Where is the parameter in docker -run in the container

  docker, question

I have an order:
docker run -d -p 3306:3306 -v /download/mysqldata/:/var/lib/mysql -e MYSQL_ROOT_PASSWORD=123456 cb4d7ccf2eea

The setting of -e MYSQL_ROOT_PASSWORD=123456 was not successful. I want to enter the container to reconfigure. Excuse me, where is this parameter?

Attach in, executeexportYou can see it
Redefinition is executedexport MYSQL_ROOT_PASSWORD=123456