20121211 mysqld.sock丢失无法启动mysql和登陆

Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.socket'

mysql无法启动

1,查看mysql的错误日志，到/etc/mysql/my.cnf中找到日志的路径log_error=/var/log/mysql;

121211 12:32:14 [ERROR] Can't start server: Bind on TCP/IP port: Address already in use
121211 12:32:14 [ERROR] Do you already have another mysqld server running on port: 3306
121211 12:32:14 [ERROR] Aborting

发现：端口3306被占用，

用命令：sudo netstat -anp | grep 3306

把占用端口的程序干掉，启动mysql：service mysql start ，好了