Update cheatsheets

jekyll

@@ -0,0 +1,29 @@
+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# jekyll
+
+> A simple, blog-aware, static site generator.
+> More information: <https://jekyllrb.com/docs/usage/>.
+
+- Generate a development server that will run at http://localhost:4000/:
+
+`jekyll serve`
+
+- Enable incremental regeneration:
+
+`jekyll serve --incremental`
+
+- Enable verbose output:
+
+`jekyll serve --verbose`
+
+- Generate the current directory into `./_site`:
+
+`jekyll build`
+
+- Clean the site (removes site output and `cache` directory) without building:
+
+`jekyll clean`