1、首先需要檢查MySQL的狀態
systemctl status mysqld
2、關閉MySQL服務並設置開機不自啓
systemctl stop mysqld
systemctl disable mysqld
3、搜索相關配置文件並刪除
find / -name mysql
rm -rf /etc/selinux/targeted/active/modules/100/mysql /usr/lib64/mysql /usr/local/mysql /var/lib/mysql
# 以下刪除的內容,如果存在的話,刪除
rm -rf /etc/my.cnf*
rm -rf /etc/init.d/mysqld
4、刪除mysql用戶
id mysql
userdel mysql