Update README.md

README.md

@@ -1,6 +1,6 @@
 # Learning Jenkins, 01-05: Install Jenkins on Ubuntu
 
-# Prerequisites
+## Prerequisites
 The target system should be running a recent version of the Ubuntu operating system.
 
 You will need to be able to access the system via CLI, most likely over SSH, and via HTTP on port `8080`.
@@ -8,7 +8,7 @@ You will need to be able to access the system via CLI, most likely over SSH, and
 
 You will need to have `root` permission on the target system, specifically so you can run commands using `sudo`.
 
-# Installation
+## Installation
 In a terminal, run the following commands:
 ```
 wget -q -O - https://pkg.jenkins.io/debian-stable/jenkins.io.key | sudo apt-key add -
@@ -19,7 +19,7 @@ sudo apt-get -y install jenkins
 sudo cat /var/lib/jenkins/secrets/initialAdminPassword
 ```
 
-# Using the Initial Admin Password
+## Using the Initial Admin Password
 Run the following command and copy the output:
 ```
 cat /var/lib/jenkins/secrets/initialAdminPassword