/usr/local/mysql $ bin/mysqld --initialize --user=mysql
mysqld: Can't create directory '/usr/local/mysql/data/' (OS errno 17 - File exists)
2019-02-17T05:49:05.730476Z 0 [System] [MY-013169] [Server] /usr/local/mysql/bin/mysqld (mysqld 8.0.15) initializing of server in progress as process 3115
2019-02-17T05:49:05.793306Z 0 [ERROR] [MY-013236] [Server] Newly created data directory /usr/local/mysql/data/ is unusable. You can safely remove it.
2019-02-17T05:49:05.793390Z 0 [ERROR] [MY-010119] [Server] Aborting
2019-02-17T05:49:05.829621Z 0 [System] [MY-010910] [Server] /usr/local/mysql/bin/mysqld: Shutdown complete (mysqld 8.0.15)  MySQL Community Server - GPL.