Adding notes about ssh key generation 1

Reviewed-on: #3

SSH/keygen.md

@@ -0,0 +1,53 @@
+**SSH Key Gen**
+After a fresh install we want to generate an SSH key pair (public and private)
+we can then use this key to ssh onto hosts without having to share passwords.
+
+On the new host
+
+```
+ssh-keygen -t ecdsa
+```
+
+You could add a -C for comment and then add your emaiul address but... meh
+
+
+Example 
+
+```
+~$ ssh-keygen -t ecdsa
+Generating public/private ecdsa key pair.
+Enter file in which to save the key (/home/luddie/.ssh/id_ecdsa):
+Created directory '/home/luddie/.ssh'.
+Enter passphrase for "/home/luddie/.ssh/id_ecdsa" (empty for no passphrase):
+Enter same passphrase again:
+Your identification has been saved in /home/luddie/.ssh/id_ecdsa
+Your public key has been saved in /home/luddie/.ssh/id_ecdsa.pub
+The key fingerprint is:
+SHA256:gA+5oVKPdtlG7JQC5pL3NQ+OokUK7WoosTevWBCd1E0 luddie@debian-base
+The key's randomart image is:
++---[ECDSA 256]---+
+|  +. oE          |
+| B o.+..         |
+|= 1 * X          |
+|.O = / =         |
+|B = B * S        |
+|.X o .           |
+|*.+              |
+|o+ o             |
+|. ...            |
++----[SHA256]-----+
+~$
+
+```
+
+This will generate 2 keys in the .ssh folder
+
+```
+~/.ssh$ ls
+id_ecdsa  id_ecdsa.pub
+~/.ssh$
+```
+
+Use can then cat the .pub file to get the public keyu for that host, which can be added to the authorized_host file of other machines to gain access.
+
+You can also create an authorized_keys on your cost, and add other ssh pub key to allow them to have direct access to this host.