Many operating systems provide both a command line and a GUI interface. Windows, for instance, is obviously a GUI, however cmd.exe provides access to the underlying command line interface.
Through CLI (command line interface) or GUI (graphic user interface) interfaces.
Because a GUI is just executing commands in the command line.
Both, all versions have a command line, and every version but minimal and server have a gui
A CLI interface can be implemented on far fewer resources. The CLI is far better for scripting and automated purposes, as well as issuing simple commands. Finally, a CLI interface is generally not subject to copyright, whereas GUIs are.
Yes, but it also has a command line.
Several different versions of UNIX have GUI's or Graphical User Interfaces. The most common example of UNIX with an interface is Mac OS X.
xbox
Yes
Because while less powerful than a command line, they are more usable by unskilled people because they mimic everyday activities that people are familiar with (eg tossing something into the trash to delete it).
A GUI can be used in Unix (in fact, several). Most power users don't use the GUI because it can be too limiting. The power of what you can do in Unix is at the command line, not using a GUI to click on buttons. Of course, this could be said about most operating systems; the GUI is there for user convenience but most administrators use the command line for most of their work.
It is a Graphical User Interface. You can do things visually, using the mouse and you see things as graphics, as opposed to the old command line interfaces, where you just saw text and had to remember and type in commands to use it.
No, GUI stands for Graphic User Interface. It contains graphic contents and you can use all features of OS using that interface only. However you always have a terminal, and you can do things by commandline if you wish.