Hello i can' t able to connect to my MySQL through command line after the fresh installation of MySQL and i don' t set any root password before and keep' s asking for the root password when i press enter.

In order to log into MySQL to secure it, we' ll need the current
password for the root user.  If you' ve just installed MySQL, and
you haven' t set the root password yet, the password will be blank,
so you should just press enter here.
 
Enter current password for root (enter for none):  
ERROR 2002 (HY000): Can' t connect to local MySQL server through socket ' /var/lib/mysql/mysql.sock'  (2)
Enter current password for root (enter for none):