feat: support to suspend

docs/getting-started/external-dns.md

@@ -83,9 +83,3 @@ You should configure dae as follows:
 
 4. If you bind to LAN, make sure your DHCP server will distribute dae as the DNS server (DNS request should be forwarded by dae for domain based traffic split).
 
-## 
-
-
-   ```
-
-   ```

docs/getting-started/reload-and-suspend.md

@@ -0,0 +1,30 @@
+# Reload and Suspend
+
+dae supports configuration reloading and program suspending, which can help you save a lot of time when modifying the configuration or temporarily suspend dae.
+
+**Reload**
+
+Generally, dae won't interrupt connections when reloading configuration. And it is very fast compared to restart.
+
+Usage:
+
+```shell
+dae reload
+```
+
+**Suspend**
+
+It will be useful if you want to suspend dae temporarily and recover it later.
+
+Usage:
+
+```shell
+dae suspend
+```
+
+If you want to recover, use reload:
+
+```shell
+dae reload
+```
+