1. Check the mysql installed
Command: rpm -qa | grep -i mysql
2. Uninstall mysql
Command: yum remove mysql-community-server-5.6.45-2.el7.x86_64 (version filled in accordance with the actual situation)
View other dependent mysql: rpm -qa | grep -i mysql
Use yum remove mysql-xxx in turn unloaded until all the other rely mysql unloading up
3. Delete the file mysql directory
Use the mysql command to view the associated file directory: find / -name mysql
Rm -rf command to delete files using mysql directory
So far mysql has been successfully uninstalled