##help～～linux7.3下mysql启动不了

foolfei

7.3自带的mysql
运行_safemysqld时,如下
[root@C01 root]# safe_mysqld
Starting mysqld daemon with databases from /var/lib/mysql
030423 09:53:10  mysqld ended

运行mysql时,如下
[root@C01 root]# mysql -u root
ERROR 2002: Can't connect to local MySQL server through socket
'/var/lib/mysql/mysql.sock' (111)

我看了mysql.sock一下这个文件,0字节.
于是,我下了一个rpm的新版本准备安装,出现下面的错误
[root@C01 TOOLS]# rpm -ivh MySQL-server-4.0.12-0.i386.rpm
error: failed dependencies:
        MySQL-server conflicts with mysql-server-3.23.49-3
        MySQL conflicts with mysql-3.23.49-3   
谁能指点我到底是那里出了问题,3x