as LuaJIT, which offers a compatible interpreter with a just-in-time compiler for faster execution.

On Debian- or Ubuntu-based Linux distributions, sudo apt install lua5.4 pulls a ready-to-use interpreter directly from the system repositories. On macOS, Homebrew makes this a one-line install with brew install lua, which also sets up LuaRocks-compatible paths. Windows users typically install Lua through a distribution like LuaBinaries, via the Chocolatey package manager with choco install lua, or by using Windows Subsystem for Linux (WSL) to get the same apt-based workflow as native Linux. Each of these routes produces a lua executable on your PATH, so the day-to-day experience of running scripts is identical regardless of which platform you installed on.

Once installed, confirm everything worked by running lua -v in a terminal, which prints the interpreter's version string, such as Lua 5.4.6. Running lua with no arguments drops you into the interactive REPL (read-eval-print loop), where you can type expressions like print(2 + 2) and see results immediately without saving a file. This is the fastest way to sanity-check syntax, inspect the behavior of a standard library function, or experiment with a table before committing it to a script. Exit the REPL with os.exit(), Ctrl-D on Unix-like systems, or Ctrl-Z followed by Enter on Windows.

LuaRocks is the de facto package manager for Lua, letting you install reusable libraries — called 'rocks' — the way npm does for Node.js or pip does for Python. After installing Lua itself, install LuaRocks via your OS package manager (brew install luarocks, sudo apt install luarocks) or by building it from source, then use commands like luarocks install luasocket to pull networking libraries or luarocks install busted for a testing framework. LuaRocks respects Lua's version-specific module paths, so it's worth confirming with lua -v which Lua version you're targeting before installing rocks, since a rock built against Lua 5.1 won't necessarily load cleanly under Lua 5.4.