make files deleted properly

backup.py

@@ -20,7 +20,7 @@ def main():
                 print('deleting local files older than {}days in {}'.format(
                     backup_local_age, backup_dir
                 ))
-                cmd = 'find {} -mindepth 1 -mtime +{} -delete'.format(
+                cmd = 'find {} -type f -mtime +{} -delete'.format(
                     backup_dir, backup_local_age
                 )
                 print('({})'.format(cmd))
@@ -30,7 +30,7 @@ def main():
                                               backup_dir)
                 print('({})'.format(cmd))
                 os.system(cmd)
-                cmd = 'ssh {} "find {} -mindepth 1 -mtime +{} -delete"'.format(
+                cmd = 'ssh {} "find {} -type f -mtime +{} -delete"'.format(
                     host, hosts[host][service], backup_server_age)
                 print('({})'.format(cmd))
                 os.system(cmd)