diff --git a/install.sh b/install.sh
index 682a209..3f25f48 100644
--- a/install.sh
+++ b/install.sh
@@ -635,8 +635,11 @@ async def check_port(port):
     if await proxy_running():
         hp = await docker_val("{{range $p,$c := .HostConfig.PortBindings}}{{(index $c 0).HostPort}} {{end}}")
         if str(port) in hp.split(): return None
-    for cmd in ["/usr/sbin/ss", "/sbin/ss", "ss", "netstat"]:
-        code, out, _ = await sh(cmd, "-tlnp", timeout=5)
+    for cmd in ["/usr/bin/ss", "/usr/sbin/ss", "/sbin/ss", "/bin/ss", "ss", "/usr/bin/netstat", "netstat"]:
+        try:
+            code, out, _ = await sh(cmd, "-tlnp", timeout=5)
+        except Exception:
+            continue
         if code == 0 and out:
             for line in out.splitlines():
                 if re.search(rf":{port}\b", line): return line