diff --git a/lib/client.js b/lib/client.js
index 855ecbb..ce2e0f1 100644
--- a/lib/client.js
+++ b/lib/client.js
@@ -3,7 +3,7 @@
 const fs = require('fs');
 const { getNotifySocket } = require('./systemd-env');
 const WebSocket = require('ws');
-const { execFileSync } = require('child_process');
+const { execFileSync, exec } = require('child_process');
 const config    = require('./config');
 const log       = require('./logger');
 const { getBoxId }        = require('./fingerprint');
@@ -101,6 +101,10 @@ class ClawClient {
   async start() {
     log.info('clawd', `启动中... 服务器 = ${this._cfg.server}`);
 
+    if (this._cfg.claw_id) {
+      this._setHostname(this._cfg.claw_id);
+    }
+
     // 启动时关 alarm；若本地已记为已激活，立即亮 pwr（不等首包 connected）
     led.status.off();
     if (this._cfg.activated) {
@@ -416,6 +420,7 @@ class ClawClient {
     this._cfg.claw_id = msg.claw_id;
     this._cfg.token   = msg.token;
     config.save(this._cfg);
+    this._setHostname(msg.claw_id);
 
     if (isNew) {
       log.info('clawd', `注册成功！claw_id = ${msg.claw_id}`);
@@ -469,6 +474,19 @@ class ClawClient {
     }
   }
 
+  // ── Hostname ─────────────────────────────────────────────────────────────────
+
+  _setHostname(clawId) {
+    const hostname = `claw-${clawId}`;
+    exec(`sudo hostname ${hostname}`, (err) => {
+      if (err) {
+        log.warn('clawd', `设置 hostname 失败: ${err.message}`);
+      } else {
+        log.info('clawd', `hostname → ${hostname}`);
+      }
+    });
+  }
+
   // ── OpenClaw 配置 ────────────────────────────────────────────────────────────
 
   _updateOpenClawOrigin(targetId) {