diff --git a/README.md b/README.md
index 01e2273..72da97e 100644
--- a/README.md
+++ b/README.md
@@ -21,17 +21,20 @@ We can now start the container in detached mode:
 docker run -td escomp/cesm-2.2:latest
 ```
 ![alt text](img/Docker_run.png "Docker run")
+Take note of the UUID long identifier which starts with *192df0aa73*: this string has been randomly generated by 
+the Docker daemon.
 
-To start an interactive processe like a bash shell we use *docker exec ... bash*
-(Notice that *-t* is to allocate a pseudo-tty and *-i* to keep STDIN open even if not attached) 
+
+To start an interactive processe like a bash shell we use *docker exec ... bash* with the first letters of the UUID
+(here *-t* is to allocate a pseudo-tty and *-i* to keep STDIN open even if not attached):
 ```
 docker exec -it 192 bash
 ```
 ![alt text](img/Docker_exec.png "Docker exec")
 The promp has now changed to **[user@cesm2.2 ~]$** to confirm that we are in the container.
 
-We can now, for example, check the version of the operating system inside the container (Centos-8 in this case, 
-whereas the shell was originally Debian):
+We can now, for example, check the version of the operating system inside the container (it is Centos-8 in this case, 
+whereas that was originally Debian in the Google Cloud Shell):
 ```
 cat /etc/os-release
 ```