How do I drop a MongoDB database from the command line?
Like this:
mongo <dbname> --eval "db.dropDatabase()"
More info on scripting the shell from the command line here: https://docs.mongodb.com/manual/tutorial/write-scripts-for-the-mongo-shell/#scripting
The best way to do it is from the mongodb console:
> use mydb;
> db.dropDatabase();
Alternatively, you can stop mongod and delete the data files from your data directory, then restart.
Hint: you can also move the data files to a subfolder, and delete them if you're sure you no longer need them.