My SQL

Issues:
1) Conn't connect to mysql gives following error:
    ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2) 


mysqldump -uroot -p****** metastore > /tmp/divakar.sql


mysqldump -uroot -p***** metastore < /tmp/divakar.sql