MySQL 8.0 초기화
MySQL 8.0.x.x Initializing the Data Directory
https://dev.mysql.com/doc/refman/8.0/en/data-directory-initialization.html
MySQL :: MySQL 8.0 Reference Manual :: 2.10.1 Initializing the Data Directory
2.10.1 Initializing the Data Directory After MySQL is installed, the data directory must be initialized, including the tables in the mysql system schema: For some MySQL installation methods, data directory initialization is automatic, as described in Secti
dev.mysql.com
[ERROR] --initialize specified but the data directory exists. Aborting.
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In this case, remove or rename the data directory and try again.
An existing data directory is permitted to be nonempty if every entry has a name that begins with a period (.).
그래서 mysql_data 폴더의 모든 데이타 삭제하고 아래와 같이 실행
#/usr/local/mysql/bin/mysqld --initialize-insecure --basedir=/usr/local/mysql --datadir=/usr/local/mysql_data --user=mysql