＜MySQL＞ Centos 7环境安装MySQL

停止MySQL服务

systemctl stop mariadb.servicesystemctl stop mysqld

禁止MySQL服务开机自启

systemctl disable mysqld

卸载MySQL软件包

yum remove mysql-server mysql-client

删除MySQL数据目录

rm -rf /var/lib/mysql

清理MySQL配置文件

rm -rf /etc/my.cnf

rpm -qa | grep mysql/mariadb

卸载这些默认安装包

sudo rpm -e --nodeps mysql...

Index of /232905 (mysql.com)

选择合适的版本：mysql57-community-release-el7-9.noarch

查看当前yum源

ls /etc/yum.repos.d/ -al

安装MySQL官方yum源

rpm -ivh mysql57-community-release-el7-9.noarch.rpm

看看能不能正常⼯作

yum list | grep mysql

rpm --import https://repo.mysql.com/RPM-GPG-KEY-mysql-2022yum install -y mysql-community-server

ls /etc/my.cnfwhich mysqldwhich mysql

systemctl start mysqld.service

临时密码登录

grep 'temporary password' /var/log/mysqld.logmysql -u root -p

注意：新版本的MySQL没有临时密码，可以直接登录

配置文件免密码登录

vim /etc/my.cnf在最后一行添加skip-grant-tables

systemctl restart mysqld    重启服务mysql -u root -p  直接回车即可登录

systemctl enable mysqldsystemctl daemon-reload

配置⼀下my.conf,主要是数据库客⼾端和服务器的编码格式

vim /etc/my.cnf末尾添加以下两行character-set-server=utf8default-storage-engine=innodb

来源地址：https://blog.csdn.net/ikun66666/article/details/131937245