diff --git a/advanced/learning_bash_scripting.md b/advanced/learning_bash_scripting.md
index 268c7b8..039bba2 100644
--- a/advanced/learning_bash_scripting.md
+++ b/advanced/learning_bash_scripting.md
@@ -1116,12 +1116,36 @@ TODO
 # Coding challenge - pipe or argument plus action!
 
 Can you expand the previous coding challenge, where you perform a conditional logic on the input of the script and actually *use* the incoming data?
+For example, print a shopping list or make a sum of all items you need to purchase.
 
 # Coding challenge - Rename files
 
 Rename all files from [this](../assets/simple_sort_01.tar.gz) file with an prefix or postfix.
 Can you give the files that start with an **uppercase** letter a different pre or postfix?
 Can you move the files with lowercase into a different folder?
+If you did it with a prefix, now try with a postfix.
+
+# Coding challenge - Rename jpeg files
+
+Download [these](../assets/) files, which are all `jpeg` files.
+The extensions however are not really uniform.
+Find the most common extension type and rename all files with that extension.
+
+# Coding challenge - Remove duplicate files
+
+Find all duplicate files and move them to a different directory.
+How certain are you that they are duplicates?
+
+TODO - shasum exercise
+
+# Coding challenge - File tree
+
+Download [this](../assets/) file and use the content of the directory to write me a program that prints the content as a tree structure.
+You can be *creative* but it's interesting to learn how to perform these action by hand.
+As an extra challenge I would like you to add different behaviour to the script, depending on the input.
+For example, if the input file is a `tar.gz` file, the program will automatically uncompress and then show the tree.
+
+[hint](https://www.shellscript.sh/eg/directories/)
 
 # Coding challenge - Guess the number
 
@@ -1173,6 +1197,8 @@ done
 
 ## defining a function
 
+## function arguments
+
 ## global vs local variable
 
 ## return values
@@ -1181,6 +1207,15 @@ done
 
 [Ryan's tutorials](https://ryanstutorials.net/bash-scripting-tutorial/bash-functions.php)
 
+# Coding challenge - Student reports
+
+With the [following](../assets/scores.csv) file write me a program that prints:
+
+* the total average score for each student
+* individual scores for each student
+* list of passed student or list of failed students
+
+
 # User Interface - Make your scripts user friendly.
 
 * `case` for command line arguments
@@ -1189,6 +1224,15 @@ done
 * [better dialog tutorial](https://linuxcommand.org/lc3_adv_dialog.php)
 * [Ryan's tutorials](https://ryanstutorials.net/bash-scripting-tutorial/bash-user-interfaces.php)
 
+# Coding challenge - Address book
+
+* one file db or folder db
+* case insensitive search
+* edit record when found
+* format cell phone number to standard representation
+
+TODO
+
 # Arrays in `bash`
 
 TODO
diff --git a/links.md b/links.md
index 7ad4223..b963a67 100644
--- a/links.md
+++ b/links.md
@@ -9,12 +9,19 @@
 	* [debian](https://wiki.debian.org/nspawn)
 	* [arch](https://wiki.archlinux.org/title/systemd-nspawn#Use_a_%22macvlan%22_or_%22ipvlan%22_interface)
 	* [systemd-sysext](https://0pointer.net/blog/testing-my-system-code-in-usr-without-modifying-usr.html)
+* show usage of `systemd-run`
+* exercise on minimal wayland configuration
 * [history of command line arguments](https://blog.liw.fi/posts/2022/05/07/unix-cli/)
 * class on dpkg, apt, and .deb introspection
 * class on compiling a simple program, maybe recompiling a kernel
 * exercise on how to take a physical system and convert it to a VM
 * munin plugin design exercise
 * advanced [bash](https://tldp.org/LDP/abs/html/index.html) scripting
+* make a minimal sway installation usable (wayland focused)
+	* maybe same but with i3
+* journald-remote exercise with https!
+* setup automated install of debian
+* gpg/pass/paper-key tutorial
 
 ## started