2.2 安装
最后更新于：2022-04-01 23:32:40
# install
3m安装法
* nvm
* npm
* nrm
## 安装nvm
~~~
curl -o- https://raw.githubusercontent.com/creationix/nvm/v0.29.0/install.sh | bash
~~~
cat ~/.bashrc
~~~
export NVM_DIR="/home/coding/.nvm"
[ -s "$NVM_DIR/nvm.sh" ] && . "$NVM_DIR/nvm.sh" # This loads nvm
~~~
但coding默认使用的zsh，所以需要把环境变量放到
~~~
vi ~/.zshrc
~~~
追加
~~~
export NVM_DIR="/home/coding/.nvm"
[ -s "$NVM_DIR/nvm.sh" ] && . "$NVM_DIR/nvm.sh" # This loads nvm
~~~
然后，source使环境变量生效
~~~
source ~/.zshrc
~~~
## 安装nodejs
4.2是LTS是长期支持版本，无论是开发还是产品模式都推荐安装4.2版本。
~~~
nvm install 4.2
~~~
默认使用4.2版本进行编译，操作如下：
~~~
➜ workspace git:(i5ting) nvm alias default 4.2
default -> 4.2 (-> v4.2.2)
~~~
此时，你输入`node -v`
~~~
➜ workspace git:(i5ting) node -v
v4.2.2
~~~
如果想安装其他版本，请参照上面步骤
## 安装或更新npm
~~~
➜ nodejs-practice git:(master) ✗ node -v
v4.0.0
➜ nodejs-practice git:(master) ✗ npm -v
2.14.2
➜ nodejs-practice git:(master) ✗ npm install -g npm@2.9
~~~
说明npm 3.x和2.x差别非常大，3.x目前还不够稳定，建议用2.x
## 安装nrm(npm registry manager)
[https://github.com/Pana/nrm](https://github.com/Pana/nrm)
nrm can help you easy and fast switch between different npm registries, now include: npm, cnpm, eu, au, sl(strongloop), nj(nodejitsu), pt(Portuguese).
Recently npm has some problem frequently, nrm will be helpful to all noders.
registry是指从哪个源下载nodejs模块
~~~
$ npm install -g nrm
~~~
* nrm test
* nrm ls
* nrm use
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