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How To Fix Unmet Dependencies Error When Installing MongoDB on Ubuntu 20.04

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In this article, we will guide you through the process of fixing unmet dependencies errors when installing MongoDB on Ubuntu 20.04. This is a common issue that many users face while installing MongoDB, and it can be resolved by following a few simple steps.

Quick Answer

To fix the unmet dependencies error when installing MongoDB on Ubuntu 20.04, you need to remove all MongoDB repositories, install necessary dependencies, add the MongoDB repository key and repository, update package lists and upgrade the system, install MongoDB, start the MongoDB service, and check the service status.

Understanding the Problem

Before we dive into the solution, it’s important to understand what unmet dependencies are. In the context of Ubuntu and other Debian-based systems, dependencies are the packages that a software needs to function correctly. If these dependencies are not met, the software may not install or function as expected.

When you try to install MongoDB on Ubuntu 20.04 and encounter an unmet dependencies error, it means that the MongoDB package requires some other packages to be installed on your system, but they are not available or not installed.

Step-by-Step Solution

Step 1: Remove all MongoDB Repositories

First, you need to remove all the PPA (Personal Package Archive) repositories for MongoDB. This can be done by running the following commands in your terminal:

sudo apt-get purge mongodb-org*
sudo apt remove mongodb
sudo apt purge mongodb
sudo apt autoremove
sudo rm -r /var/log/mongodb
sudo rm -r /var/lib/mongodb

These commands will remove all the MongoDB-related packages and configurations from your system.

Step 2: Install Necessary Dependencies

Next, you need to install the necessary dependencies. This can be done by running the following commands:

sudo apt-get install gnupg
sudo apt-get install libc6

These commands will install the gnupg and libc6 packages, which are necessary for MongoDB.

Step 3: Add MongoDB Repository Key

Now, you need to add the MongoDB repository key to your system. This can be done by running the following command:

wget -qO - https://www.mongodb.org/static/pgp/server-4.4.asc | sudo apt-key add -

This command downloads the MongoDB repository key using wget and adds it to your system using apt-key add.

Step 4: Add MongoDB Repository

Next, you need to add the MongoDB repository to your system. This can be done by running the following command:

echo "deb [ arch=amd64,arm64 ] https://repo.mongodb.org/apt/ubuntu focal/mongodb-org/4.4 multiverse" | sudo tee /etc/apt/sources.list.d/mongodb-org-4.4.list

This command adds the MongoDB repository to your system’s list of repositories.

Step 5: Update Package Lists and Upgrade the System

Now, you need to update the package lists and upgrade your system. This can be done by running the following commands:

sudo apt-get update
sudo apt-get upgrade
sudo apt update
sudo apt upgrade

These commands update the package lists for the software that you have installed and upgrade the software on your system.

Step 6: Install MongoDB

Now, you can install MongoDB by running the following command:

sudo apt-get install -y mongodb-org

This command installs the mongodb-org package on your system.

Step 7: Start MongoDB Service

Next, you need to start the MongoDB service. This can be done by running the following command:

sudo service mongod start

This command starts the MongoDB service on your system.

Step 8: Check MongoDB Service Status

Finally, you can check the status of the MongoDB service by running the following command:

sudo service mongod status

This command checks the status of the MongoDB service on your system.

Conclusion

By following these steps, you should be able to resolve the unmet dependencies error when installing MongoDB on Ubuntu 20.04. If you still encounter any issues, it is recommended to refer to the official MongoDB documentation or seek further assistance.

What is an unmet dependencies error?

An unmet dependencies error occurs when a software package requires other packages to be installed on your system, but those dependencies are either not available or not installed.

How can I fix unmet dependencies errors when installing MongoDB on Ubuntu 20.04?

To fix unmet dependencies errors when installing MongoDB on Ubuntu 20.04, you can follow the step-by-step solution outlined in this article. It involves removing all MongoDB repositories, installing necessary dependencies, adding the MongoDB repository key and repository itself, updating package lists, upgrading the system, installing MongoDB, starting the MongoDB service, and checking the service status.

How do I remove all MongoDB repositories?

To remove all MongoDB repositories, you can run the following commands:

sudo apt-get purge mongodb-org*
sudo apt remove mongodb
sudo apt purge mongodb
sudo apt autoremove
sudo rm -r /var/log/mongodb
sudo rm -r /var/lib/mongodb
What dependencies do I need to install for MongoDB on Ubuntu 20.04?

You need to install the gnupg and libc6 packages as they are necessary for MongoDB. You can install them by running the following commands:

sudo apt-get install gnupg
sudo apt-get install libc6
How do I add the MongoDB repository key?

To add the MongoDB repository key, you can run the following command:

wget -qO - https://www.mongodb.org/static/pgp/server-4.4.asc | sudo apt-key add -
How do I add the MongoDB repository?

To add the MongoDB repository, you can run the following command:

echo "deb [ arch=amd64,arm64 ] https://repo.mongodb.org/apt/ubuntu focal/mongodb-org/4.4 multiverse" | sudo tee /etc/apt/sources.list.d/mongodb-org-4.4.list
How do I update package lists and upgrade the system?

To update package lists and upgrade the system, you can run the following commands:

sudo apt-get update
sudo apt-get upgrade
sudo apt update
sudo apt upgrade
How do I install MongoDB on Ubuntu 20.04?

To install MongoDB on Ubuntu 20.04, you can run the following command:

sudo apt-get install -y mongodb-org
How do I start the MongoDB service?

To start the MongoDB service, you can run the following command:

sudo service mongod start
How do I check the status of the MongoDB service?

To check the status of the MongoDB service, you can run the following command:

sudo service mongod status

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