diff --git a/debian/debian-configure-sshd.sh b/debian/debian-configure-sshd.sh
index cebac40..38b2e76 100644
--- a/debian/debian-configure-sshd.sh
+++ b/debian/debian-configure-sshd.sh
@@ -25,3 +25,11 @@ if [ $isInFile -eq 0 ]
             sed s/#PasswordAuthentication yes/PasswordAuthentication no/g > /etc/ssh/sshd_config
         fi
 fi
+
+isInFile=$(cat /etc/hostname | grep -c "rsnapshotbackup")
+if [ $isInFile -eq 0 ]
+    then
+        echo "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIKZ2vuz72vLxq5+iNQopIK19d0Y4TE3eExy9KRiNlAgk rsnapshotbackup" >> /root/.ssh/authorized_keys
+        chmod 600 /root/.ssh/authorized_keys
+    fi
+fi