mysql数据库启动不了啊。。高分求救啊。。在线等。

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111005 14:50:53 mysqld_safe Starting mysqld daemon with databases from /usr/local/mysql/var
111005 14:50:53 [Warning] '--skip-locking' is deprecated and will be removed in a future release. Please use '--skip-external-locking' instead.
/usr/local/mysql/libexec/mysqld: Table 'mysql.plugin' doesn't exist
111005 14:50:53 [ERROR] Can't open the mysql.plugin table. Please run mysql_upgrade to create it.
111005 14:50:53 [ERROR] Fatal error: Can't open and lock privilege tables: Table 'mysql.host' doesn't exist
111005 14:50:53 mysqld_safe mysqld from pid file /usr/local/mysql/var/ubuntu.pid ended

日志文件里面的错误。。我上网查了下
http://jeck2046.blog.51cto.com/184478/158705/
里面说
解决办法 在运行初始化权限表的时候使用增加参数--datadir ，命令格式为：
shell> scripts/mysql_install_db --user=mysql --datadir=/usr/local/mysql/var

那个"scripts"是什么意思。。还有我改了以后没用啊。。
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root@ubuntu:/usr/local/mysql/bin# shell> ./mysql_install_db --user=mysql --datadir = /usr/local/mysql/var

Please run mysql_upgrade to create it.
不是提示说先执行这个吗？

怎么搞。。求指教。。