diff --git a/.gitignore b/.gitignore
index 258022a838cd..c3f216e7714d 100644
--- a/.gitignore
+++ b/.gitignore
@@ -162,4 +162,7 @@ cython_debug/
 #  be found at https://github.com/github/gitignore/blob/main/Global/JetBrains.gitignore
 #  and can be added to the global gitignore or merged into this file.  For a more nuclear
 #  option (not recommended) you can uncomment the following to ignore the entire idea folder.
-#.idea/
\ No newline at end of file
+#.idea/
+
+# mailmap can cause privacy issues
+.mailmap
diff --git a/mkdocs/docs/HPC/connecting.md b/mkdocs/docs/HPC/connecting.md
index 7ed4597bf1e8..8a61e9c8650b 100644
--- a/mkdocs/docs/HPC/connecting.md
+++ b/mkdocs/docs/HPC/connecting.md
@@ -360,7 +360,7 @@ Last login: Mon Jan 12 18:52:20 2015 from example.kuleuven.be
 * status messages concerning KU Leuven       *
 * services (incl. HPC):                      *
 *                                            *
-*   https://status.kuleuven.be/              *
+*   https://status.kuleuven.be/               *
 *                                            *
 * For VSC user documentation:                *
 *                                            *
diff --git a/mkdocs/docs/HPC/linux-tutorial/common_pitfalls.md b/mkdocs/docs/HPC/linux-tutorial/common_pitfalls.md
index 40bd1b5c0623..84da2dfcfd9f 100644
--- a/mkdocs/docs/HPC/linux-tutorial/common_pitfalls.md
+++ b/mkdocs/docs/HPC/linux-tutorial/common_pitfalls.md
@@ -137,7 +137,8 @@ smallest of problems!**
 
 # More information
 
-1.  [Unix Power Tools - A **fantastic ** book about most of these tools](https://www.docstore.mik.ua/orelly/unix/upt/index.htm) (see also [The Second Edition](https://www.docstore.mik.ua/orelly/unix2.1/index.htm))
+1.  [Unix Power Tools - A **fantastic ** book about most of these
+    tools](https://web.archive.org/web/20081219192620/http://docstore.mik.ua/orelly/unix/upt/index.htm) 
 
 2.  <https://linuxcommand.org/>: A great place to start with many
     examples. There is an associated book which gets a lot of good
@@ -151,6 +152,6 @@ smallest of problems!**
 5.  [Bash for
     beginners](https://www.tldp.org/LDP/Bash-Beginners-Guide/html/Bash-Beginners-Guide.html)
 
-6.  [MOOC](https://www.edx.org/course/introduction-linux-linuxfoundationx-lfs101x-0)
+6.  [MOOC](https://www.edx.org/learn/linux/the-linux-foundation-introduction-to-linux)
 
 Please don't hesitate to contact in case of questions or problems.
diff --git a/scripts/link_checker/whitelist.txt b/scripts/link_checker/whitelist.txt
index cd763d2c65b9..92a598a86287 100644
--- a/scripts/link_checker/whitelist.txt
+++ b/scripts/link_checker/whitelist.txt
@@ -67,9 +67,6 @@ https://www.tldp.org/LDP/Bash-Beginners-Guide/html/sect_07_01.html
 https://www.tldp.org/LDP/Bash-Beginners-Guide/html/Bash-Beginners-Guide.html
 https://www.tldp.org/guides.html
 
-# 403
-https://www.edx.org/course/introduction-linux-linuxfoundationx-lfs101x-0
-
 # gone?
 https://www.straightrunning.com/XmingNotes/