写在前面

因为工作需要，需要使用到nodejs，所以这里简单记录下学习过程。

1：安装

wget https://nodejs.org/dist/v14.17.4/node-v14.17.4-linux-x64.tar.xz
tar xf node-v14.17.4-linux-x64.tar.xz
mkdir /usr/local/lib/node // 这一步骤根据具体的改就行，后面记得改成你本地的
mv node-v14.17.4-linux-x64 /usr/local/lib/node/nodejs

sudo vim /etc/profile
export NODEJS_HOME=/usr/local/lib/node/nodejs
export PATH=$NODEJS_HOME/bin:$PATH

source /etc/profile
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最后查看：

[root@localhost bin]# node -v
v14.17.4
[root@localhost bin]# npm -v
6.14.14
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设置淘宝源，加速包下载：

npm config set registry https://registry.npm.taobao.org/
npm install -g cnpm --registry=https://registry.npm.taobao.org
npm config get registry // 查看源
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2：测试项目

[root@localhost firstNodeJs]# npm init
This utility will walk you through creating a package.json file.
It only covers the most common items, and tries to guess sensible defaults.

See `npm help init` for definitive documentation on these fields
and exactly what they do.

Use `npm install ` afterwards to install a package and
save it as a dependency in the package.json file.

Press ^C at any time to quit.
package name: (firstnodejs) 
version: (1.0.0) 
description: 
entry point: (index.js) 
test command: 
git repository: 
keywords: 
author: 
license: (ISC) 
About to write to /root/nodejs/firstNodeJs/package.json:

{
  "name": "firstnodejs",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "author": "",
  "license": "ISC"
}


Is this OK? (yes) yes
[root@localhost firstNodeJs]# ls
package.json
[root@localhost firstNodeJs]# ls
package.json
[root@localhost firstNodeJs]# vim hello.js
[root@localhost firstNodeJs]# cat hello.js 
console.log('hello from node');
[root@localhost firstNodeJs]# node hello.js 
hello from node
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测试一个http的：

[root@localhost firstNodeJs]# vim myhttp.js
[root@localhost firstNodeJs]# node myhttp.js 
server is running...

[root@localhost firstNodeJs]# cat myhttp.js 
const http=require('http');
const server=http.createServer();

server.on('request',function(request,response) {
	response.end("
hellooooooooo!!!
");		
})
server.listen(3001,function() {
	console.info('server is running...');
})
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3：用idea调试

4：遇到的坑

4.1：npm 卡在 sill idealTree buildDeps

向下参考npm sill idealTree buildDeps 安装踩坑指南（详细版） 。