aws - prere

Signed-off-by: Quan Zhou <quan@bitergia.com>

Author: zhquan

docs/prerequisites.md

@@ -324,6 +324,9 @@ After the instance is created, you can connect to it:
    chmod 400 bap-ssh.pem
    ssh -i bap-ssh.pem admin@<control-node-public-ip>
    ```
+   If you want to know the exact command to connect to the control node, you
+   can find it in the AWS UI:
+   - EC2 -> Instances -> `control-node` -> Connect button -> SSH client.
 
 1. Copy the SSH key to the control node:
    ```terminal