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use mysql
update user set Password=password('newpassword') where User='root';
flush privileges;
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MYSQLADMIN -u root -p PASSWORD mypasswd
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mysql> SET PASSWORD FOR myuser@localhost = PASSWORD('mypasswd');
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mysql> GRANT USAGE ON *.* TO myuser@localhost IDENTIFIED BY 'mypassword';
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[root@test1 local]# rpm -ivh MySQL-server-5.0.26-0.i386.rpm
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warning: MySQL-server-5.0.26-0.i386.rpm: V3 DSA signature: NOKEY, key ID 5072e1f5
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