luasocket安装

执行如下代码
local socket = require('socket')
local MyHostName = socket.dns.gethostname()    --本机名
local MyIP = socket.dns.toip(MyHostName)   --本机IP
print("==========",MyHostName,MyIP)

报错：

E:\Program Files (x86)\Lua\5.1\lua.exe: ./src/demo/getip.lua:7: module 'socket' not found:
no field package.preload['socket']
no file 'E:\Program Files (x86)\Lua\5.1'
no file '.\socket.dll'
no file 'E:\Program Files (x86)\Lua\5.1\socket.dll'
no file 'E:\Program Files (x86)\Lua\5.1\loadall.dll'
no file 'E:\Program Files (x86)\Lua\5.1\clibs\socket.dll'
no file 'E:\Program Files (x86)\Lua\5.1\clibs\loadall.dll'
no file '.\socket51.dll'
no file 'E:\Program Files (x86)\Lua\5.1\socket51.dll'
no file 'E:\Program Files (x86)\Lua\5.1\clibs\socket51.dll'
stack traceback:
[C]: in function 'require'
./src/demo/getip.lua:7: in main chunk
[C]: ?

由于缺少socket包。

进行安装：

> sudo apt-get install luarocks

>sudo luarocks install luasocket

> lua getip.lua
========== pz 10.0.2.15

执行成功！