linux nodejs reinstall configuration

Linux Node.js Reinstall Configuration

Node.js is a very popular JavaScript runtime environment for building fast, reliable web applications. In the Linux operating system, we can easily install Node.js through the package management system (such as apt, yum, etc.). But in some cases, you may need to reinstall or configure Node.js. This article will guide you on how to reinstall and configure Node.js on Linux.

Step 1 - Remove the old version of Node.js

Before installing the new version, you need to uninstall the old version of Node.js. You can do this using the following command:

sudo apt remove nodejs

Please note that this will only uninstall Node.js. If you previously used npm to manage packages, you will need to uninstall npm separately.

sudo apt remove npm

After executing the above command, Node.js and npm will be uninstalled.

Step 2 - Update the global package using npm

Before reinstalling Node.js, it is recommended to use the following command to update the global package to the latest version:

sudo npm update -g

This will ensure your global packages are up to date and better compatible with new Node.js versions.

Step 3 - Install the new version of Node.js

After uninstalling the old version and updating the global packages, you can now install the new Node.js version. You can download the Node.js binary from the official website or install it using the package management system. Here we’ll cover how to install using a package management system:

1. Building a PPA

One way to install the latest version of Node.js in Ubuntu is through a PPA (Personal Package Archives). We need to add the Node.js PPA to the system first. Add the PPA using the following command:

curl -sL https://deb.nodesource.com/setup_14.x | sudo -E bash -

The above command will download a script and execute it, to add PPA to Ubuntu.

2. Install Node.js

After adding the PPA, you can install Node.js on your system using the following command:

sudo apt install -y nodejs

This will automatically install Node.js and npm.

3. Verify installation

After Node.js is installed, you can verify that it was installed correctly by running the following command:

node -v

It will display the version number of Node.js. You can also verify that npm is installed correctly with the following command:

npm -v

It will display the version number of npm.

Step 4 - Configure npm

If you installed a new version, you need to configure npm before using npm. The first thing is to create an npmrc file:

touch ~/.npmrc

Then you can configure npm to install the package to a global location using the following command:

npm config set prefix /usr/local

This will allow npm to install packages to global locations and you will not have to use sudo to run npm commands.

Step 5 - Install common software packages

After updating and reinstalling Node.js, you can install some common software packages, such as express, pm2, nodemon, etc.:

sudo npm install -g express pm2 nodemon

This will install these packages using the global flag (-g).

Conclusion

Reinstalling and configuring Node.js is not very difficult. By following the above steps correctly, you can reinstall and configure Node.js on your Linux system and start building fast, reliable web applications.

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