Error 2002, no se puede accesar a mysql

[jglorenzosqr]

# mysql -u root
ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2)

# ps -x |grep mysql
Warning: bad ps syntax, perhaps a bogus '-'? See http://procps.sf.net/faq.html
5102 pts/2 R+ 0:00 grep mysql

#/etc/init.d/mysql stop
Stopping MySQL database server: mysqld.

# mysql -u root -p
Enter password:
ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2)