1.https://dev.mysql.com/downloads/mysql/
2.mkdir -p /usr/local/src 并cd，rz
3.mkdir -p /usr/local/mysql
4.tar -xf mysql-8.0.19-linux-glibc2.12-x86_64.tar
5.mkdir -p /usr/local/data/mysql并cd
6.groupadd mysql
7.useradd -r -g mysql:mysql
8.yum install mysql-server mysql-devel mysql-libs -y
9.systemctl start mysqld
