diff --git a/cmd/docker.md b/cmd/docker.md
index 61e7a49..d46e7c8 100644
--- a/cmd/docker.md
+++ b/cmd/docker.md
@@ -1,6 +1,6 @@
 ### never forget
 * docker inspect [image]
-* docker history --no-truncate [image]
+* docker history --no-trunc [image]
 * docker run -it [image] /bin/sh
 * docker exec -it [image] /bin/sh
 * -p [HOST-port]:[CONTAINER-port]