How to Fix the Issue of Jupyter Notebook Not Recognized After Anaconda Installation

This post explains how to resolve the problem where the `Jupyter Notebook` command is not recognized after installing Anaconda on Ubuntu. Step-by-step instructions provided for troubleshooting and solutions. --- This video is based on the question https://stackoverflow.com/q/63091208/ asked by the user 'Kutsit' ( https://stackoverflow.com/u/11044237/ ) and on the answer https://stackoverflow.com/a/63094068/ provided by the user 'Y.P' ( https://stackoverflow.com/u/7095761/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions. Visit these links for original content and any more details, such as alternate solutions, latest updates/developments on topic, comments, revision history etc. For example, the original title of the Question was: Jupyter notebook not recognised even after installing anaconda and notebook Also, Content (except music) licensed under CC BY-SA https://meta.stackexchange.com/help/l... The original Question post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license, and the original Answer post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license. If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com. --- Troubleshooting Jupyter Notebook Not Recognized After Installing Anaconda Installing Anaconda on Ubuntu provides a convenient way to manage Python and its packages, including Jupyter Notebook. However, some users may encounter the frustrating issue of the command not being recognized after installation. In this post, we will explore a common problem and its straightforward solution, helping you get back on track with your data analysis and development projects. The Problem After installing Anaconda, you may successfully run Jupyter Notebook at first. However, some users have reported that after installing other packages like python3.8-dev and gcc, the command Jupiter notebook no longer works. This can lead to some confusion, especially when you can’t access a command that was previously functioning. You might also find that even the python command is not recognized, despite having python3 installed on your system. Understanding the Issue Mistyped Command: The most common reason for the not recognized error is a simple typographical error. The correct command to launch Jupyter Notebook is jupyter notebook, not jupiter notebook. PATH Configuration: Another possibility is that the PATH variable may not have been updated correctly. This variable allows your terminal to locate installed programs and commands. Environment Activation: If you are using Anaconda, it's essential that the correct environment is activated before issuing commands related to Python and its packages. How to Fix the Issue Step 1: Use the Correct Command Ensure that you are using the correct command. The command to start Jupyter is: [[See Video to Reveal this Text or Code Snippet]] Double-check for typos and ensure the command is spelled correctly. Step 2: Check Environment Activation If you have multiple environments in Anaconda, make sure you activate the correct environment where your Jupyter was installed. Use the following command: [[See Video to Reveal this Text or Code Snippet]] Replace myenv with the name of your specific environment. After activating, try running the jupyter notebook command again. Step 3: Check your PATH Configuration To ensure that the Jupyter command is correctly set in your PATH, you can run the following command in the terminal: [[See Video to Reveal this Text or Code Snippet]] Make sure the directory where Jupyter is installed is listed. If it's not, you'll need to add it. Find out the path with: [[See Video to Reveal this Text or Code Snippet]] This should return the path to your Jupyter installation, which usually resides within the Anaconda installation directory. If it isn’t there, you will need to adjust your PATH. Step 4: Reinstall Jupyter Notebook If all else fails, you might want to reinstall Jupyter Notebook. Here's how to do it using conda: First, uninstall the notebook with the command: [[See Video to Reveal this Text or Code Snippet]] Then, reinstall it: [[See Video to Reveal this Text or Code Snippet]] Step 5: Check Python Installation If the Python command is still not recognized, try using: [[See Video to Reveal this Text or Code Snippet]] This should confirm your Python installation. If python is not found, you may need to create an alias in your .bashrc file or simply call python3 whenever you need to run Python scripts. Conclusion Troubleshooting can often feel discouraging, but many common problems like the one discussed can be resolved with a few easy steps. Double-check your commands, activate the right environment, check your PATH, and reinstall if needed. With these measures, you should be back on track to use Jupyter Notebook and continue your proje