mongodump 3.2.1 positional arguments not allowed

Question

trying mongodump with following options and get "positional arguments not allowed"

mongodump --host=hostname --port=27017 --db=db --out=/path --oplog --gzip

tried mongodump -h hostname -d dbname and that works

What does the message

positional arguments not allowed

mean?

Answer 1

You got the syntax wrong in the first one. You need to remove the = sign. See documentation.

mongodump --host hostname --port 27017 --db db --out /path --oplog --gzip

Answer 2

mongodump -d<dbname> -o <backUpPath>

like this:

mongodump -d projectdb -o /Users/zhangzhanqi/Desktop/backup_mongo/aaa