Add ssh keys in remote handouts.

remotes/remotes_handouts.tex

@@ -15,10 +15,30 @@ Please take the following into account with respect to our GitLab server:
   \item If you don't have an LUMC account, ask us to create a GitLab account
     for you and select {\em Standard} instead of {\em LDAP} on the login
     page.
-  \item Our GitLab server is very similar (in fact, it is a clone) to the
-    popular online GitHub (\url{https://github.com}) and Bitbucket
-    (\url{https://bitbucket.org}) services.
 \end{itemize}
+
+It is convenient to set up an ssh key on GitLab. Make one as follows (you can leave all fields blank):
+\begin{lstlisting}
+  $ ssh-keygen
+  Enter file in which to save the key (/home/<username>/.ssh/id_rsa):
+  Enter passphrase (empty for no passphrase):
+  Enter same passphrase again:
+\end{lstlisting}
+\medskip
+
+Open \url{https://git.lumc.nl} in your browser and log in.
+\medskip
+
+Click on your avatar (top-right corner), choose ``Settings'', and then go the ``SSH Keys'' page.
+\medskip
+
+Copy your ssh key, retrieved with the following \lstinline{cat} command, and paste it in the ``Key'' field:
+\begin{lstlisting}
+  $ cat ~/.ssh/id_rsa.pub
+\end{lstlisting}
+\medskip
+
+Give your key a title (e.g., ``Course machine'') and press the ``Add key'' button.
 \bigskip
 
 \subsubsection*{Add your repository to GitLab}