给mysql默许root用户设置密码
给mysql默认root用户设置密码 摘自：http://yangtai.blog.51cto.com/334569/213861/ 情况1:如果忘记了 MySQL 的 root 密码，可以用以下方法重新设置： 情况2:添加了phpmyadmin,登录时使用mysql的用户密码登录,但phpmyadmin不能使用空密码登录,即为mysql的root
给mysql默认root用户设置密码摘自：http://yangtai.blog.51cto.com/334569/213861/
情况1:如果忘记了 MySQL 的 root 密码，可以用以下方法重新设置：
情况2:添加了phpmyadmin,登录时使用mysql的用户密码登录,但phpmyadmin不能使用空密码登录,即为mysql的root用户添加密码即可,可直接跳到第3步操作.
步骤:
1. KILL掉系统里的MySQL进程；
2. 用以下命令启动MySQL，以不检查权限的方式启动；
mysqld_safe -skip-grant-tables &
3. 然后用空密码方式使用root用户登录 MySQL；
mysql -u root
4. 修改root用户的密码；
mysql> update mysql.user set password=PASSWORD（'新密码'） where User='root'；
mysql> flush privileges；
mysql> quit
5. 重新启动MySQL，就可以使用新密码登录了
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