Download mysql - community - server - 8.0.23-1. El7. X86_64. About 518 MB, the RPM after the installation is complete, to create the installation directory where is it? Whereis mysql only returned:
Mysql:/usr/bin/mysql/usr/lib64/mysql/usr/share/man/man1/mysql. 1. Gz

Start the mysql service, systemctl start mysqld, will create a data directory/var/lib/mysql,

When installation folder/file created by other in what position?

To solve!