.... You have mail. .... |What the user types, contrasted with on-screen computer output. a|
.... % date +"The time is %H:%M" The time is 09:18 .... |Manual page references. |Use man:su[1] to change user identity. |User and group names. |Only `root` can do this. |Emphasis. |The user _must_ do this. |Text that the user is expected to replace with the actual text. |To search for a keyword in the manual pages, type `man -k _keyword_` |Environment variables. |`$HOME` is set to the user's home directory.