CentOS7下安装MySQL5.7.39的详细过程

下载地址：https://dev.mysql.com/downloads/mysql/

tar xvf mysql-5.7.39-1.el7.x86_64.rpm-bundle.tar 三、卸载已安装包 rpm -qa|grep mariadb
mariadb-libs-5.5.68-1.el7.x86_64 rpm -e nodeps mariadb-libs-5.5.68-1.el7.x86_64 四、按顺序安装rpm包 rpm -ivh mysql-community-common-5.7.39-1.el7.x86_64.rpm
rpm -ivh mysql-community-libs-5.7.39-1.el7.x86_64.rpm
rpm -ivh mysql-community-client-5.7.39-1.el7.x86_64.rpm
// 如果安装 mysql-community-server-5.7.39-1.el7 报 libaio.so.1 依赖错误，需先安装 libaio-0.3.109-13.el7.x86_64.rpm
rpm -ivh libaio-0.3.109-13.el7.x86_64.rpm
rpm -ivh mysql-community-server-5.7.39-1.el7.x86_64.rpm

安装 server 还可能报错：

rpm -ivh mysql-community-server-5.7.39-1.el7.x86_64.rpm
warning: mysql-community-server-5.7.39-1.el7.x86_64.rpm: Header V4 RSA/SHA256 Signature, key ID 3a79bd29: NOKEY
error: Failed dependencies:
net-tools is needed by mysql-community-server-5.7.39-1.el7.x86_64

执行以下命令安装 net-tools 解决：

yum install net-tools -y systemctl start mysqld 六、找到初始密码 cat /var/log/mysqld.log | grep password is generated

七、修改密码并授权 alter user root @ localhost identified by xxxxxx
grant all privileges on *.* to root @ % identified by xxxxxx with grant option;
flush privileges; 八、开启防火墙，允许外网访问 firewall-cmd zone=public add-port=3306/tcp permanent
firewall-cmd reload
firewall-cmd list-ports

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