Merge pull request #39 from lbonanomi/master

Test if the current user is sudo-su'd into this session

README.md

@@ -1236,6 +1236,12 @@ ___
 who -b
 ```
 
+###### Detect a user sudo-su'd into the current shell
+
+```bash
+[[ $(who -m | awk '{ print $1 }') == $(whoami) ]] || echo "You are su-ed to $(whoami)"
+```
+
 ___
 
 ##### Tool: [screen](https://en.wikipedia.org/wiki/GNU_Screen)