diff --git a/app/ceph.py b/app/ceph.py
index f982802..ac57f08 100644
--- a/app/ceph.py
+++ b/app/ceph.py
@@ -17,7 +17,6 @@ def setup(ceph_url, ssh_username):
         subprocess.check_output(command.split())
     except Exception:
         p = subprocess.check_output(f"ssh-keyscan {ceph_url}".split())
-        keys = p.decode("utf-8").split("\n")
+        keys = p.decode("utf-8").strip().split("\n")
         with open(os.path.expanduser("~/.ssh/known_hosts"), "a") as known_hosts:
-            for key in keys:
-                known_hosts.write(key)
\ No newline at end of file
+                known_hosts.writelines(keys)
\ No newline at end of file