Blah blah blah from Alpha

how to test the pages on localhost

Run jekyll serve¹

And it will auto regenerate the pages if you have modify any of the posts.

how to put the github pages under url <username>.github.io rather than <username>.github.io/<project-name>

Create a repository name as <username>.github.io (replace <username> with yours). And push the changes to main branch rather than gh-pages branch.

Enable footnotes under jekyll

in _config.jml, set markdown as markdown: kramdown.

Reference:

• http://www.ruanyifeng.com/blog/2012/08/blogging_with_jekyll.html (in Chinese)
• http://jekyllrb.com/docs/github-pages/

P.S.: