mysql 修改密码的方法
方法一,用mysqladmin
这里使用了到了Mysql自带的两种命令mysqladmin.exe和mysql.exe,mysqladmin修改密码的命令格式如下
<code class="sql">mysqladmin -u root -p[oldpass] password newpass</code>
注意oldpass(老密码)可选,如果root默认密码为空,则不需要输入,如果需要更改老密码,请注意老密码与-p之间不要有空格,否则会报错,另外password和newpass(新密码)之间以空格分隔。
<code class="sql">mysql -u root mysql> SET PASSWORD FOR 'root'@'localhost' = PASSWORD('newpass');</code>
方法二:在DOS模式下(CMD模式)定位到Mysql安装目录下在子目录bin,调用mysql.exe进入,即
<code class="sql">C:Program FilesMySQLMySQL Server 5.1bin>mysql -u root -p Enter password: ******</code>
使用mysqladmin.exe命令来修改Mysql的root密码
一般Mysql的root默认密码为空,如果你之前并没有设置过root密码就使用mysqladmin命令,你可以使用如下mysqladmin命令来修改root密码
<code class="sql">C:Program FilesMySQLMySQL Server 5.1bin>mysqladmin -u root -p password 123456 Enter password: C:Program FilesMySQLMySQL Server 5.1bin>mysql -u root -p123456</code>
如上所述使用mysqladmin第一次修改root的默认密码时,Enter password回车即可,然后使用mysql.exe命令输入root及其密码即可进入Mysql命令行。
如果root已经设置过密码,采用如下方法
<code class="sql">mysqladmin -u root password oldpass "newpass"</code>
方法3: 用UPDATE直接编辑user表
<code class="sql">mysql -u root mysql> use mysql; mysql> UPDATE user SET Password = PASSWORD('newpass') WHERE user = 'root'; mysql> FLUSH PRIVILEGES;</code>
在丢失root密码的时候,可以这样
<code class="sql">mysqld_safe --skip-grant-tables& mysql -u root mysql mysql> UPDATE user SET password=PASSWORD("new password") WHERE user='root'; mysql> FLUSH PRIVILEGES;</code>
使用phpmyadmin来更改Mysql的root密码非常方便,安装配置好phpmyadmin后,首先登陆管理界面,点击右侧修改密码链接,输入你要修改的Mysql的root新密码,最后点击执行即可

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