centos7在线安装mysql5.7

虽然rhel10都出来很久了，但还是有很多单位的系统是centos7，centos7里并没有mysql5.7的rpm仓库，需要配置mysql官方yum，步骤如下：

1、下载安装源

yum install -y lrzsz wget
yum remove mariadb-libs -y
wget https://dev.mysql.com/get/mysql57-community-release-el7-11.noarch.rpm

2、安装mysql仓库源

rpm -ivh mysql57-community-release-el7-11.noarch.rpm

3、安装mysql

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

yum install mysql-community-server

4、启动mysql

systemctl start mysqld

5、修改初始密码

grep 'temporary password' /var/log/mysqld.log
mysql -uroot -p'r#q=vg5eo<)C'
alter user 'root'@'localhost' identified by 'Zhongguo@0755';
flush privileges;
exit;

###非交互式修改 
[root@liuguohua ~]# mysqladmin -u'root' -p'r#q=vg5eo<)C' password 'liuguohua@com123'

6、如果要安装mysql8

rpm --import https://repo.mysql.com/RPM-GPG-KEY-mysql-2023
yum install -y https://dev.mysql.com/get/mysql80-community-release-el7-7.noarch.rpm