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方法一:# /etc/init.d/mysql stop# mysqld_safe --user=mysql --skip-grant-tables --skip-networking &# mysql -u root mysqlmysql> update user set password=password(newpassword) where user=root;mysql> flush privileges;mysql> quit# /etc/init.d/mysql restart# mysql -uroot -penter password: <输入新设的密码newpassword>mysql>方法二:直接使用/etc/mysql/debian.cnf文件中[client]节提供的用户名和密码:# mysql -udebian-sys-maint -penter password: <输入[client]节的密码>mysql> update user set password=password(newpassword) where user=root;mysql> flush privileges;mysql> quit# mysql -uroot -penter password: <输入新设的密码newpassword>mysql>