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修改密码：
mysql> grant all privileges on *.* to yongfu_b@‘192.168.1.%‘ identified by ‘my_password_new‘;
新建用户：
mysql> grant all privileges on *.* to yongfu_b@‘192.168.1.%‘ identified by ‘my_password_2‘;
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原文地址：http://www.cnblogs.com/jh1994/p/5022685.html
