How to find out if MongoDB is installed?

1. Command Line Check

• Open a terminal or command prompt.
• Type the following command and press Enter:

mongod --version

• If MongoDB is installed, it will display the version of the MongoDB shell (e.g., MongoDB shell version v4.4.10).
• If the command is not recognized, it means MongoDB is not installed or is not added to the system’s PATH.

2. Check MongoDB Server

• Run the following command to check if the MongoDB server is installed and accessible:

mongod --version

• If installed, it will show the version of the MongoDB server.

3. Search for MongoDB Files

• Check common installation directories:
  • Linux: /usr/bin/mongo, /usr/bin/mongod
  • MacOS: /usr/local/bin/mongo, /usr/local/bin/mongod
  • Windows: Look in the C:\Program Files\MongoDB directory.
• Use a search tool or command to locate MongoDB binaries:

which mongo

Or

find / -name mongo 2>/dev/null

4. Check Services (Linux/Windows)

• Linux: Use the systemd command to see if MongoDB is running:

sudo systemctl status mongod

• Windows: Check the “Services” panel (services.msc) for MongoDB or MongoDB Server.

5. Alternative: Package Manager

• Linux: Use your package manager to see if MongoDB is installed:

dpkg -l | grep mongodb  # Debian/Ubuntu
rpm -qa | grep mongodb  # CentOS/RHEL

• MacOS: Check with Homebrew:

brew list | grep mongodb

• Windows: Check “Apps & Features” or the Control Panel for MongoDB entries.

If MongoDB is not installed, you can download it from the official MongoDB website or install it via a package manager suitable for your system.

Here is another link if you have issues with the first one MongoDB Community Edition install.