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In the case of multiple possible completions, some command-line interpreters, especially Unix shells, will list all possible completions beginning with those few characters. The user can type more characters and press Tab ↹ again to see a new, narrowed-down list if the typed characters are still ambiguous, or else complete the command ...
The Linux enhanced version of getopt has the extra safety of getopts plus more advanced features. It supports long option names (e.g. --help) and the options do not have to appear before all the operands (e.g. command operand1 operand2 -a operand3 -b is permitted by the Linux enhanced version of getopt but does not work with getopts).
A graphical interface similar to one from the late 1980s, which features a TUI window for a man page, a shaped window (oclock) as well as several iconified windows. In the lower right we can see a terminal emulator running a Unix shell, in which the user can type commands as if they were sitting at a terminal.
Windows versions prior to Windows XP; On any drive type, the autorun.inf is read, parsed and instructions followed immediately and silently. [8] The "AutoRun task" is the application specified by the open or shellexecute keys. If an AutoRun task is specified it is executed immediately without user interaction. Windows XP, prior to Service Pack 2
JP Software command-line processors provide user-configurable colorization of file and directory names in directory listings based on their file extension and/or attributes through an optionally defined %COLORDIR% environment variable. For the Unix/Linux shells, this is a feature of the ls command and the terminal.
A Unix shell is a command-line interpreter or shell that provides a command line user interface for Unix-like operating systems. The shell is both an interactive command language and a scripting language , and is used by the operating system to control the execution of the system using shell scripts .
At least three DCL implementations for Windows type operating systems—in addition to XLNT, a multiple-use scripting language package which is used with the command shell, Windows Script Host and CGI programming—are available for these systems as well. Mac OS X and subsequent are Unix-like as well.
In computing, a shell builtin is a command or a function, called from a shell, that is executed directly in the shell itself, instead of an external executable program which the shell would load and execute.