Added lighttpd and renamed uname to linux for getting their versions.

linux/linux.lua

@@ -0,0 +1,27 @@
+---
+permalink: /cgi/linux/index.lua
+---
+
+-- Function to execute shell commands
+local function shell_exec(command)
+    local handle = io.popen(command)
+    local result = handle:read("*a")
+    handle:close()
+    return result
+end
+
+-- Execute shell command
+local uname = shell_exec('uname -mrs')
+
+-- Find position of the first occurrence of a substring in a string
+local pos = string.find(uname, '-', 1, true)
+
+-- Extract substring
+local res = string.sub(uname, 1, pos - 1)
+
+-- Output the HTTP header
+io.write("Content-Type: text/plain; charset=utf-8\r\n\r\n")
+
+-- Output the result
+io.write(res:sub(7, 12))
+