centos7 rpm 安装mysql

安装依赖环境（这些环境可能已经有了，如果没有就需要安装）

yum install perl -y
yum install libaio -y
yum install net-tools -y
yum install numactl -y

搜索mariadb

rpm -qa | grep mariad

卸载mariadb,与mysql有冲突

rpm -e mariadb-libs-1:5.5.60-1.el7_5.x86_64 --nodeps

下载mysql

wget https://dev.mysql.com/get/Downloads/MySQL-5.7/mysql-5.7.30-1.el7.x86_64.rpm-bundle.tar

解压myqsl

tar -xf mysql-5.7.30-1.el7.x86_64.rpm-bundle.tar

安装mysql

rpm -ivh mysql-community-common-5.7.30-1.el7.x86_64.rpm
rpm -ivh mysql-community-libs-5.7.30-1.el7.x86_64.rpm
rpm -ivh mysql-community-client-5.7.30-1.el7.x86_64.rpm
rpm -ivh mysql-community-server-5.7.30-1.el7.x86_64.rpm

查看默认密码

cd /var/log
grep password mysqld.log

启动mysql

systemctl start mysqld.service

修改默认密码

ALTER USER 'root'@'localhost' IDENTIFIED BY 'new_password';
ALTER USER user() IDENTIFIED BY 'new_password';