centos7.5下安装 MySQL 8 解压版安装详细教程

下载地址
https://dev.mysql.com/downloads/mysql/

系统版本

mysql版本类型

下载之前 先安装 wget：

yum -y install wget

下载mysql8.0:执行如下命令：

wget https://cdn.mysql.com//Downloads/MySQL-8.0/mysql-8.0.18-el7-x86_64.tar.gz

mysql压缩包存放目录：/usr/local/mysql/mysql-8.0.18-el7-x86_64.tar.gz

解压mysql安装包：

tar -zxvf mysql-8.0.18-el7-x86_64.tar.gz

进入mysql-8.0.18-el7-x86_64目录。

编辑mysql配置文件：

vi /etc/my.cnf

修改内容为：

[mysqld]
socket=/usr/local/mysql/mysql-8.0.18-el7-x86_64/mysql.sock
port=3306
user=mysql
basedir=/usr/local/mysql/mysql-8.0.18-el7-x86_64
datadir=/usr/local/mysql/mysql-8.0.18-el7-x86_64/data
max_allowed_packet=128M
[mysqld_safe]
log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid
[client]
port=3306
socket=/usr/local/mysql/mysql-8.0.18-el7-x86_64/mysql.sock

添加mysql 组和用户

groupadd mysql和useradd -r -g mysql mysql

修改相关权限，进入usr/local/mysql/mysql-8.0.18-el7-x86_64目录

cd /usr/local/mysql/mysql-8.0.18-el7-x86_64
chown -R mysql:mysql ./    //修改当前目录为mysql用户

初始化mysql ，进入安装目录下的bin目录：/usr/local/mysql/mysql-8.0.18-el7-x86_64/bin/，执行如下命令：

./mysqld --initialize --user=mysql --basedir=/usr/local/mysql/mysql-8.0.18-el7-x86_64 --datadir=/usr/local/mysql/mysql-8.0.18-el7-x86_64/data

初始化mysql 并得到初始密码

进入/usr/local/mysql/mysql-8.0.18-el7-x86_64/support-files目录，执行./mysql.server start启动mysql

复制启动文件到系统启动路径下：

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

启动如果报错 就报log目录已经文件给最高权限即可
启动命令：service mysqld start
重新启动命令：systemctl restart mysqld.service
启动命令：systemctl start mysqld.service
停止启动命令：systemctl stop mysqld.service
终极启动命令：/etc/init.d/mysql start