Both, all versions have a command line, and every version but minimal and server have a gui
Ubuntu: system-config-printer brings up a GUI printer configuration
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.
Yes, but it also has a command line.
The term "command line interface' is not actually used to describe an operating system, but a type of shell around an operating system. A command line interface is an interface in which you enter commands, arguments and parameters as your primary method of running programs or doing work. Depending on the operating system, the CLI may be the primary method of interfacing with the operating system. Linux (And most Unix/Unix-like systems.) can be primarily CLI driven or GUI driven, since shells are treated as just another application in those systems.
Nothing replaced it, MS-DOS is a command line interface Operating System, it is still used by Windows Operating Systems to this date, but access to it by the user has been severely limited if not completely blocked, to protect the computer from severe user error at the command line level.
xbox
Because a GUI is just executing commands in the command line.
A user communicates with the operating system by using a keyboard. You can also communicate with the operating system by using a mouse.
DOS is Disk Operating System. It is a command-line OS. It means you have to control the computer through codes/commands.
From the command line (in windows) you can access many of windows internal features such as trouble shooting the dll structure and network analysis for more information you can type 'help' in CMD (command line) Most other operating systems have command lines, such as Linux and Ubuntu WARRNING: you can really damage your computer if you don't know what your doing
DOS stands for Disk Operating System. To be useful computers have to have an operating system. The early IBM PC computers used the MS-DOS operating system. A DOS command is an instruction to the DOS operating system. It must be in a specific form. For example, the command DIR told the DOS operating system to list all files. These commands were typed at a place called the DOS command line. There a many such commands.
A shell is software that provides an interface for users of an operating system which provides access to the services of a kernel.Operating system shells generally fall into one of two categories: command-line and graphical. Command-line shells provide a command-line interface (CLI) to the operating system, while graphical shells like the Windows Shell[1][2][3] provide a graphical user interface (GUI).