1. When i login..type the login name...and when i type the password..can't type the password....or can't see the asterisk..? Is somebody lock my Suse?
You can set up KDM/GDM to display either a masking symbol (eg 1 or 3 asterisks) the password or in the UNIX tradition staying blank.
Should you ever encounter older UNIX systems you see that they do not display anything should you type your password in.