Answers for "how to check user privileges in mysql command line"

mysql users and privileges list

SELECT * FROM mysql.user;

SELECT * FROM information_schema.user_privileges;
SELECT CONCAT('SHOW GRANTS FOR ''',user,'''@''',host,''';') FROM mysql.user;
SHOW GRANTS FOR 'my_user'@'localhost';

how to know mysql user privileges on a given database?

SHOW GRANTS FOR 'user_name';