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killall -TERM mysqld
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safe_mysqld --skip-grant-tables &
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mysql -u root
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mysql> quit
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1. Í£Ö¹mysqld£»
  sudo /etc/init.d/mysql stop
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mysqld --skip-grant-tables &
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mysql -u root
4. ÐÞ¸ÄrootÓû§µÄÃÜÂ룻
mysql> update mysql.user set password=PASSWORD('newpassword') where User='root';
mysql> flush privileges;
mysql> quit
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/etc/init.d/mysql restart
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