mysql 通过rpm方式安装，卸载方式如下
1.关闭mysql
service mysqld stop


2.查找mysql 安装情况
rpm -qa|grep -i mysql

mysql-8.0.17-3.module_el8.0.0+181+899d6349.x86_64
mysql-server-8.0.17-3.module_el8.0.0+181+899d6349.x86_64
mysql-common-8.0.17-3.module_el8.0.0+181+899d6349.x86_64
mysql-errmsg-8.0.17-3.module_el8.0.0+181+899d6349.x86_64
mysql80-community-release-el8-1.noarch


可以看到安装项目有上面几项

3.卸载mysql
rpm -ev     卸载意思
rpm -ev mysql-server-8.0.17-3.module_el8.0.0+181+899d6349.x86_64<