2nd Chapter into the shell

several terms Mute terminal (dumb terminal):

A dumb terminal was usually nothing more than

A monitor and keyboard connected to the Unix system via a communication cable (usually a multiwire
Serial cable multi-line serial cable, also called ribbon cable). This simple combination provided a easy-to-enter text data into the Unix
System and view text results.

Console terminal, graphics terminalConsole Terminal:

When the Linux system starts, it automatically creates several virtual consoles. A Virtual
Console is a terminal session this runs in Linux system memory. Instead of having several
Dumb terminals connected to the computer, most Linux distributions start fi ve or six (or
Sometimes even more) virtual consoles so can access from a single computer keyboard
and monitor.

Graphics Terminal:

Using the graphical Linux desktop environment (Linux graphical desktop environment) terminal simulation package (terminal emulation package), the terminal simulation pack simulates working on a dumb terminal, All of them are in a graphical window on the desktop.

The graphical terminal only (graphical terminal emulation) is just a small part of the Linux graphics display. As a whole, the Linux graphics display has several components

Graphical terminal emulation software (graphical terminal emulation software) also called client

the difference and the connection

Although several virtual consoles were created when the Linux system was started, many Linux distributions switched to the graphical environment after the Linux boot sequence was completed, thus logging on to the system through a graphical interface. Therefore, access to virtual terminals (consoles) can only be done by hand.

In most Linux distributions, you can use shortcut keys (ctrl+alt f1~f7) to switch between different terminals. Text-mode virtual terminals are displayed in full-screen, similar to

tty2 Description:

Tty:teletypewriter, a very old device used to send messages.

2: Indicates that you are using a second virtual terminal, that is, you are going to ctrl+alt+f2 switch to the

It is important to note that you can switch back and forth between several virtual terminals without worrying about loss of work. But in a Linux virtual terminal, you can't run any graphics program. This is the egg ache, if I want to run the graphics program what to do?

Using a graphical terminal in a Linux desktop environment

There are many terminal simulation packages available in the Linux graphical desktop environment (terminal emulation package), which provide a set of features to help users, as opposed to traditional virtual terminals (Vsan consoles). Common terminal simulation packages (terminal emulation package) are shown in the table below

Although there are so many Terminal emulation package available, the main one is Gnome Terminal, Konsole Terminal, and xterm. In many Linux distributions, these three are the default graphics terminals.

GNOME Terminal Emulator

Note that the following concepts are differentiated:

Graphics Terminal : The above table in the several

Linux Desktop Environment : GNOME desktop, Ubuntu Unity

Linux distributions : RHEL, Fedora, CentOS

GNOME terminal emulator as the default graphics terminal for GNOME desktop. Since the Linux distributions of Rhel, Fedora and CentOS use GNOME Desktop as their graphical desktop environment, GNOME terminal emulator is the default graphics terminal for Rhel, Fedora, and CentOS. It is important to note that the Ubuntu Unity Desktop environment is also using GNOME terminal emulator as its own graphics terminal.

Konsole Terminal Emulator

The KDE Desktop Project created its own terminal emulation package called Konsole
Terminal. The Konsole package incorporates basic terminal emulation features, along with
Ones expected from a graphical application.

xterm Terminal Emulator

The oldest and most basic of terminal emulation packages are xterm. The Xterm package has
Been around since before the original days of X Window, a popular display server, and it ' s
Often included by default in distributions.
Although Xterm is a full terminal emulation package, it doesn ' t require many resources
(such as memory) to operate. Because of this, the xterm-still popular in Linux
Distributions designed to run on older hardware. Some Graphical Desktop environments use
It as the default terminal emulation package.
Although it doesn ' t offer many fancy features, the xterm package does one thing extremely
Well:it emulates older terminals, such as the Digital equipment Corporation (DEC) VT102,
VT220, and Tektronix 4014 terminals. For the VT102 and VT220 terminals, xterm can even
Emulate the VT series of the color control codes, allowing the use of a color in your scripts.

flexible setting of virtual terminal display effect

2nd Chapter into the shell