Just set up nodejs on my Ubuntu 14.04 system. Upon running node --version, I see that it's v4.4.2. Also, npm is installed with version 3.9.2. When I execute the command npm install -g express, this is the output I get: install express js
Once the installation process is complete and I check the express version, the message displayed says The program 'express' is not installed. Please try apt-get install node-express. Can someone point out where I might be going wrong?
To begin, open your terminal using 'ctrl + alt + t'
- Check if nodejs is installed by running the command: node -v
- Navigate to the path in the terminal: cd /var/www/html
- Create a new folder either manually or via command line: mkdir nodeTest
- Enter the 'nodeTest' folder: cd nodeTest
- Initialize a new Node project with 'package.json': npm init
- Install Express: sudo npm install express --save
Now access the 'nodeTest' folder at: /var/www/html/nodeTest
Create a new file: index.js
index.js
var express = required("express");
var app = express();
app.get("/", function (req, res) {
res.send(" Welcome Node js ");
});
app.listen(8000, function () {
console.log("Node server is running on port 8000...");
});
To start the node server, use the terminal command: node index.js
Then check the url: "localhost:8000"
As mentioned in my previous comment, ExpressJS is a framework designed for building servers rather than being a server itself.
To start using ExpressJS, first create an npm project by running npm init, then install it as a dependency with npm install express --save. Next, take a look at the "Hello World" example to learn how to set up a basic server: Hello World Starter
var express = require('express');
var app = express();
app.get('/', function (req, res) {
res.send('Hello World!');
});
app.listen(3000, function () {
console.log('Example app listening on port 3000!');
});
If you need to serve static files, you can do so by adding the following code:
app.use(express.static('name_of_the_directory'));
The tutorial you're currently using may not be up to date.
In the past, Express used to come with a command line tool called express, which allowed users to create application skeletons. However, this tool was removed from the main express package after the release of Express 4. It has now been moved to a separate package known as express-generator.
To install this package, you can use the following command:
$ npm install express-generator -g
Once installed, you should have access to the express command line tool. Keep in mind that due to the outdated nature of the tutorial, you may encounter additional issues along the way.
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