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Automation of repetitive tasks is simplified by line editing and history mechanisms for storing frequently used sequences this may extend to a scripting language that can take parameters and variable options. Since options to commands are given in a few characters in each command line, an experienced user often finds the options easier to access. This includes programming environments and utility programs.Ĭomparison to graphical user interfaces Ī graphical user interface with icons and windows ( GEM 1.1 Desktop)Ĭompared with a graphical user interface, a command-line interface requires fewer system resources to implement. Many software systems implement command-line interfaces for control and operation. Programs with command-line interfaces are generally easier to automate via scripting. Command-line interfaces are often implemented in terminal devices that are also capable of screen-oriented text-based user interfaces that use cursor addressing to place symbols on a display screen. Examples of this include the Microsoft Windows, DOS Shell, and Mouse Systems PowerPanel. However, some programming and maintenance tasks may not have a graphical user interface and use a command line.Īlternatives to the command-line interface include text-based user interface menus (for example, IBM AIX SMIT), keyboard shortcuts, and various desktop metaphors centered on the pointer (usually controlled with a mouse). Today, many users rely upon graphical user interfaces and menu-driven interactions. This provided an interactive environment not available with punched cards or other input methods. Such access was first provided by computer terminals starting in the mid-1960s. In some cases the invocation is conditional based on conditions established by the user or previous executables. This provides a means of setting parameters for the environment, invoking executables and providing information to them as to what actions they are to perform. Screenshot of Windows PowerShell 1.0, running on Windows VistaĪ command-line interpreter or command-line processor uses a command-line interface ( CLI) to receive commands from a user in the form of lines of text.