Can't Use Mongo Command, Shows Command Not Found on Mac

For readers in 2021:

export PATH="$PATH:/usr/local/opt/mongodb-community@3.6/bin"

You'll have to add the location of the Mongo binary to PATH.

Follow the steps below in order to make the PATH variable permanent:

1. Open Terminal and navigate to your user directory.
2. Run touch ~/.bash_profile and then open ~/.bash_profile.
3. In TextEdit, add export PATH="<mongo-directory>/bin:$PATH" (Keep the quote marks - related to white spaces).
4. Save the .bash_profile file and Quit (Command + Q) Text Edit.
5. Run source ~/.bash_profile.
6. Run echo $PATH and check if the you see that the Mongo binary was added.

(*) Notice that the PATH variable is now available only for the current terminal and not to processes that were already started in the session.
In order to make it available outside the current terminal - you'll have to logout and login.

1.Go to your [mongodb installation dir]:

cd <mongodb installation dir>

2.Type ./bin/mongo to start mongo:

./bin/mongo

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Note :

If above command gives error

Failed global initialization: BadValue Invalid or no user locale set. Please ensure LANG and/or LC_ environment variables are set correctly.*

Run bellow command: Read More

export LC_ALL=C

How can find installation directory

find / -name "mongodb" 

You can also set path

export PATH=$PATH:<mongodb installation dir>/bin

documentation

export PATH={mongodb-install-directory}/bin:$PATH

You can navigate to the mongo directory using the command line and then start MongoDB with

./mongodb

I was facing the same problem this worked for me.

you need to install mongodb shell to ge the mongo command working.

Download link

I didn't have the right mongo command line tools installed. This from Brew worked for me though.

brew install mongodb-community

In Mac:

Go into Bash Profile:

vi ~/.bash_profile

Add Path of Installation of MongoDB:

export PATH=$PATH:/usr/local/opt/mongodb-community@4.2/bin

Reload the Bash Profile:

source ~/.bash_profile

just a little recommandation, if your path has a space just wrap the whole path with quote or doublequote example : C:\Program Files\MongoDB\Server\4.2 . notice the space in "Program Files"

export PATH=$PATH:"C:/Program Files/MongoDB/Server/X.X/bin"