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1、查看当前安装的相关包
rpm -qa|grep -i mysql也可能是rpm -qa|grep -i mariadb
2.a、卸载相关包，如
rpm -e --nodeps mysql-community-server-8.0.22-1.el7.x86_64
2.b、删除相关目录，如
#查找mysql相关目录find / -name mysqlrm -rf /var/lib/mysql /var/lib/mysql/mysql /usr/bin/mysql /usr/lib64/mysql /usr/share/mysql /var/log/mysqld.log
3、解压tar安装包
tar -xvf mysql-8.0.22-1.el7.x86_64.rpm-bundle.tar
4、使用yum安装先行依赖包
yum -y install libaioyum -y install perlyum -y install net-tools
5、按顺序安装rpm包
rpm -ivh mysql-community-common-8.0.22-1.el7.x86_64.rpmrpm -ivh mysql-community-client-plugins-8.0.22-1.el7.x86_64.rpm rpm -ivh mysql-community-libs-8.0.22-1.el7.x86_64.rpmrpm -ivh mysql-community-client-8.0.22-1.el7.x86_64.rpmrpm -ivh mysql-community-server-8.0.22-1.el7.x86_64.rpm
6、查看、启动mysqld服务
systemctl status mysqldsystemctl start mysqld
7、第一次登录，使用数据库临时密码（必须先启动mysqld服务）
#查找临时密码grep "temporary password" /var/log/mysqld.log
8、使用临时密码登录，并设置新密码
登录MySQL： mysql -uroot -p如需使用简单密码(MySQL 8.0不支持)： set global validate_password_policy=0; set global validate_password_length=1;设置密码： alter user 'root'@'localhost' identified by '123456'; flush privileges;
9、创建远程登录账号
#MySQL 5.7grant replication slave on *.* to repl@'192.168.73.%' identified by '123456';flush privileges; #MySQL 8.0create user repl@'192.168.73.%' identified by '123456';grant all privileges on *.* to repl@'192.168.73.%' with grant option;flush privileges;
10、使用旧版密码插件
ALTER USER repl@'192.168.73.%' IDENTIFIED BY '123456' PASSWORD EXPIRE NEVER; ALTER USER repl@'192.168.73.%' IDENTIFIED WITH mysql_native_password BY '123456';FLUSH PRIVILEGES;
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