[Tutorial] Installing nodejs and npm

learning/dashboard/group9/readme.md

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+# How to install and setup NodeJS and npm?
+- **step 1:**
+Open the Terminal on your Ubuntu system. You can do this by pressing the **"Ctrl+Alt+T"** keys simultaneously.
+- **step 2:**
+Update your package list by typing the following command in the Terminal:
+
+   `sudo apt-get update`
+ - **step3:**
+  Install Nodejs using the following command: 
+
+    `sudo apt get install node js`
+  - **step4:**
+   Check if Node.js is installed by typing the following command:
+
+    `node -v`
+
+    This will display the version number of Node.js installed on your system.
+   - **step5:**
+Install NPM (Node Package Manager) by typing the following command:
+
+      `sudo apt-get install npm`
+   - **step6:**
+    Check if NPM is installed by typing the following command:
+
+      `npm -v`
+   - **step7:**
+      If you encounter any issues with the installation, you can try updating the package list again by typing the following command:
+
+        `sudo apt-get update`
+
+       Then repeat steps 3-6.
+## Steps to update the nodejs and npm versions
+
+- **step 1:**
+Open the Terminal on your Ubuntu system.
+- **step 2:**
+Check the currently installed versions of Node.js and NPM by typing the following commands:
+
+   `node -v npm -v`
+ - **step3:**
+ To update Node.js, you can use the Node Version Manager (nvm) tool. If you do not have nvm installed, you can install it using the following command:
+
+
+   curl -o- [https://raw.githubusercontent.com/nvm-sh/nvm/v0.39.0/install.sh](https://raw.githubusercontent.com/nvm-sh/nvm/v0.39.0/install.sh) | bash
+  - **step4:**
+ Once nvm is installed, you can use it to install the latest version of Node.js by typing the following command:
+
+    `nvm install node`
+
+    This will install the latest version of Node.js. You can verify the version by typing the following command:
+
+    `node -v`
+   - **step5:**
+To update NPM to the latest version, you can use the following command:
+
+     `npm install -g npm@latest`
+
+     This will install the latest version of NPM globally. You can verify the version by typing the following command:
+
+     `npm -v`
+
+     If you want to update NPM for a specific project, you can navigate to the project directory and run the above command without the -g flag.
+## How to manage multiple versions of node.js and npm using nvm
+
+ - **Step1:**
+       Install nvm on your Ubuntu system by running the following command in your terminal:
+
+      ` curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.39.0/install.sh | bash`
+
+     This will download and install the latest stable version of nvm.
+ - **Step2:**
+Once nvm is installed, you can use it to install and manage different versions of Node.js by running the following command:
+
+     `nvm install <node_version>`
+
+    Replace **<node_version>** with the version of Node.js you want to install, such as "14.18.1". This will download and install the specified version of Node.js.
+
+- **Step3:**
+ use a specific version of Node.js, you can run the following command:
+
+   `nvm use <node_version>`
+
+  This will set the specified version of Node.js as the active version.
+
+- **Step4:**
+  You can also set a default version of Node.js by running the following command:
+
+     `nvm alias default <node_version>`
+
+    This will set the specified version of Node.js as the default version that will be used when you open a new terminal window.
+
+- **Step5:**
+    To check the currently installed versions of Node.js, you can run the following command:
+
+      `nvm ls`
+
+    This will show a list of all the installed versions of Node.js.
+- **Step6:**
+   To uninstall a specific version of Node.js, you can run the following command:
+
+    `nvm uninstall <node_version>`
+
+    Replace **<node_version>** with the version of Node.js you want to uninstall.
+
+     With these steps, you can manage multiple versions of Node.js and npm on Ubuntu using nvm.