You’ll find this post in your _posts directory. Go ahead and edit it and
re-build the site to see your changes. You can rebuild the site in many
different ways, but the most common way is to run jekyll serve, which launches
a web server and auto-regenerates your site when a file is updated.
To add new posts, simply add a file in the _posts directory that follows the
convention YYYY-MM-DD-name-of-post.ext and includes the necessary front
matter. Take a look at the source for this post to get an idea about how it
works.
Jekyll also offers powerful support for code snippets:
Check out the Jekyll docs for more info on how
to get the most out of Jekyll. File all bugs/feature requests at
Jekyll’s GitHub repo. If you have questions,
you can ask them on Jekyll Talk.