diff --git a/content/roadmaps/102-devops/content/102-managing-servers/100-operating-system/102-ubuntu.md b/content/roadmaps/102-devops/content/102-managing-servers/100-operating-system/102-ubuntu.md
index a61c21c0f..2578d323e 100644
--- a/content/roadmaps/102-devops/content/102-managing-servers/100-operating-system/102-ubuntu.md
+++ b/content/roadmaps/102-devops/content/102-managing-servers/100-operating-system/102-ubuntu.md
@@ -11,3 +11,4 @@ Ubuntu is a free and open-source Linux distribution based on Debian. Ubuntu is a
Ubuntu Documentation
Install Ubuntu Desktop Documentation
Getting Started with Ubuntu Tutorials
+The Linux Command Line by William Shotts