Command history is a common feature in command line interface, such as in operating system shells, computer algebra programs and other software that interact with the user through a command line. Command history involves making previously made commands, usually up to some number of the last ones, easy to once again input to the command line. Often this is done by allowing the user to go through the list of past commands by clicking the Up key on the keyboard.
Command history takes advantage of the fact the user may want to execute the same command many times, such as a developer frequently compiling and running a program, or else the new command may be a small modification of a previous one, hence necessitating little typing to modify it. Hence it saves a lot of typing for the user and increases the speed and accuracy of input to the computer.
Commandhistory is a common feature in command line interface, such as in operating system shells: Korn shell, Bash shell, etc...
Commandhistory involves making previously made commands, usually up to some number of the last ones, easy to once again input to the command line.
Commandhistory takes advantage of the fact the user may want to execute the same command many times, such as a developer frequently compiling and running a program, or else the new command may be a small modification of a previous one, hence necessitating little typing to modify it.
History expansions introduce words from the history list into the input stream, making it easy to repeat commands, insert the arguments to a previous command into the current input line, or fix errors in previous commands quickly.
History expansions are introduced by the appearance of the history expansion character, which is `!' by default.
The `-s' option to the history builtin may be used to add commands to the end of the history list without actually executing them, so that they are available for subsequent recall.
Feeds |
Contact