Merge pull request #21998 from sarahsanders-docker/fix-404s

Fix 404

Author: sarahsanders-docker

content/manuals/engine/install/ubuntu.md

@@ -19,6 +19,7 @@ aliases:
 - /install/linux/docker-ee/ubuntu/
 - /install/linux/ubuntu/
 - /installation/ubuntulinux/
+- /linux/step_one/
 download-url-base: https://download.docker.com/linux/ubuntu
 ---