lua rewrite

modules/age.lua

@@ -0,0 +1,10 @@
+local util = require("modules/util")
+
+local function get_system_age()
+    local install_time = 1793894400 -- Choose your own install time (unix timestamp)
+    local now = tonumber(util.process_get_one_line("date +%s"))
+
+    return util.format_time(now - install_time)
+end
+
+return { name = "age", cmd = get_system_age }