We recently covered 12 keyboard shortcuts to help navigate around and manipulate text in Mac OS X, and now we’ll show you a handful of similar tricks for use at the command line. These shortcuts can be used just about anywhere in the Terminal, including the bash prompt.

Have you ever noticed that Mail app registers a message as “read” after it has been clicked? The automatic “mark as read” feature makes it easy to quickly skim through a bunch of emails, but Mail doesn’t offer much control over the the delay for when messages are marked read.