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20190315 使用 nvm 安裝 nodejs

1、 找到 nvm 官網幫助

https://github.com/creationix/nvm

我習慣於 terminal 操作，所以選擇 git install ，幫助文件如下 https://github.com/creationix/nvm#git-install

2、下載 nvm、install

mkdir nvm
cd nvm/
wget -qO- https://raw.githubusercontent.com/creationix/nvm/v0.34.0/install.sh | bash
提示內容：
	=> Downloading nvm as script to '/home/dhbm/.nvm'
	
	=> Appending nvm source string to /home/dhbm/.bashrc
	=> Appending bash_completion source string to /home/dhbm/.bashrc
	=> Close and reopen your terminal to start using nvm or run the following to use it now:
	
	export NVM_DIR="$HOME/.nvm"
	[ -s "$NVM_DIR/nvm.sh" ] && \. "$NVM_DIR/nvm.sh"  # This loads nvm
	[ -s "$NVM_DIR/bash_completion" ] && \. "$NVM_DIR/bash_completion"  # This loads nvm bash_completion
 

3、設定環境

按照提示，直接 copy 貼上以上內容
export NVM_DIR="$HOME/.nvm"
		[ -s "$NVM_DIR/nvm.sh" ] && \. "$NVM_DIR/nvm.sh"  # This loads nvm
		[ -s "$NVM_DIR/bash_completion" ] && \. "$NVM_DIR/bash_completion"  # This loads nvm bash_completion

確認 nvm
command -v nvm
返回結果：
	nvm
 

4、安裝 nodejs

nvm install node
返回內容如下：
	Downloading and installing node v11.11.0..
	...

確認 nodejs 和 npm 版本	
	node --version
	返回結果：
		v11.11.0
	 npm -v
		6.7.0

5、設定 淘寶映象代理

	獲取當前 npm 代理
	npm get registry
	返回結果：
		https://registry.npmjs.org/

	設定淘寶映象代理
	npm config set registry http://registry.npm.taobao.org/

	恢復 npm 代理
	npm config set registry https://registry.npmjs.org/	

6、安裝 cnpm

npm install cnpm -g

檢視版本號
	cnpm -v
	返回結果：
		[email protected] (/home/dhbm/.nvm/versions/node/v11.11.0/lib/node_modules/cnpm/lib/parse_argv.js)
		[email protected] (/home/dhbm/.nvm/versions/node/v11.11.0/lib/node_modules/cnpm/node_modules/npm/lib/npm.js)
		[email protected] (/home/dhbm/.nvm/versions/node/v11.11.0/bin/node)
		[email protected] (/home/dhbm/.nvm/versions/node/v11.11.0/lib/node_modules/cnpm/node_modules/npminstall/lib/index.js)
		prefix=/home/dhbm/.nvm/versions/node/v11.11.0 
		linux x64 4.15.0-46-generic 
		registry=https://registry.npm.taobao.org

7、安裝 yarn

經常有 npm 找不到的包， npm淘寶映象和 cnpm 也不管用
所以，也安裝一個 yarn 備用
npm install -g yarn

檢視版本號
yarn -v
	1.13.0

同樣設定一下 yarn 淘寶映象代理
yarn config set registry http://registry.npm.taobao.org/
yarn config set registry https://registry.npm.taobao.org -g 
yarn config set sass_binary_site http://cdn.npm.taobao.org/dist/no