Move pages under tldr, lint run.sh, update docs

tldr/linux/mdbook

@@ -0,0 +1,29 @@
+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# mdbook
+
+> Create online books by writing Markdown files.
+> More information: <https://rust-lang.github.io/mdBook/>.
+
+- Create an mdbook project in the current directory:
+
+`mdbook init`
+
+- Create an mdbook project in a specific directory:
+
+`mdbook init {{path/to/directory}}`
+
+- Clean the directory with the generated book:
+
+`mdbook clean`
+
+- Serve a book at <http://localhost:3000>, auto build when file changes:
+
+`mdbook serve`
+
+- Watch a set of Markdown files and automatically build when a file is changed:
+
+`mdbook watch`