MySQL是一个免费的开源数据库管理系统，常用于Web应用程序中，用于存储和检索记录和信息。
MySQL最初由MYSQL AB开发，现在由Oracle Corporation拥有。 它是Linux操作系统的主要数据库应用程序，直到MySQL的一个分支MariaDB才出现。
在本文中，我们将讨论如何在CentOS 7/6，RHEL 7/6和Fedora 28/27/26上安装MySQL 8.0的基本过程。
添加MySQL存储库
MySQL不再通过基本操作系统映像分发或在OS存储库中可用。 因此，您需要添加MySQL的官方存储库来安装MySQL社区服务器。
代码语言：javascript复制### CentOS 7 / RHEL 7 ###
rpm -ivh https://dev.mysql.com/get/mysql80-community-release-el7-1.noarch.rpm
### CentOS 6 / RHEL 6 ###
rpm -ivh https://dev.mysql.com/get/mysql80-community-release-el6-1.noarch.rpm
### Fedora 28 ###
rpm -ivh https://dev.mysql.com/get/mysql80-community-release-fc28-1.noarch.rpm
### Fedora 27 ###
rpm -ivh https://dev.mysql.com/get/mysql80-community-release-fc27-1.noarch.rpm
### Fedora 26 ###
rpm -ivh https://dev.mysql.com/get/mysql80-community-release-fc26-1.noarch.rpm确保使用以下命令添加并启用了MySQL存储库。
代码语言：javascript复制yum repolist all | grep mysql | grep enabled输出：可能看起来像。
代码语言：javascript复制mysql-connectors-community/x86_64 MySQL Connectors Community enabled: 51
mysql-tools-community/x86_64 MySQL Tools Community enabled: 63
mysql80-community/x86_64 MySQL 8.0 Community Server enabled: 17安装 MySQL Community Server
Oracle目前提供稳定版本（v8.0和v5.7）。 您可以选择要在计算机上安装的那个。
安装 MySQL 8.0
在CentOS/RHEL中使用yum命令，在Fedora中使用dnf命令安装最新的稳定版MySQL。
代码语言：javascript复制### CentOS 7/6 & RHEL 7/6 ###
yum -y install mysql-community-server
### Fedora 28/27/26 ###
dnf -y install mysql-community-server安装 MySQL 5.7
如果您想尝试旧版本的MySQL，请在您的计算机上安装MySQL 5.7。
代码语言：javascript复制### CentOS 7/6 & RHEL 7/6 ###
yum -y install mysql-community-server --disablerepo=mysql80-community --enablerepo=mysql57-community
### Fedora 28/27/26 ###
dnf -y install mysql-community-server --disablerepo=mysql80-community --enablerepo=mysql57-community启动 MySQL 服务
安装MySQL后，可以使用以下命令启动MySQL服务器。
代码语言：javascript复制### CentOS 7 / RHEL 7 / Fedora 28/27/26 ###
systemctl start mysqld
### CentOS 6 / RHEL 6 ###
service mysqld start在系统启动时启用MySQL服务器。
代码语言：javascript复制### CentOS 7 / RHEL 7 / Fedora 28/27/26 ###
systemctl enable mysqld
### CentOS 6 / RHEL 6 ###
chkconfig mysqld on使用以下命令验证是否已启动MySQL服务器。
代码语言：javascript复制### CentOS 7 / RHEL 7 / Fedora 28/27/26 ###
systemctl status mysqld
### CentOS 6 / RHEL 6 ###
service mysqld status输出:
CentOS 7 / RHEL 7 / Fedora:
代码语言：javascript复制● mysqld.service - MySQL Server
Loaded: loaded (/usr/lib/systemd/system/mysqld.service; enabled; vendor preset: disabled)
Active: active (running) since Fri 2018-12-04 19:19:36 EDT; 21s ago
Docs: man:mysqld(8)
http://dev.mysql.com/doc/refman/en/using-systemd.html
Main PID: 8452 (mysqld)
Status: "SERVER_OPERATING"
CGroup: /system.slice/mysqld.service
└─8452 /usr/sbin/mysqld
Dec 04 19:19:23 server.itzgeek.local systemd[1]: Starting MySQL Server...
Dec 04 19:19:36 server.itzgeek.local systemd[1]: Started MySQL Server.CentOS 6 / RHEL 6 :
代码语言：javascript复制mysqld (pid 2258) is running...MySQL服务器安全设置
在CentOS/RHEL/Fedora中，可以在/var/log/mysqld.log中找到初始的MySQL root密码。 您可以使用以下命令从日志文件中获取密码。
代码语言：javascript复制cat /var/log/mysqld.log | grep -i 'temporary password'输出:
代码语言：javascript复制2017-11-25T07:02:29.549979Z 1 [Note] A temporary password is generated for root@localhost: Ed*Sn(6R9q0h现在，您需要运行mysql_secure_installation来保护MySQL安装。 此命令负责设置root密码，删除匿名用户，远程禁止root登录等。
代码语言：javascript复制mysql_secure_installation输出:
代码语言：javascript复制Securing the MySQL server deployment.
Enter password for user root: <== Enter Root password taken from previous step
The existing password for the user account root has expired. Please set a new password.
New password: <== Enter New Root Password
Re-enter new password: <== Re-Enter New Root Password
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 which are
secure enough. Would you like to setup VALIDATE PASSWORD plugin?
Press y|Y for Yes, any other key for No: No <== Already high secure enough
Using existing password for root.
Change the password for root ? ((Press y|Y for Yes, any other key for No) : no <== Since the password is already changed in previous step, type no.
... skipping.
By default, a MySQL installation has an anonymous user,
allowing anyone to log into MySQL without having to have
a user account created for them. This is intended only for
testing, and to make the installation go a bit smoother.
You should remove them before moving into a production
environment.
Remove anonymous users? (Press y|Y for Yes, any other key for No) : yes <== Remove Anonymous user
Success.
Normally, root should only be allowed to connect from
'localhost'. This ensures that someone cannot guess at
the root password from the network.
Disallow root login remotely? (Press y|Y for Yes, any other key for No) : yes <== Disable remote root login
Success.
By default, MySQL comes with a database named 'test' that
anyone can access. This is also intended only for testing,
and should be removed before moving into a production
environment.
Remove test database and access to it? (Press y|Y for Yes, any other key for No) : yes <== Remove test database
- Dropping test database...
Success.
- Removing privileges on test database...
Success.
Reloading the privilege tables will ensure that all changes
made so far will take effect immediately.
Reload privilege tables now? (Press y|Y for Yes, any other key for No) : yes <== Reload Privilege
Success.
All done!使用MySQL服务器
使用root用户及其密码登录MySQL服务器。
代码语言：javascript复制mysql -u root -p输出: MySQL 8.0:
代码语言：javascript复制Enter password:
Welcome to the MySQL monitor. Commands end with ; or g.
Your MySQL connection id is 12
Server version: 8.0.11 MySQL Community Server - GPL
Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or 'h' for help. Type 'c' to clear the current input statement.
mysql>MySQL 5.7:
代码语言：javascript复制Enter password:
Welcome to the MySQL monitor. Commands end with ; or g.
Your MySQL connection id is 5
Server version: 5.7.22 MySQL Community Server (GPL)
Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or 'h' for help. Type 'c' to clear the current input statement.
mysql>安装phpMyAdmin
phpMyAdmin是一个基于Web的开源管理工具，用于管理MySQL和MariaDB数据库。 按照以下链接，根据您的操作系统安装和配置phpMyAdmin。
