diff --git a/config/index.js b/config/index.js
index dda6e21..a97996a 100644
--- a/config/index.js
+++ b/config/index.js
@@ -1,4 +1,6 @@
 module.exports = {
     port: 9900,
-    command: 'ip -6 addr show enp3s0'
+    command: (interface) => {
+        return `ip -6 addr show ${interface}`
+    }
 }
\ No newline at end of file
diff --git a/index.js b/index.js
index 0740e20..6f0151b 100644
--- a/index.js
+++ b/index.js
@@ -14,9 +14,14 @@ app.use((req, res, next) => {
    next();
 });
 
-// 提供接口，查询ubuntu server上的ipv6地址，处理字符串后，序列化为json返回.
+/**
+ * 提供接口，查询ubuntu server上的ipv6地址，处理字符串后，序列化为json返回.
+ * 案例: https://ip.bmycode.help/ip?interface=enp3s0
+ * 参数: interface 网卡名称
+ */
 app.get('/ip', async (req, res) => {
-   let output = execSync(command, { encoding: "utf8" });
+   let interface = req.query.interface || "enp3s0"
+   let output = execSync(command(interface), { encoding: "utf8" });
    res.json(await ip.parseNetworkInfo(output))
 })