diff --git a/bash.md b/bash.md
index b46d570..55d3107 100644
--- a/bash.md
+++ b/bash.md
@@ -66,3 +66,7 @@ add client
 * host setup //etc/ssh/sshd_config to allow passwords and restart
 * client uses `ssh-copy-id host_address -p port_num` to move the key to the host
 * client uses `ssh` to login
+
+rename files in the current director
+------------------------------------------------------------
+rename 's/find_this_in_the_file_name/replace_with_this/g' *