Zsh: Command Not found : mongo After trying to install mongodb 4.2 using brew - database

Question

I have tried the following steps to install and setup mongodb in my mac from here https://docs.mongodb.com/manual/tutorial/install-mongodb-on-os-x/ but I got the following error when running the final "mongo" command in my terminal:
Error Message - Zsh: Command Not found : mongo
This error msg occurred after trying to install mongodb 4.2 using brew
sudo chown -R $(whoami) $(brew --prefix)/*
then
brew tap mongodb/brew
then
brew install mongodb-community#4.2
and
brew services start mongodb-community#4.2
or
mongod --config /usr/local/etc/mongod.conf
then
ps aux | grep -v grep | grep mongod
and
mongo
running brew services start mongodb-community#4.2 returns:
Successfully started `mongodb-community#4.2` (label: homebrew.mxcl.mongodb-community#4.2)
running ps aux | grep -v grep | grep mongod returns:
9081 0.2 0.5 5528024 41856 ?? S 3:01pm 0:01.48 /usr/local/opt/mongodb-community#4.2/bin/mongod --config /usr/local/etc/mongod.conf
7613 0.0 0.1 4298832 5600 s000 T 2:47pm 0:00.08 vim /usr/local/etc/mongod.conf
running mongod --config /usr/local/etc/mongod.conf returns:
zsh: command not found: mongod
There are also no mongo files in my /usr/local/bin directory after using these commands
I created a data/db folder in my /usr/local/bin directory using the following commands:
sudo mkdir -p /usr/local/bin/data/db
sudo chown -R `id -un` /usr/local/bin/data/db
Running "brew update" returns:
brew update
Updated 1 tap (homebrew/cask).
==> Updated Casks
brave-browser

Answer 1

brew install mongodb-community-shell
Fixed the problem for me.

Answer 2

Solved it by manually installing the mongodb community files and db tools using the website instead. Then copying them into /usr/local/bin. Then ignoring the app permissions whenever calling mongo or related commands in the terminal through System Preferences > Security & Privacy > General.
After googling I found out that mongoimport and the other features have to be installed separately: https://www.mongodb.com/try/download/database-tools
Followed by copying those bin files after extracting them into the same /usr/local/bin directory
Not sure why its' not working through homebrew though

Answer 3

This worked for me, I was having same issue on mongodb-community#4.4
brew reinstall mongodb-community#4.4
On terminal something like this will appear during reinstallation.
copy highlighted path with echo
echo 'export PATH="/opt/homebrew/opt/mongodb-community#4.4/bin:$PATH"' >> ~/.zshrc
Now open another terminal and start mongodb services
brew services restart mongodb/brew/mongodb-community#4.4
write mongo on terminal and here we fly

Answer 4

If you installed the mongodb via Homebrew. Need to add the mongo path in your bash_profile.
Edit the bash_profile vi ~/.bash_profile
Add the below line in EOF export PATH=$PATH:/usr/local/opt/mongodb-community#4.2/bin
After the edit bash_profile. Close all terminals and open them again. mongo command start works.

Answer 5

In addition to #ramesh-babu-t-b 's answer, https://stackoverflow.com/a/68407530/1279516, the issue could also be that your MongoDB installation did add mongod to your path, but the installation happened within the current shell session, and so your shell doesn't have the updates to the PATH variable yet.
In this case, only his last step is still necessary - Open a new console window and retry the mongod command.