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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 ]
less is a terminal pager program on Unix, Windows, and Unix-like systems used to view (but not change) the contents of a text file one screen at a time. It is similar to more, but has the extended capability of allowing both forward and backward navigation through the file.
Bash, short for Bourne-Again SHell, is a shell program and command language supported by the Free Software Foundation [2] and first developed for the GNU Project [3] by Brian Fox. [4]
GNU Readline is a software library that provides in-line editing and history capabilities for interactive programs with a command-line interface, such as Bash.It is currently maintained by Chet Ramey as part of the GNU Project.
The history command has the following syntax in tcsh: history [-hTr] [n] history -S|-L|-M [filename] (+) history -c (+) The first form prints the history event list. If n is given only the n most recent events are printed or saved. With -h, the history list is printed without leading numbers.
Note: Clearing your search history only stops your search history from being used for product features like predicting what you're searching for. It does not stop your search information from being used to personalize the ads and content you see.
[2] less is a more advanced pager that allows movement forward and backward, and contains extra functions such as search. [3] Some programs incorporate their own paging function, for example bash's tab completion function. [4]
fc is a builtin command in the Bash and Zsh shells and is an initialism for "fix command". It is particularly helpful for editing complex, multi-line commands. The editor can be specified by setting the EDITOR (changes the default editor) or the FCEDIT environment variable.