1、去官网下载mysql安装包（下面是下载链接，可自行下载）

https://www.mysql.com/downloads/

https://downloads.mysql.com/archives/community/

https://downloads.mysql.com/archives/get/p/23/file/mysql-5.7.36-linux-glibc2.12-x86_64.tar.gz

2、通过xftp将tar包上传到Linux环境下

3、解压安装包，将安装包放到指定目录（这里放到opt下）

tar -zxvf /opt/mysql-5.7.43-el7-x86_64.tar.gz -C /opt

目录替换为自己的目录

4、安装

添加mysql组

groupadd mysql

创建用户mysql并将友好加到组mysql

useradd -g mysql mysql

进入mysql目录下、创建data文件夹

cd /opt/mysql-5.7.43-el7-x86_64/

mkdir data

初始化数据库：指定用户、指定安装目录、指定数据目录

./bin/mysqld --initialize --user=mysql --basedir=/opt/mysql-5.7.43-el7-x86_64 --datadir=/opt/mysql-5.7.43-el7-x86_64/data

注：执行尾部 “0i8!JKQg2Tne”是初始化密码，密码是随机产生的，每次都不一样。

给MySQL文件目录授权 -R是渗透授权

chmod -R 777 /opt/mysql-5.7.43-el7-x86_64

4、制作MySQL启动文件

拷贝启动文件，并改名为mysqld

cp support-files/mysql.server /etc/init.d/mysqld

设置启动文件的权限

chmod 777 /etc/init.d/mysqld

拷贝文件

cp bin/my_print_defaults /usr/bin/

5、修改启动脚本

先修改”**/etc/init.d/mysqld**“

vim /etc/init.d/mysqld

vi /etc/init.d/mysqld

配置MySQL的主目录

basedir=/opt/mysql-5.7.43-el7-x86_64

配置MySQL的数据目录

datadir=/opt/mysql-5.7.43-el7-x86_64/data

配置MySQL的端口

port=3306

然后配置”**/etc/my.cnf**“

vim /etc/my.cnf

[mysqld]
datadir=/opt/mysql-5.7.43-el7-x86_64/data
basedir=/opt/mysql-5.7.43-el7-x86_64
socket=/opt/mysql-5.7.43-el7-x86_64/mysql.sock
user=mysql
tmpdir=/tmp

Disabling symbolic-links is recommended to prevent assorted security risks

symbolic-links=0

Settings user and group are ignored when systemd is used.

If you need to run mysqld under a different user or group,

customize your systemd unit file for mariadb according to the

instructions in http://fedoraproject.org/wiki/Systemd

[mysqld_safe]
log-error=/opt/mysql-5.7.43-el7-x86_64/data/error.log
pid-file=/opt/mysql-5.7.43-el7-x86_64/mysql.pid

include all files from the config directory

!includedir /etc/my.cnf.d

6、配置环境变量

配置环境变量文件 “/etc/profile”

export MYSQL_HOME=/opt/mysql-5.7.43-el7-x86_64

export PATH=$PATH:$MYSQL_HOME/bin

生效环境变量

source /etc/profile

7、启动MySQL服务

service mysqld start

8、登录mysql进行配置

密码输入上面初始化生成的初始化密码：“0i8!JKQg2Tne”

修改密码：注意密码不能太容易。

set password for root@localhost=password('123456');

设置MySQL远程可以登录。

use mysql;

update user set host = '%' where user ='root';

flush privileges;

9、在防火墙上给mysql开3306端口，供用户访问

    firewall-cmd --zone=public --add-port=3306/tcp --permanent 

10、关闭MySQL服务

service mysqld stop