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[Translated]How to Change Root Password of MySQL or MariaDB in Linux
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Translating by GOLinux!
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How to Change Root Password of MySQL or MariaDB in Linux
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============================================================
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If you’re [installing MySQL or MariaDB in Linux][1] for the first time, chances are you will be executing mysql_secure_installation script to secure your MySQL installation with basic settings.
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One of these settings is, database root password – which you must keep secret and use only when it is required. If you need to change it (for example, when a database administrator changes roles – or is laid off!).
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**Suggested Read:** [Recover MySQL or MariaDB Root Password in Linux][2]
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This article will come in handy. We will explain how to change a root password of MySQL or MariaDB database server in Linux.
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Although we will use a MariaDB server in this article, the instructions should work for MySQL as well.
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### Change MySQL or MariaDB Root Password
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You know the root password and want to reset it, in this case, let’s make sure MariaDB is running:
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```
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------------- CentOS/RHEL 7 and Fedora 22+ -------------
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# systemctl is-active mariadb
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------------- CentOS/RHEL 6 and Fedora -------------
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# /etc/init.d/mysqld status
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```
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[
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][3]
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Check MySQL Status
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If the above command does not return the word `active` as output or its stopped, you will need to start the database service before proceeding:
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```
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------------- CentOS/RHEL 7 and Fedora 22+ -------------
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# systemctl start mariadb
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------------- CentOS/RHEL 6 and Fedora -------------
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# /etc/init.d/mysqld start
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```
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Next, we will login to the database server as root:
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```
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# mysql -u root -p
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```
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For compatibility across versions, we will use the following statement to update the user table in the mysql database. Note that you need to replace `YourPasswordHere` with the new password you have chosen for root.
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```
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MariaDB [(none)]> USE mysql;
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MariaDB [(none)]> UPDATE user SET password=PASSWORD('YourPasswordHere') WHERE User='root' AND Host = 'localhost';
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MariaDB [(none)]> FLUSH PRIVILEGES;
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```
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To validate, exit your current MariaDB session by typing.
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```
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MariaDB [(none)]> exit;
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```
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and then press Enter. You should now be able to connect to the server using the new password.
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[
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][4]
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Change MySQL/MariaDB Root Password
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##### Summary
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In this article we have explained how to change the MariaDB / MySQL root password – whether you know the current one or not.
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As always, feel free to drop us a note if you have any questions or feedback using our comment form below. We look forward to hearing from you!
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--------------------------------------------------------------------------------
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作者简介：
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Gabriel Cánepa is a GNU/Linux sysadmin and web developer from Villa Mercedes, San Luis, Argentina. He works for a worldwide leading consumer product company and takes great pleasure in using FOSS tools to increase productivity in all areas of his daily work.
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--------------------------------------------------------------------------------
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via: http://www.tecmint.com/change-mysql-mariadb-root-password/
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作者：[Gabriel Cánepa][a]
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译者：[译者ID](https://github.com/译者ID)
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校对：[校对者ID](https://github.com/校对者ID)
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本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出
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[a]:http://www.tecmint.com/author/gacanepa/
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[1]:http://www.tecmint.com/install-mariadb-in-centos-7/
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[2]:http://www.tecmint.com/reset-mysql-or-mariadb-root-password/
