Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' 的解决办

[root@fc modules]# mysql
ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2)

[root@localhost beinan]# /etc/init.d/mysqld start
启动 MySQL： [ 确定 ]
[root@localhost lib]# mysqladmin -uroot password '123456'
[root@localhost lib]# mysql -uroot -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 3 to server version: 4.1.11

Type 'help;' or '\h' for help. Type '\c' to clear the buffer