完全卸载mysql

1、查看已安装程序

rpm -qa |grep -i mysql

2、逐个卸载

yum remove mysql-community-libs-8.0.28-1.el7.x86_64
yum remove mysql-community-client-plugins-8.0.28-1.el7.x86_64
yum remove mysql-community-server-8.0.28-1.el7.x86_64
yum remove mysql-community-common-8.0.28-1.el7.x86_64
yum remove mysql-community-icu-data-files-8.0.28-1.el7.x86_64
yum remove mysql-community-client-8.0.28-1.el7.x86_64
yum remove mysql80-community-release-el7-5.noarch

 3、找到mysql所有相关目录

find / -name mysql

4、逐个删除

rm -rf /etc/logrotate.d/mysql
rm -rf /root/.m2/repository/mysql
rm -rf /var/lib/mysql
rm -rf /usr/bin/mysql
rm -rf /usr/lib64/mysql
rm -rf /data/user/scm/mysql
rm -rf /data/user/scm/mysql/mysql

5、删除配置文件

rm -rf /etc/my.cnf

6、删除log文件，用于新安装的mysql能正常生成初始密码

rm -rf /var/log/mysqld.log