diff --git a/M3-command-line/L6/index.html b/M3-command-line/L6/index.html
index 3d23d7a..cf3412a 100644
--- a/M3-command-line/L6/index.html
+++ b/M3-command-line/L6/index.html
@@ -21,7 +21,7 @@ <h1>More Resources to Learn about Command Line</h1>
       <li><a href="https://help.ubuntu.com/community/CommandlineHowto" target="_blank">Command Line How-To</a></li>
       <li><a href="https://help.ubuntu.com/community/UsingTheTerminal" target="_blank">Using the Terminal</a></li>
       <li><a href="https://missing.csail.mit.edu/2020/course-shell/" target="_blank">MIT: Your Missing CS Semester: The Shell</a> and <a href="https://missing.csail.mit.edu/2020/shell-tools/" target="_blank">Shell Tools</a></li>
-      <li><a href="https://www.theodinproject.com/courses/foundations/lessons/command-line-basics-web-development-101" target="_blank">The Odin Project: Command Line Basics</a></li>
+      <li><a href="https://www.theodinproject.com/lessons/foundations-command-line-basics" target="_blank">The Odin Project: Command Line Basics </a></li>
       <li><a href="https://agstakingco.gitbook.io/ethereum-2-0-ubuntu-for-beginners/#linux-terminal-basic-commands" target="_blank">Ubuntu for Beginners: Linux Terminal Basic Commands</a> </li>
       <li><a href="https://www.codecademy.com/learn/learn-the-command-line" target="_blank">Code Academy: Learn the Command Line</a></li>
     </ul>
diff --git a/M5-git/L5/index.html b/M5-git/L5/index.html
index 6a90dee..134e9f6 100644
--- a/M5-git/L5/index.html
+++ b/M5-git/L5/index.html
@@ -28,8 +28,8 @@ <h1>Learning More Git</h1>
     <ul>
       <h2>Introductory Content</h2>
         <li><a href="https://guides.github.com/activities/hello-world/" target="_blank">Github Official Hello World Tutorial Series</a></li>
-        <li><a href="https://www.theodinproject.com/courses/foundations/lessons/setting-up-git" target="_blank">The Odin Project: Setting Up Git</a></li>
-        <li><a href="https://www.theodinproject.com/courses/foundations/#git-basics" target="_blank">The Odin Project: Git Basics</a></li>
+        <li><a href="https://www.theodinproject.com/lessons/foundations-setting-up-git" target="_blank">The Odin Project: Setting Up Git</a></li>
+        <li><a href="https://www.theodinproject.com/lessons/foundations-git-basics" target="_blank">The Odin Project: Git Basics</a></li>
         <li><a href="https://missing.csail.mit.edu/2020/version-control/" target="_blank">MIT Missing CS Semester: Version Control (git)</a></li>
         <li><a href="https://learngitbranching.js.org/" target="_blank">Learn Git Branching (interactive tutorial)</a></li>
         <li><a href="https://www.youtube.com/playlist?list=PLRqwX-V7Uu6ZF9C0YMKuns9sLDzK6zoiV" target="_blank">Git and Github for Poets (video)</a></li>
diff --git a/M5-git/L6/index.html b/M5-git/L6/index.html
index b0f9b55..1525e15 100644
--- a/M5-git/L6/index.html
+++ b/M5-git/L6/index.html
@@ -60,7 +60,7 @@ <h2>Contributor Guidelines</h2>
         <ul>
           <li>Join the <a href="http://www.discord.com" target="_blank">Discord</a> or <a href="https://gitter.im/" target="_blank">Gitter</a> for the repository, project or team</li> 
           <li>Ask for guidance to good first issues if they’re not properly marked</li>
-          <li>Read up on community contributor guidelines. For example, here is Go-Ethereum's <a href="https://geth.ethereum.org/docs/developers/devguide" target="_blank">Community Contributor page</a> and their <a href="https://geth.ethereum.org/docs/developers/code-review-guidelines" target="_blank">Code Review Guidelines</a></li> 
+          <li>Read up on community contributor guidelines. For example, here is Go-Ethereum's <a href="https://geth.ethereum.org/docs/developers/geth-developer/contributing" target="_blank">Community Contributor page</a> and their <a href="https://geth.ethereum.org/docs/developers/geth-developer/code-review-guidelines" target="_blank">Code Review Guidelines</a></li> 
           <li>Read through open <i>and</i> closed Pull Requests. In the Pull Request section, you can find all Pull Requests. Click through a few and see if you can  understand how the project processes Pull Requests.</li></ul></p>