下载文件wgethttps://dev.mysql.com/get/Downloads/MySQL-8.0/mysql-8.0.39-linux-glibc2.28-x86_64.tar.xz解压到目录在文件夹建立my.cnf配置文件[client]port=3309socket=/data/mysql83309/mysqld.sock[mysqld_safe]socket=/data/mysql83309/mysqld.sock[mysq