Guide/SSH: Add a How-To section and more information links (#20598)

* Add a How-To section and more information links

* Change links to markdown style

and make a list of the links
and change youtube link to the full url

guide/english/ssh/index.md

@@ -14,3 +14,14 @@ While SSH has 'Secure' in its name, its prevalence makes it an attractive target
 As with most network services SSH has a standard network port, 22; however, as SSH is an attractive target for those wishing to do harm, it is often moved to an arbitrary port as a very simple security measure.
 
 Finally, it's worth mentioning that SSH is far from tolerant of network instability and there are options out there which can either improve this or replace SSH outright.
+
+### How to Use SSH
+If you're a Mac or Linux user, ssh support is built right into your terminal! Windows added built-in ssh support in the Windows 10 Creators update. If you're a Windows user and you have this update, great! If not, you'll need to install a SSH client like PuTTY. 
+If connecting with a terminal, you can test if your connection is working by typing `ssh username@remote` into your terminal. Remote would be the IP address of the machine that you want to log into and username would be the user you want to login as. You should be prompted for a password. Once you enter the password, you should be logged in remotely!
+
+### More information
+- [Comparison of SSH clients (Wikipedia)](https://en.wikipedia.org/wiki/Comparison_of_SSH_clients)
+- [How SSH Works (YouTube Video)](https://www.youtube.com/watch?v=zlv9dI-9g1U)
+- [SSH (Wikipedia)](https://en.wikipedia.org/wiki/Secure_Shell)
+- [How to Use SSH (Wikihow)](https://www.wikihow.com/Use-SSH)
+- [OverTheWire Bandit Wargame (real-life SSH practice)](http://overthewire.org/wargames/bandit/bandit0.html)