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[3]:http://www.tecmint.com/wp-content/uploads/2017/03/Check-MySQL-Status.png
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[4]:http://www.tecmint.com/wp-content/uploads/2017/03/Change-MySQL-Root-Password.png
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[5]:http://www.tecmint.com/author/gacanepa/
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[6]:http://www.tecmint.com/10-useful-free-linux-ebooks-for-newbies-and-administrators/
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[7]:http://www.tecmint.com/free-linux-shell-scripting-books/
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@ -0,0 +1,96 @@
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在 Linux 中修改 MySQL 或 MariaDB 的 Root 密码
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============================================================
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如果你正在首次[安装 MySQL 或 MariaDB][1]，你很有可能会执行 mysql_secure_installation 脚本来进行基本设置以保证 MySQL 安装过程安全。
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其中的一个设置是数据库的 root 密码 —— 该密码必须保密，并且只在必要的时候使用。如果你需要修改它（例如，当数据库管理员换了人 —— 或者被解雇了！）。
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**建议阅读：**[在 Linux 中恢复 MysQL 或 MariaDB 的 Root 密码][2]
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这篇文章迟早会派上用场的。我们讲说明怎样来在 Linux 中修改 MysQL 或 MariaDB 数据库服务器的 root 密码。
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尽管我们会在本文中使用 MariaDB 服务器，但本文中的用法说明对 MySQL 也有效。
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### 修改 MySQL 或 MariaDB 的 Root 密码
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你知道 root 密码，但是想要重置它，对于这样的情况，让我们首先确定 MariaDB 正在运行：
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```
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------------- CentOS/RHEL 7 and Fedora 22+ -------------
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# systemctl is-active mariadb
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------------- CentOS/RHEL 6 and Fedora -------------
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# /etc/init.d/mysqld status
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```
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[
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][3]
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检查 MysQL 状态
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如果上面的命令返回中没有 `active` 这个关键词，那么该服务就是停止状态，你需要在进行下一步之前先启动数据库服务：
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```
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------------- CentOS/RHEL 7 and Fedora 22+ -------------
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# systemctl start mariadb
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------------- CentOS/RHEL 6 and Fedora -------------
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# /etc/init.d/mysqld start
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```
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接下来，我们将以 root 登陆进数据库服务器：
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```
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# mysql -u root -p
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```
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为了兼容不同版本，我们将使用下面的声明来更新 mysql 数据库的用户表。注意，你需要将 `YourPasswordHere` 替换为你为 root 选择的新密码。
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```
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MariaDB [(none)]> USE mysql;
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MariaDB [(none)]> UPDATE user SET password=PASSWORD('YourPasswordHere') WHERE User='root' AND Host = 'localhost';
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MariaDB [(none)]> FLUSH PRIVILEGES;
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```
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要验证，请输入以下命令退出当前 MariaDB 会话。
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```
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MariaDB [(none)]> exit;
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```
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然后，敲回车。你现在应该可以使用新密码连接到服务器了。
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[
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][4]
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修改 MysQL/MariaDB Root 密码
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##### 小结
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在本文中，我们说明了如何修改 MariaDB / MySQL 的 root 密码 —— 或许你知道当前所讲的这个方法，也可能不知道。
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像往常一样，如果你有任何问题或者反馈，请尽管使用下面的评论框来留下你宝贵的意见或建议，我们期待着您的留言。
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--------------------------------------------------------------------------------
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作者简介：
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Gabriel Cánepa是一位来自阿根廷圣路易斯的 Villa Mercedes 的 GNU/Linux 系统管理员和 web 开发者。他为世界范围内的主要的消费产品公司工作，也很钟情于在他日常工作的方方面面中使用 FOSS 工具来提高生产效率。
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--------------------------------------------------------------------------------
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via: http://www.tecmint.com/change-mysql-mariadb-root-password/
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作者：[Gabriel Cánepa][a]
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译者：[GOLinux](https://github.com/GOLinux)
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校对：[校对者ID](https://github.com/校对者ID)
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本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出
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[a]:http://www.tecmint.com/author/gacanepa/
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[1]:http://www.tecmint.com/install-mariadb-in-centos-7/
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[2]:http://www.tecmint.com/reset-mysql-or-mariadb-root-password/
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[3]:http://www.tecmint.com/wp-content/uploads/2017/03/Check-MySQL-Status.png
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[4]:http://www.tecmint.com/wp-content/uploads/2017/03/Change-MySQL-Root-Password.png
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[5]:http://www.tecmint.com/author/gacanepa/
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[6]:http://www.tecmint.com/10-useful-free-linux-ebooks-for-newbies-and-administrators/
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[7]:http://www.tecmint.com/free-linux-shell-scripting-books/
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