一、下载地址

本文安装的版本：

或者使用wget下载：

[root@localhost opt]# wget https://dev.mysql.com/get/Downloads/MySQL-5.7/mysql-5.7.32-el7-x86_64.tar.gz

[root@localhost opt]# tar -xvf mysql-5.7.32-el7-x86_64.tar.gz

二、检查是否已经安装过mysql

[root@localhost opt]# rpm -qa | grep mysql

# 若出现：mysql-libs*

[root@localhost /]# rpm -e --nodeps mysql-libs* #进行卸载

# 再次执行查询命令，查看是否删除

[root@localhost /]# rpm -qa | grep mysql

# 若没有mysql字样出现，说明mysql已卸载

# 查询所有Mysql对应的文件夹

[root@localhost /]# whereis mysql

mysql: /usr/bin/mysql /usr/include/mysql

[root@localhost lib]# find / -name mysql

/data/mysql

/data/mysql/mysql

# 删除相关目录或文件

[root@localhost /]# rm -rf /usr/bin/mysql /usr/include/mysql /data/mysql /data/mysql/mysql

三、安装

[root@localhost opt]# mv mysql-5.7.32-el7-x86_64 /usr/local/mysql

[root@localhost opt]# mkdir /usr/local/mysql/data

[root@localhost opt]# groupadd mysql

[root@localhost opt]# useradd -r -g mysql mysql

[root@localhost opt]# chown mysql:mysql -R /usr/local/mysql

[root@localhost mysql]# vim /etc/my.cnf.d/mysql-clients.cnf

[root@localhost opt]# cd /usr/local/mysql/bin/

[root@localhost bin]# ./mysqld --defaults-file=/etc/my.cnf --basedir=/usr/local/mysql --datadir=/usr/local/mysql/data --user=mysql --initialize

[root@localhost bin]# ln -s /usr/local/mysql/bin/mysql /usr/bin/mysql

[root@localhost bin]# service mysql start

[root@localhost bin]# mkdir /var/log/mariadb

[root@localhost bin]# touch /var/log/mariadb/mariadb.log

[root@localhost bin]# chown mysql:mysql -R /var/log/mariadb

[root@localhost bin]# service mysql start

四、RPM安装：

下载下图中的四个包：

[root@localhost ~]# cd /opt

[root@localhost opt]# wget https://dev.mysql.com/get/Downloads/MySQL-5.7/mysql-community-server-5.7.32-1.el7.x86_64.rpm

[root@localhost opt]# wget https://dev.mysql.com/get/Downloads/MySQL-5.7/mysql-community-common-5.7.32-1.el7.x86_64.rpm

[root@localhost opt]# wget https://dev.mysql.com/get/Downloads/MySQL-5.7/mysql-community-libs-5.7.32-1.el7.x86_64.rpm

[root@localhost opt]# wget https://dev.mysql.com/get/Downloads/MySQL-5.7/mysql-community-client-5.7.32-1.el7.x86_64.rpm

[root@localhost opt]# rpm -qa|grep mariadb

mariadb-libs-5.5.52-1.el7.x86_64

[root@localhost opt]# rpm -e mariadb-libs-5.5.52-1.el7.x86_64

[root@localhost opt]# rpm -e --nodeps mariadb-libs-5.5.52-1.el7.x86_64

[root@localhost opt]# rpm -ivh mysql-community-common-5.7.32-1.el7.x86_64.rpm

[root@localhost opt]# rpm -ivh mysql-community-libs-5.7.32-1.el7.x86_64.rpm

[root@localhost opt]# rpm -ivh mysql-community-client-5.7.32-1.el7.x86_64.rpm

[root@localhost opt]# rpm -ivh mysql-community-server-5.7.32-1.el7.x86_64.rpm

[root@localhost opt]# systemctl start mysqld

四、修改MySQL密码及开发远程连接

修改MySQL初始密码：

[root@localhost bin]# mysql -uroot -p

Enter password:

mysql> alter user 'root'@'localhost' identified by '新密码';

退出，使用新密码重新登陆

开放远程连接

mysql> grant all privileges on *.* to 'root'@'%' identified by '密码';