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Command history is a feature in many operating system shells, computer algebra programs, and other software that allows the user to recall, edit and rerun previous commands. Command line history was added to Unix in Bill Joy 's C shell of 1978; Joy took inspiration from an earlier implementation in Interlisp . [ 1 ]
The history command works with the command history list. When the command is issued with no options, it prints the history list. Users can supply options and arguments to the command to manipulate the display of the history list and its entries. The operation of the history command can also be influenced by a shell's environment variables. For ...
(COMMAND.COM uses temporary files, and runs the two sides serially, one after the other.) Multiple commands can be processed in a single command line using the command separator &&. [8] When using this separator in the Windows cmd.exe, each command must complete successfully for the following commands to execute. For example:
A command-line history can be kept, allowing review or repetition of commands. A command-line system may require paper or online manuals for the user's reference, although often a help option provides a concise review of the options of a command. The command-line environment may not provide graphical enhancements such as different fonts or ...
Support for command history means that a user can recall a previous command into the command-line editor and edit it before issuing the potentially modified command. Shells that support completion may also be able to directly complete the command from the command history given a partial/initial part of the previous command.
DOSKEY is a command for DOS, IBM OS/2, [1] Microsoft Windows, [2] and ReactOS [3] that adds command history, macro functionality, and improved editing features to the command-line interpreters COMMAND.COM and cmd.exe.
Keyboard shortcuts make it easier and quicker to perform some simple tasks in your AOL Mail. Access all shortcuts by pressing shift+? on your keyboard. All shortcuts are formatted for Windows computers, but most will work on a Mac by substituting Cmd for Ctrl or Option for Alt. General keyboard shortcuts
Access SysTray ⊞ Win+B: ⇧ Shift+Alt+S: Switch window (next/previous) Alt+Tab ↹ / ⇧ Shift+Alt+Tab ↹. ⌘ Cmd+Tab ↹ / ⌘ Cmd+⇧ Shift+Tab ↹ (While in app switching window, ⌘ Cmd+` can be used to select backward, ⌘ Cmd+1 can be used to view selected app's windows) Alt+Tab ↹ /