~$ docker run -d \
   --name mymariadb \
   -e MYSQL_ALLOW_EMPTY_PASSWORD=1 \
   -v $(pwd)/mysql:/var/lib/mysql \
   mariadb
6e3a627b6eb504de0f0d38ace231f9214e79c68bbd0193f991e399de0ea96e91
 
~$ ls mysql
aria_log.00000001  ddl_recovery.log  ibdata1  mariadb_upgrade_info  performance_schema/  tc.log   undo002  aria_log_control   ib_logfile0       ibtmp1   mysql/  sys/  undo001  undo003
