UNIX® Shells by Example, Third Edition

13.3. Command Line Shortcuts

13.3.1. History

The history mechanism is built into the TC shell. It keeps in memory a sequentially numbered list of the commands, called events, that you have typed at the command line. In addition to the number of the history event, it also keeps track of the time the event was entered at the terminal. When the shell reads a command from the terminal, it breaks the command line into words (using whitespace to designate a word break), saves the line to the history list, parses it, and then executes it. The previous command typed is always saved. You can recall a command at any time from the history list and reexecute it without retyping the command. During a login session, the commands you type are appended to the ...