Login Environment in Linux

Login Environment in Linux

                

There are two types of Login environment in Linux

1. Graphical User Interface(GUI) by default 1 terminal( can be increased up to 34)
2. Command Line Interface(CLI) by default 6 terminals( Can be increased up to 63)
There are Seven Terminals (6 CLI +1 GUI)  available in Linux where user can login 
and work but we can increase or decrease number of terminals as per our requirement

we can switch between terminals by CTRL+ALT+Function Key

CTRL+ALT+F1        for terminal type 1
CTRL+ALT+F1        for terminal type 2
CTRL+ALT+F1        for terminal type 3
CTRL+ALT+F1        for terminal type 4
CTRL+ALT+F1        for terminal type 5
CTRL+ALT+F1        for terminal type 6
CTRL+ALT+F1        for terminal type 7

In some Linux distributions TTY1(Terminal  Type 1) is by default for graphical but in 
some Linux distribution you will see Seventh terminal for Graphical.
We can switch between Virtual Console and graphical terminal by using above key 
combination.
To switch between terminals we can also use  chvt command.
example:-  chvt  7 

{ To switch in to graphical terminal }below 
To move in to graphical terminal we can also use commands
1.  startx             2.  gdm         3.gdm-restart        4. init  5 

                                          Desktop Environment in Linux
There are three types of Desktop Environment in Linux
1. GNOME
2. KDE
3. XFCE
By default Desktop environment of most linux distributions is GNOME.

GNOME stands for GNU Network Object Model Environment.