1、环境说明

操作系统：centos7.5

MySQL版本：mysql5.6

2、具体步骤

1.官网(https://dev.mysql.com/downloads/mysql/)下载mysql5.6.46安装包

wget https://cdn.mysql.com//Downloads/MySQL-5.6/mysql-5.6.46-linux-glibc2.12-x86_64.tar.gz

2.安装包解压

tar -zxvf mysql-5.6.46-linux-glibc2.12-x86_64.tar.gz

3.目录重命名

mv mysql-5.6.46-linux-glibc2.12-x86_64 /usr/local/mysql5.6

4.创建mysql用户和组

groupadd mysql

useradd -r -g mysql mysql -d /usr/local/mysql5.6

5.修改目录权限

chown -R mysql:mysql /usr/local/mysql5.6

6.安装数据库

切换到mysql:     su mysql

执行：/usr/local/mysql5.6/scripts/mysql_install_db --user=mysql --basedir=/usr/local/mysql5.6 --datadir=/usr/local/mysql5.6/data

7.复制mysql配置文件

cd /usr/local/mysql5.6/support-files

cp my-default.cnf /etc/my.cnf

8.添加系统服务

cp mysql.server /etc/init.d/mysql

chkconfig mysql on

9.添加环境变量

vi /etc/profile

在最下面添加

export MYSQL_HOME=/usr/local/mysql5.6

export PATH=$PATH:$MYSQL_HOME/bin

保存退出后，执行生效代码

source /etc/profile

10.设置默认端口

vi /etc/my.cnf

[mysqld]

basedir=/usr/local/mysql5.6

datadir=/usr/local/mysql5.6/data

port=3306

server_id=1

socket=/tmp/mysql.sock

11.编辑mysql启动脚本

vi /etc/init.d/mysql

basedir=/usr/local/mysql5.6

datadir=/usr/local/mysql5.6/data

12.启动mysql

service mysql start

13.设置root密码

mysqladmin -u root password '123456'

14.允许所有外部链接访问（可选）

mysql -u root -p

mysql命令行输入

GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY '123456' WITH GRANT OPTION;

FLUSH PRIVILEGES;