各种命令操作

Linux：

[root@iZ94bojtvkpZ nodejs-6.2.2]# cd /data/nodejs-6.2.2/ [root@iZ94bojtvkpZ nodejs-6.2.2]# ./use_nodejs #进入nodejs命令行环境 bash-4.2#

Windows：进入C:websoft9nodejs-6.2.2目录，双击执行use_nodejs，进入nodejs命令行环境。

然后，就可以进行如下操作了：

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How to install modules？

In these cases, the command varies slightly:

$ npm -g install _PACKAGE_

For example, to install Express, you would execute:

$ npm -g install express

This will make the Express command-line available in all projects.

How to create a project using Express?

Installing it is as simple as starting the Bitnami console and then executing the command below:

$ npm -g install express
$ npm -g install express-generator

Create a skeleton project by executing these commands. This will produce a new application in the projects/sample-application directory:

$ cd _installdir_
$ mkdir -p projects
$ cd projects 
$ express sample-application

Then, install dependencies using npm:

$ cd sample-application
$ npm install 

This will download and install the required dependencies into a node_modules directory under your project folder.

How to start the Express web application ?

To start your application, you just have to start the Bitnami console and then execute the following command, inside your application directory:

$ node app.js

If you are using a recent Express version (greater than 4.0), you should use the following commands instead:

$ ./bin/www (Linux and Mac OS X native installers)
> node binwww (Windows native installer)

Port 3000 is the default port used by Express when creating the template. This means that you may receive an error similar to the below when starting the server:

Error: listen EADDRINUSE
    at errnoException (net.js:670:11)
    at Array.0 (net.js:771:26)
    at EventEmitter._tickCallback (node.js:190:38)

This means that the port is already in use. Edit the app.js script and change the line below:

...
app.listen(3000, function(){
...

Specify a different port number, as in the example below:

...
app.listen(4000, function(){
...

Then, start the application again.

How to list the installed modules?

To list the modules installed locally in a project, enter the project directory and execute the npm list command, as shown in the example below. Remember to start the Bitnami console first if using a native installer.

$ cd sample-application
$ npm list
application-name@0.0.1 /home/bitnami/projects/sample-application
├─┬ express@2.5.8 
│ ├─┬ connect@1.8.7 
│ │ └── formidable@1.0.9 
│ ├── mime@1.2.4 
│ ├── mkdirp@0.3.0 
│ └── qs@0.4.2 
└─┬ jade@0.26.1 
  ├── commander@0.5.2 
  └── mkdirp@0.3.0 

You can also list the globally installed packages by entering the project directory and executing the npm -g list command, as shown below:

$ cd sample-application
$ npm -g list
/opt/bitnami/nodejs/lib
├── coffee-script@1.3.3 
├── colors@0.6.0-1 
...
├─┬ express@2.5.9 
│ ├─┬ connect@1.8.7 
│ └── qs@0.4.2 
│ ├─┬ cliff@0.1.7 
...
│ │ ├── colors@0.6.0-1 
├─┬ jade@0.26.0 
│ ├── commander@0.5.2 
│ └── mkdirp@0.3.0 
├── node-dev@0.2.3 
├─┬ npm@1.1.21 
│ ├── abbrev@1.0.3 
│ ├─┬ node-gyp@0.4.1 
│ │ ├── ansi@0.0.4 
│ ├── uid-number@0.0.3 
│ └── which@1.0.5 
└── uglify-js@1.2.6 

How to upgrade NPM?

You can upgrade npm to the latest version with the following command:

$ npm -g install npm

Installing Node.js applications?

NOTE: To avoid a conflict between two or more Node.js applications attempting to use the same port, modify the application settings as needed to use a different port for each application.

To install a Node.js application, first ensure that all dependences are satisfied. Many applications will require Node.js and MongoDB, but others may require Redis or MySQL. To check available services, run this command:

_installdir_/ctlscript.sh status

To install an application in the _example/ _directory, first create the directory:

mkdir _installdir_/apps/example

Then, move the application files to that directory and follow the official installation steps.

Version 1.0.0