daurnimator@kubuntu:~$ lua
Lua 5.1.1  Copyright (C) 1994-2006 Lua.org, PUC-Rio
> socket = require"socket"
stdin:1: module 'socket' not found:
        no field package.preload['socket']
        no file './socket.lua'
        no file '/usr/local/share/lua/5.1/socket.lua'
        no file '/usr/local/share/lua/5.1/socket/init.lua'
        no file '/usr/local/lib/lua/5.1/socket.lua'
        no file '/usr/local/lib/lua/5.1/socket/init.lua'
        no file '/usr/share/lua/5.1/socket.lua'
        no file '/usr/share/lua/5.1/socket/init.lua'
        no file './socket.so'
        no file '/usr/local/lib/lua/5.1/socket.so'
        no file '/usr/lib/lua/5.1/socket.so'
        no file '/usr/local/lib/lua/5.1/loadall.so'
stack traceback:
        [C]: in function 'require'
        stdin:1: in main chunk
        [C]: ?
>