DEV Community: SittingDev

Install Node.js on Ubuntu 20.04

SittingDev — Thu, 25 Feb 2021 14:20:28 +0000

Learn how to install Node.js and NPM on Ubuntu 20.04 LTS with this quick tutorial.

Find the latest version of Node.js through the apt repository.

sudo apt-cache show nodejs

The apt repository version is often outdated compared to the latest long-term support version available on the Node.js website. So we will install it from there instead.

Go to the Node.js website - https://nodejs.org/en/.

Click on the 'other downloads' link and navigate to 'install node.js via package manager'.

Go to this URL - https://github.com/nodesource/distributions/blob/master/README.md.

Scroll down until you find the LTS version of Node.js and proceed to the next step.

To install Node.js you will need to make sure you have curl installed.

curl --version

If you need to install curl -

sudo apt install curl

Now go back to the github page we opened and proceed to follow the instructions.

curl -fsSL https://deb.nodesource.com/setup_lts.x | sudo -E bash - sudo apt-get install -y nodejs

Once this has run, you will want to check the version to confirm that node has installed as it should.

node --version

You can also check the NPM version as it was installed with Node in this case.

npm --version

Python PIP Tutorial - Basics for Beginners

SittingDev — Tue, 16 Feb 2021 14:32:16 +0000

In this Python tutorial you will learn the basics of PIP. You will learn how to stay up-to-date, install packages, uninstall packages, and more.

PIP which is known as PIP Installs Python or PIP Installs Packages. Whatever you want to call it... We just call it PIP.

Note - There are some bash commands in this tutorial that may not work for you if you use Windows.

Let's get started.

Want to watch the video tutorial instead?

Tutorial

Check the version you are using. If they are the same you can use either pip or pip3 as you wish.

pip --version pip3 --version

If PIP needs upgrading then you can use the following command.

python -m pip install --upgrade pip

For help you can use the following command.

pip help

For the manual you can use this command.

man pip

List out all installed packages.

pip list

Use some bash commands to filter through your list.

pip list | grep "packagename"

List out more details about a specific package.

pip show packagename

Display a list of all packages along with version.

pip freeze

Output the list into a .txt file.

pip freeze > pip.txt

Output our new file to the console.

cat pip.txt

Install a PIP package

pip install packagename

Install a specific version of a PIP package

pip install packagename==1.0.0

Install multiple PIP packages from a .txt file

pip install -r pip.txt

Uninstall a package

pip uninstall packagename

Install classic Jupyter Notebook on Ubuntu 20.04

SittingDev — Wed, 10 Feb 2021 22:26:23 +0000

Original tutorial appeared on https://sittingdev.com/blog/classic-jupyter-notebook-ubuntu/

In this simple tutorial, you are going to learn how to install the classic version of Jupyter Notebook on Ubuntu 20.04.

For this tutorial, you will need to make sure that you have Python 3 installed.

Note: This tutorial should also work if you are using Ubuntu 18.04 if you have Python 3 installed.

You can check this by opening up a terminal and typing python --version.

If you are using Python 3 then you should already have pip installed.

pip --version

You can update pip by running this command:

python -m pip install -U pip

Now we are ready to install the classic version of jupyter notebook.

In your terminal enter the following pip command:

pip3 install notebook

Before you run the server you might want to create a new directory to hold the files you will be using inside of jupyter.

Go back to the command line in your terminal.

mkdir jupyter-folder cd jupyter-folder

You might want to create a readme file as well.

touch README.md

Now launch the jupyter notebook server in your terminal.

jupyter notebook

You can close the server by hitting ctrl + c and then confirming y you want to quit in the terminal.

Creating a virtual environment for your jupyter notebook folder:

Run the following command:

sudo python3 apt install python3-venv python3 -m venv virtual

Now run the command:

source virtual/bin/activate

You can exit the virtual environment by entering the deactivate command.

Creating a jupyter notebook kernel linked to your virtual environment.

pip3 install ipykernel python3 -m ipykernel install --user --name=virtual

Now run jupyter notebook again.

jupyter notebook

That's it!