Can't connect to local MySQL server through socket 解决方法

最近我的ubuntu系统sudo装的数据库出现问题，迫于无奈重装，重装启动后用mysql命令客户端连接，出现如下提示：

[LING mysql]$ mysql -u root -p

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

 我的my.cnf如下：

[mysqld]
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock

user=mysql
# Default to using old password format for compatibility with mysql 3.x
# clients (those using the mysqlclient10 compatibility package).
old_passwords=1

[mysqld_safe]
log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid
port=3307

 进入/var/lib/mysql下，发现mysql.sock存在，但/var/run/mysqld下没有mysqld.sock，灵机一动，可以通过软链接的方式使用/var/lib/mysql/mysql.sock：

[ROOT mysqld]$ ln -s /var/lib/mysql/mysql.sock /var/run/mysqld/mysqld.sock

[ROOT mysqld]$ mysqld_safe --log-error=/var/lib/mysql/error.log &

 做链接并启动mysql，查看error.log，如下：

[ROOT mysql]$ more error.log 

InnoDB: The log sequence number in ibdata files does not match
InnoDB: the log sequence number in the ib_logfiles!
100313 10:48:12  InnoDB: Database was not shut down normally!
InnoDB: Starting crash recovery.
InnoDB: Reading tablespace information from the .ibd files...
InnoDB: Restoring possible half-written data pages from the doublewrite
InnoDB: buffer...
100313 10:48:12  InnoDB: Started; log sequence number 0 43655
100313 10:48:12 [Note] /usr/sbin/mysqld: ready for connections.
Version: '5.0.51a-3ubuntu5.5'  socket: '/var/lib/mysql/mysql.sock'  port: 3307  (Ubuntu)
[ROOT mysql]$

 重新链接，成功了！