Use excerpt blocks for all posts

source/_posts/2012-02-01-authorized-keys-passwordless-ssh.md

@@ -6,8 +6,11 @@ tags:
   - ssh
 use: [posts]
 ---
+{% block excerpt %}
 If you're accessing Linux servers or automating tasks between servers, rather than having to enter your user password every time, you can also use SSH public key authentication. This is a simple process that involves creating a local key and storing it within the *authorized_keys* file on the remote server.
+{% endblock %}
 
+{% block content %}
 1. Check if you already have a SSH key.
    `$ ssh-add -L` 
 2. If you don't have one, create one.
@@ -26,3 +29,4 @@ If successful, you should now see a message like:
 > to make sure we haven't added extra keys that you weren't expecting.
 
 Now the next time that you SSH onto the server, it should log you in without prompting you for your password.
+{% endblock %}