Linux 上安装 Mysql 设置root密码问题

安装完可以直接使用，但是新版本在安装过程中没有提示设置root用户密码，使用如下方法设置：

<span style="color: #0000ff;">sudo</span> mysql_secure_installation

过程中提示是否开启 VALIDATE PASSWORD PLUGIN，就是设置密码强度检查，自行选择：

<span style="color: #000000;">VALIDATE PASSWORD PLUGIN can be used to test passwords
and improve security. It checks the strength of password
and allows the users to set only those passwords </span><span style="color: #0000ff;">which</span><span style="color: #000000;"> are
secure enough. Would you like to setup VALIDATE PASSWORD plugin</span>?<span style="color: #000000;">
Press y</span>|Y <span style="color: #0000ff;">for</span> Yes, any other key <span style="color: #0000ff;">for</span> No: 

选择是的话会让你选择等级：

LOW    Length >= <span style="color: #800080;">8</span><span style="color: #000000;">
MEDIUM Length </span>>= <span style="color: #800080;">8</span>, numeric, mixed <span style="color: #0000ff;">case</span><span style="color: #000000;">, and special characters
STRONG Length </span>>= <span style="color: #800080;">8</span>, numeric, mixed <span style="color: #0000ff;">case</span>, special characters and dictionary                  <span style="color: #0000ff;">file</span><span style="color: #000000;">
Please enter </span><span style="color: #800080;">0</span> = LOW, <span style="color: #800080;">1</span> = MEDIUM and <span style="color: #800080;">2</span> = STRONG: 

然会会让你输入root密码，注意一定要符合上面你选择的要求：

Please set the password <span style="color: #0000ff;">for</span><span style="color: #000000;"> root here.
New password: 
Re</span>-enter new password: 

输入完之后会显示你的密码的安全性，并提示你是否确认使用这个：

Estimated strength of the password: <span style="color: #800080;">50</span><span style="color: #000000;"> 
Do you wish to continue with the password provided</span>?(Press y|Y <span style="color: #0000ff;">for</span> Yes, any other key <span style="color: #0000ff;">for</span> No) : y

之后就是一些其他方面的设置。。。

最后注意会提示你是否重新加载权限表格：

Reload privilege tables now? (Press y|Y <span style="color: #0000ff;">for</span> Yes, any other key <span style="color: #0000ff;">for</span><span style="color: #000000;"> No) : y
Success.</span>

Linux 上安装 Mysql 设置root密码问题

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