For Windows, do this:shell> mysql -u rootmysql> SET PASSWORD FOR 'root'@'localhost' = PASSWORD('newpwd');mysql> SET PASSWORD FOR 'root'@'127.0.0.1' = PASSWORD('newpwd');mysql> SET PASSWORD FOR 'root'@'::1' = PASSWORD('newpwd');mysql> SET PASSWORD FOR 'root'@'%' = PASSWORD('newpwd');The last statement is unnecessary if the mysql.user table has no root account with a host value of %.For Unix, do this:shell> mysql -u rootmysql> SET PASSWORD FOR 'root'@'localhost' = PASSWORD('newpwd');mysql> SET PASSWORD FOR 'root'@'127.0.0.1' = PASSWORD('newpwd');mysql> SET PASSWORD FOR 'root'@'::1' = PASSWORD('newpwd');mysql> SET PASSWORD FOR 'root'@'host_name' = PASSWORD('newpwd');You can also use a single statement that assigns a password to all root accounts by using UPDATE to modify the mysql.user table directly. This method works on any platform: You can also use a single statement that assigns a password to all root accounts by using UPDATE to modify the mysql.user table directly. This method works on any platform:shell> mysql -u rootmysql> UPDATE mysql.user SET Password = PASSWORD('newpwd')-> WHERE User = 'root';mysql> FLUSH PRIVILEGES; To assign passwords to the root accounts using mysqladmin, execute the following commands:shell> mysqladmin -u root password "newpwd"shell> mysqladmin -u root -h host_name password "newpwd"If you would like MySQL to start automatically, you can copy support-files/mysql.server to /etc/init.d and create a symbolic link to it named /etc/rc3.d/S99mysql.server.