how to mongorestore mongoDB 4.2 to documentDB 4.0?

All we need is an easy explanation of the problem, so here it is.

I need to do mongorestore from my mongodb 4.2 to DocumenDb 4.0 compatible i got the command from aws
which is this

mongorestore --ssl --host="" --username=user --password=pass --sslCAFile rds-combined-ca-bundle.pem dump

but it is showing me this error

[1] 1120
-bash: dGFp: command not found
[[email protected] dump]# 2021-04-06T12:10:48.434+0000        error connecting to host: could not connect to server: server selection error: server selection timeout
current topology: Type: Single
Addr:, Type: Unknown, State: Connected, Average RTT: 0, Last error: connection([-121]) connection is closed

I am able to connect documentdb successfully so i know this is not a connection problem but error occurs when i restore

How to solve :

I know you bored from this bug, So we are here to help you! Take a deep breath and look at the explanation of your problem. We have many solutions to this problem, But we recommend you to use the first method because it is tested & true method that will 100% work for you.

Method 1

This happened because AWS DocumentDB is only mongo 4.0 compatible and I was trying to restore from mongo 4.2, to solve this I just used AWS DMS as it was free, process is simple and there are many tutorials available from AWS and as well as other people on youtube

Note: Use and implement method 1 because this method fully tested our system.
Thank you 🙂

All methods was sourced from or, is licensed under cc by-sa 2.5, cc by-sa 3.0 and cc by-sa 4.0

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