Screenshot of 1.0, running on A command-line interface or command language interpreter ( CLI), also known as command-line user interface, console user interface and character user interface ( CUI), is a means of interacting with a where the (or ) issues to the program in the form of successive lines of text (command lines). A program which handles the interface is called a command language interpreter. The CLI was the primary means of interaction with most computer systems on in the mid-1960s, and continued to be used throughout the 1970s and 1980s on, systems and personal computer systems including,.
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The interface is usually implemented with a command line, which is a program that accepts commands as text input and converts commands into appropriate operating system functions. Today, many end users rarely, if ever, use command-line interfaces and instead rely upon and menu-driven interactions. However, many software developers, system administrators and advanced users still rely heavily on command-line interfaces to perform tasks more efficiently, configure their machine, or access programs and program features that are not available through a graphical interface. A sedating dating sim for mac. Alternatives to the command line include, but are not limited to (see for example),, and various other centered on the (usually controlled with a ). Examples of this include the Windows versions 1, 2, 3, 3.1, and 3.11 (an OS shell that runs in DOS),, and Mouse Systems PowerPanel. Programs with command-line interfaces are generally easier to automate via. Command-line interfaces for software other than operating systems include a number of programming languages such as,, and others, as well as such as the utility, and some and / clients.
Screenshot of 's CommandShell in 3.0.1 Compared with a graphical user interface, a command line requires fewer system resources to implement. Since options to commands are given in a few characters in each command line, an experienced user finds the options easier to access. Automation of repetitive tasks is simplified - most operating systems using a command line interface support some mechanism for storing frequently used sequences in a disk file, for re-use; this may extend to a that can take parameters and variable options. 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.
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The command-line environment may not provide the graphical enhancements such as different fonts or extended edit windows found in a GUI. It may be difficult for a new user to become familiar with all the commands and options available, compared with the drop-down menus of a graphical user interface, without repeated reference to manuals. Operating system command-line interfaces [ ] Operating system (OS) command line interfaces are usually distinct programs supplied with the operating system.
A program that implements such a text interface is often called a command-line interpreter, command processor. Examples of command-line interpreters include (DCL) in and, the various (,,,,, etc.), 's, 's, as well as the and the Windows programs, the latter groups being based heavily on DEC's RSX-11 and CLIs. Under most operating systems, it is possible to replace the default shell program with alternatives; examples include for DOS, for OS/2, and or for Windows. Although the term 'shell' is often used to describe a command-line interpreter, strictly speaking a 'shell' can be any program that constitutes the user-interface, including fully graphically oriented ones. For example, the default Windows GUI is a shell program named EXPLORER.EXE, as defined in the SHELL=EXPLORER.EXE line in the WIN.INI configuration file.
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These programs are shells, but not CLIs. Application command-line interfaces [ ] Application programs (as opposed to operating systems) may also have command line interfaces.
An application program may support none, any, or all of these three major types of command line interface mechanisms: • Parameters: Most operating systems support a means to pass additional information to a program when it is launched. When a program is launched from an OS command line shell, additional text provided along with the program name is passed to the launched program. • Interactive command line sessions: After launch, a program may provide an operator with an independent means to enter commands in the form of text. • OS inter-process communication: Most operating systems support means of (for example; or ). Command lines from client processes may be redirected to a CLI program by one of these methods.