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End-users can often modify prompts.
From the storm chasing unit game 1960s onwards, user interaction with computers was primarily by means of command-line interfaces, initially on machines like the Teletype Model 33 ASR, but then on early CRT -based computer terminals such as the VT52.Unix command names, arguments and options are case-sensitive (except in a few examples, mainly where popular commands from other operating systems have been ported to Unix).Built-in usage help edit See also: help (command) One of the criticisms of a CLI is the lack of cues to the user as to the available actions.A very small number, mainly ports from Unix-like systems, are programmed to accept "-" even if the switch character is not set to it (for example netstat and ping, supplied with Windows, will accept the /?A CLI can generally be considered as consisting of syntax and semantics.
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Command-line interfaces to computer operating systems are less widely used by casual computer users, who favor graphical user interfaces or menu-driven interaction.
Under DR-DOS, if the setting has been changed from the first directory separator in the display of the prompt parameter G will change to a forward slash / (which is also a valid directory separator in DOS, FlexOS, 4680 OS, 4690 OS, OS/2 and Windows).
This requires the user to know the names of the commands and their parameters, and the syntax of the language that is interpreted.
So instead of a human communicating with another human over a teleprinter, a human communicated with a computer.Worth (regional airport) DG - Data General Corporate name DG - Dei Gratia (by the grace of God) DG - Directional Gyro DG - Director General DGA - Direct Graphics Access DGP - Dissimilar Gateway Protocol dgsc - Defense General Supply Center dhhs - Department.A web browser's URL input field can be used as a command line.Citation needed However, entering a program name without parameters in the hope that it will display usage help can be hazardous, as some programs and scripts execute without further notice.For example, in Unix and Unix-like environments, an example of a command-line argument is: rm file.Brian Kernighan Rob Pike 13 The terms command-line interpreter, command line shell, command language interpreter, or identical abbreviation CLI, are applied to computer programs designed to interpret a sequence of lines of text which may be entered by a user, read from a file.Epri - Electric Power Research Institute eprom - Erasable Programmable Read-Only Memory EPS - Encapsulated PostScript epscs - Enhanced Private Switched Communication Service epsf - Encapsulated PostScript File epsf - Encapsulated PostScript Format epsi - Encapsulated PostScript Interchange EPT - Empire of the Petal Throne.CLIs are also used by systems with insufficient resources to support a graphical user interface.The default character returned by this API is but can be changed to a hyphen-minus on the above-mentioned systems, except for Datalight ROM-DOS and MS-DOS/PC DOS.0 and higher, which always return / from this call (unless one of many available TSRs to reenable the SwitChar.Option conventions in Unix-like systems edit In Unix-like systems, the ascii hyphen-minus begins options; the new (and GNU ) convention is to use two hyphens then a word (e.g.Many Unix systems feature the PS1 variable (Prompt String 1 9 although other variables also may affect the prompt (depending on the shell used).