verify ssh connection

2022/2022-06-07_git-trilogy-part-2/slides/ssh.md

@@ -41,5 +41,20 @@ Now, let's move to GitLab https://gitlab.lcsb.uni.lu/
 - In the **Key** box, paste the copied public key. Make sure it starts with *ssh-ed25519* and finishes with your e-mail.
 - In the **Title** box, type a description, like *Work Laptop*.<br>
 <center>
-<img height="400px" src="slides/img/addSSH.png">
-</center>
\ No newline at end of file
+<img width="60%" src="slides/img/addSSH.png">
+</center>
+
+
+
+# Key-based authentication
+
+Verify that you connect by typing in the Terminal of VS code:
+```bash
+ssh -p 8022 -T git@gitlab.lcsb.uni.lu
+```
+
+The first time, you have to enter `Yes` at the displayed question. Once successful, this should display something like:
+```bash
+$ ssh -p 8022 -T git@gitlab.lcsb.uni.lu
+Welcome to GitLab, @firstname.lastname
+```
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