gentoo下运行mysql提示Access denied for user 'root'@'localhost'错误的解决

在 gentoo 上安装了 mysql， 但运行时总是的得到这个错误信息：

Access denied for user 'root'@'localhost'

可以这样解决：
# /etc/init.d/mysql stop

# mysqld_safe --user=mysql --skip-grant-tables --skip-networking &

# mysql -u root mysql
mysql> UPDATE user SET Password=PASSWORD('yournewpasswd') where USER='root';
mysql> FLUSH PRIVILEGES;
mysql> quit

# /etc/init.d/mysql restart

搞定。

测试一下：
$ mysqladmin -uroot -pmypasswd ping
mysqld is alive

运行：
$ mysql -uroot -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 6
Server version: 5.0.44-log Gentoo Linux mysql-5.0.44

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

mysql>?