MySQL5.7.29_yum安装.txt

rpm -e mariadb-libs.x86_64 --nodeps
cd /opt

wget https://mirrors.tuna.tsinghua.edu.cn/mysql/yum/mysql57-community-el7/mysql-community-client-5.7.29-1.el7.x86_64.rpm
wget https://mirrors.tuna.tsinghua.edu.cn/mysql/yum/mysql57-community-el7/mysql-community-common-5.7.29-1.el7.x86_64.rpm
wget https://mirrors.tuna.tsinghua.edu.cn/mysql/yum/mysql57-community-el7/mysql-community-devel-5.7.29-1.el7.x86_64.rpm
https://mirrors.tuna.tsinghua.edu.cn/mysql/yum/mysql57-community-el7/mysql-community-embedded-5.7.29-1.el7.x86_64.rpm
https://mirrors.tuna.tsinghua.edu.cn/mysql/yum/mysql57-community-el7/mysql-community-embedded-compat-5.7.29-1.el7.x86_64.rpm
https://mirrors.tuna.tsinghua.edu.cn/mysql/yum/mysql57-community-el7/mysql-community-embedded-devel-5.7.29-1.el7.x86_64.rpm
wget https://mirrors.tuna.tsinghua.edu.cn/mysql/yum/mysql57-community-el7/mysql-community-libs-5.7.29-1.el7.x86_64.rpm
https://mirrors.tuna.tsinghua.edu.cn/mysql/yum/mysql57-community-el7/mysql-community-libs-compat-5.7.29-1.el7.x86_64.rpm
wget https://mirrors.tuna.tsinghua.edu.cn/mysql/yum/mysql57-community-el7/mysql-community-server-5.7.29-1.el7.x86_64.rpm
https://mirrors.tuna.tsinghua.edu.cn/mysql/yum/mysql57-community-el7/mysql-community-test-5.7.29-1.el7.x86_64.rpm

yum install mysql-community-client-5.7.29-1.el7.x86_64.rpm  mysql-community-libs-5.7.29-1.el7.x86_64.rpm  mysql-community-common-5.7.29-1.el7.x86_64.rpm  mysql-community-server-5.7.29-1.el7.x86_64.rpm  mysql-community-devel-5.7.29-1.el7.x86_64.rpm

systemctl start mysqld.service
systemctl status mysqld.service 
systemctl enable mysqld.service 


此时MySQL已经开始正常运行，不过要想进入MySQL还得先找出此时root用户的密码，通过如下命令可以在日志文件中找出密码：
grep "password" /var/log/mysqld.log
0wkli%No.k.1

mysql -uroot -p
  输入初始密码，此时不能做任何事情，因为MySQL默认必须修改密码之后才能操作数据库：
ALTER USER 'root'@'localhost' IDENTIFIED BY 'Qwert#1234';

ERROR 1819 (HY000): Your password does not satisfy the current policy requirements  -- 密码复杂度问题