**I am new novice of opensuse,and the question is how to enter the characters interface in opensuse?? **
If you mean you want to change the keyboard layout you do it in yast > hardware > keyboard
I mean I can enter the interface that I can do something by commands.
For example,Command “rm filename” means delete a file named filename.
Aha should be directly under kicker its called konsole
otherwise applications > system
This is if you using KDE not sure for gnome
For Gnome, on the menu click on Applications and then find/search on Gnome Terminal.
If OP means booting to the command line without starting the gui, then it’s booting into runlevel 3 (by typing a 3 in the command box at the bottom of the boot menu).