Update cheatsheets

rake

@@ -0,0 +1,30 @@
+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# rake
+
+> A Make-like program for Ruby.
+> Tasks for `rake` are specified in a Rakefile.
+> More information: <https://ruby.github.io/rake>.
+
+- Run the `default` Rakefile task:
+
+`rake`
+
+- Run a specific task:
+
+`rake {{task}}`
+
+- Execute `n` jobs at a time in parallel (number of CPU cores + 4 by default):
+
+`rake --jobs {{n}}`
+
+- Use a specific Rakefile:
+
+`rake --rakefile {{path/to/Rakefile}}`
+
+- Execute `rake` from another directory:
+
+`rake --directory {{path/to/directory}}`