Update README.md

README.md

@@ -39,17 +39,25 @@ For a list of supported keystrokes and their names, check the output of
 
 ## Installation
 
-##### Ubuntu/Debian
+After your installation, independent of the method, you should add yourself
+to the `input` and `plugdev` groups so that you can read keycodes from them.
+You have to start the application via sudo otherwise.
 
 ```bash
-wget "https://github.com/sezanzeb/key-mapper/releases/download/0.1.0/python3-key-mapper_0.1.0-1_all.deb"
-sudo dpkg -i python3-key-mapper_0.1.0-1_all.deb
 sudo usermod -a -G plugdev,input $USER
 # log out and back in or restart,
 # the two groups should be visible with:
 groups
 ```
 
+##### Ubuntu/Debian
+
+```bash
+wget "https://github.com/sezanzeb/key-mapper/releases/download/0.1.0/python3-key-mapper_0.1.0-1_all.deb"
+sudo dpkg -i python3-key-mapper_0.1.0-1_all.deb
+sudo usermod -a -G plugdev,input $USER
+```
+
 ##### Manjaro/Arch
 
 ```bash
@@ -62,9 +70,6 @@ pacaur -S key-mapper-git
 git clone https://github.com/sezanzeb/key-mapper.git
 sudo pip install key-mapper
 sudo usermod -a -G plugdev,input $USER
-# log out and back in or restart,
-# the two groups should be visible with:
-groups
 ```
 
 ## Roadmap