这是mysql在linux系统里的rpm安装包，里面有 mysql-community-client-5.7.31-1.el7.x86_64.rpm，mysql-community-common-5.7.31-1.el7.x86_64.rpm，mysql-community-libs-5.7.31-1.el7.x86_64.rpm，mysql-community-libs-compat-5.7.31-1.el7.x86_64.rpm，mysql-community-server-5.7.31-1