added images to ssh article

content/fundamentals/ssh.md

@@ -39,6 +39,7 @@ The SSH ecosystem is very well established. It is available on all modern GNU/Li
 distributions, MacOS and Windows. You can use your home server or if you don't have one yet you can use your own personal laptop to experiment (in this case, your laptop will
 play the role of both the server and client as explained later).
 
+
 The commands shown in this guide were run on a [Debian Stretch] distribution
 but the actual tool names should be the same on other distributions.
 
@@ -65,6 +66,8 @@ It is important to understand the client/server architecture of SSH. If you are
 remotely connecting to your home server from your laptop, then your laptop is
 the client and the home server is the server.
 
+![]({attach}images/mserver.svg){: class="img-right"}
+
 There are two packages which contain all the tools that the OpenSSH tool suite
 provides. The [openssh-server] and [openssh-client] packages.
 
@@ -127,11 +130,14 @@ As we have seen so far, connecting to an SSH server using password
 authorisation is relatively simple. However, password authorisation is
 typically recommended against due to [security considerations].
 
+![]({attach}images/tserver.svg){: class="img-left"}
+
 Security is relative and you may not be concerned with defending against a
 [brute-force attack]. However, since other methods of authorisation are so
 commonly used and often the source of of problems when dealing with SSH
 connectivity, we will also cover this topic also.
 
+
 [security considerations]: http://docs.hardentheworld.org/Applications/OpenSSH/#disable-password-authentication
 [brute-force attack]: https://en.wikipedia.org/wiki/Brute-force_attack
 
@@ -172,6 +178,7 @@ These values should match the ones you were first shown. Where the `ECDSA` in
 the first message corresponds to the key file name in `/etc/ssh/`. The SSH
 server will generate key pairs for each algorithm it supports.
 
+
 As you have accepted your server host key fingerprint, the public key of the
 server will be placed in your `$HOME/.ssh/known_hosts` file on your client
 where it will be remembered for future connections.