diff --git a/essential/readme.md b/essential/readme.md
index 530c019..34cb6bd 100644
--- a/essential/readme.md
+++ b/essential/readme.md
@@ -157,16 +157,31 @@ waldek@hellodebian:~$
 
 ![htop](../assets/VirtualBox_debian_18_02_2022_13_18_25.png)
 ![htop](../assets/VirtualBox_debian_18_02_2022_13_18_51.png)
+
+The *menu bar* at the bottom shows you can press **F10** to quit.
+This does not work because of a shortcut of gnome-terminal!
+You can deactivate this shortcut in the preferences though.
+But pressing **q** also exits the program.
+
 ![htop bug with gnome-terminal](../assets/VirtualBox_debian_18_02_2022_13_19_35.png)
 
 ### Adding a secondary desktop environment
 
+During the initial installation we where offered a choice of desktop environments to install.
+This menu was an actual program called `tasksel` we can run again to add different ones!
+As it's a program that can heavily modify the system, we need administrator privileges.
+
+```bash
+waldek@hellodebian:~$ sudo tasksel
+[sudo] password for waldek: 
+```
+
 ![tasksel](../assets/VirtualBox_debian_18_02_2022_13_21_33.png)
 ![tasksel](../assets/VirtualBox_debian_18_02_2022_13_22_33.png)
 ![tasksel](../assets/VirtualBox_debian_18_02_2022_13_22_47.png)
 ![tasksel](../assets/VirtualBox_debian_18_02_2022_13_23_57.png)
 
-### Changing the runlevel
+## Changing the runlevel
 
 The **first** process started by the kernel can be discover by `htop` and is `/usr/sbin/init`.
 This is rather vague but we can find out a *bit* more about this program via `ls` which we'll get into more detail later.
@@ -206,9 +221,17 @@ Created symlink /etc/systemd/system/default.target → /lib/systemd/system/multi
 waldek@hellodebian:~$ sudo reboot now
 ```
 
+After the reboot you'll be confronted with the following screen.
+Don't stress, your machine is not broken!
+It's just running in a more *minimal* mode.
+You can log in just as with the graphical login window but you'll only have a command line to interact with the machine.
+A quick look at `htop` tells us not a lot of stuff is running, just the bare minimum.
+
 ![minimal runlevel](../assets/VirtualBox_debian_18_02_2022_13_40_00.png)
 ![minimal runlevel](../assets/VirtualBox_debian_18_02_2022_13_40_11.png)
 
+To *undo* this change and regain the graphical interface again you can run the following commands.
+
 ```bash
 waldek@hellodebian:~$ sudo systemctl set-default graphical.target
 [sudo] password for waldek: 
@@ -217,4 +240,10 @@ Created symlink /etc/systemd/system/default.target → /lib/systemd/system/graph
 waldek@hellodebian:~$ sudo reboot now
 ```
 
+## Exercise
 
+Please create a second virtual machine and install a **minimal** Debian.
+Minimal means **no graphical environment**.
+I advise you to **not** set a root password.
+Once this machine is up and running, install a few programs.
+The only one we saw up until now is `htop` but maybe try out `bmon`, `elinks` and/or `ranger`.