nvm使用 nvm 管理不同版本的 node 与 npm

2018-08-13

卸载老版本的 node 和 nvm

如果是从 brew 安装的, 运行 brew uninstall node
删除~/目录下所有 node 和 node_modules
删除 /usr/local/lib 中的所有 node 和 node_modules
删除 /usr/local/lib 中的所有 node 和 node_modules 的文件夹
在 /usr/local/bin 中, 删除所有 node 的可执行文件(node 和 npm)

手动删除文件，整理成脚本是这个样子

sudo rm -rf ~/.npm
sudo rm -rf ~/node_modules
sudo rm -rf ~/.node-gyp
sudo rm /usr/local/bin/node
sudo rm /usr/local/bin/npm
sudo rm /usr/local/lib/dtrace/node.d

卸载 NVM

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rm -rf ~/.nvm
rm -rf ~/.npm
rm -rf ~/.bower

还需要删除下.bash_profile文件中的配置(用brew安装后还需要重新加上，但不太一样)

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# vim .bash_profile
export NVM_DIR="$HOME/.nvm"
[ -s "$NVM_DIR/nvm.sh" ] && . "$NVM_DIR/nvm.sh" # This loads nvm

安装nvm

1	curl -o- https://raw.githubusercontent.com/creationix/nvm/v0.33.11/install.sh\|bash

在.bash_profile文件最后边添加，没有这个文件就创建一个

1 2	export NVM_DIR="$HOME/.nvm" [ -s "$NVM_DIR/nvm.sh" ] && . "$NVM_DIR/nvm.sh"

重新启动一下配置
输入nvm可以看到如下信息

Node Version Manager

Note: <version> refers to any version-like string nvm understands. This includes:
  - full or partial version numbers, starting with an optional "v" (0.10, v0.1.2, v1)
  - default (built-in) aliases: node, stable, unstable, iojs, system
  - custom aliases you define with `nvm alias foo`

Usage:
  nvm help                                  Show this message
  nvm --version                             Print out the latest released version of nvm
  nvm install [-s] <version>                Download and install a <version>, [-s] from source. Uses .nvmrc if available
    --reinstall-packages-from=<version>     When installing, reinstall packages installed in <node|iojs|node version number>
  nvm uninstall <version>                   Uninstall a version
  nvm use [--silent] <version>              Modify PATH to use <version>. Uses .nvmrc if available
  nvm exec [--silent] <version> [<command>] Run <command> on <version>. Uses .nvmrc if available
  nvm run [--silent] <version> [<args>]     Run `node` on <version> with <args> as arguments. Uses .nvmrc if available
  nvm current                               Display currently activated version
  nvm ls                                    List installed versions
  nvm ls <version>                          List versions matching a given description
  nvm ls-remote                             List remote versions available for install
  nvm version <version>                     Resolve the given description to a single local version
  nvm version-remote <version>              Resolve the given description to a single remote version
  nvm deactivate                            Undo effects of `nvm` on current shell
  nvm alias [<pattern>]                     Show all aliases beginning with <pattern>
  nvm alias <name> <version>                Set an alias named <name> pointing to <version>
  nvm unalias <name>                        Deletes the alias named <name>
  nvm reinstall-packages <version>          Reinstall global `npm` packages contained in <version> to current version
  nvm unload                                Unload `nvm` from shell
  nvm which [<version>]                     Display path to installed node version. Uses .nvmrc if available

Example:
  nvm install v0.10.32                  Install a specific version number
  nvm use 0.10                          Use the latest available 0.10.x release
  nvm run 0.10.32 app.js                Run app.js using node v0.10.32
  nvm exec 0.10.32 node app.js          Run `node app.js` with the PATH pointing to node v0.10.32
  nvm alias default 0.10.32             Set default node version on a shell

Note:
  to remove, delete, or uninstall nvm - just remove the `$NVM_DIR` folder (usually `~/.nvm`)

安装Node

查看Node所有版本，用nvm ls-remote命令，如下：(注意ls-remote 连在一起)

v0.1.14
v0.1.15
v0.1.16
...
 v7.7.1
 v7.7.2
 v7.7.3

正常安装的话 nvm install v6.10.0会很慢，推荐使用国内镜像：(在.bash_profile文件中添加下边镜像源)

1	export NVM_NODEJS_ORG_MIRROR=https://npm.taobao.org/mirrors/node

需要哪个版本，就在最后将6换成对应的版本号就行，默认下载版本中最新的版本号。

安装node

1	nvm install node (安装是最新的版本)

使用nvm轻松切换node版本

1	nvm use v4.1.0 //nvm use node 默认使用最新的

有时候使用nvm use node 不能正常使用，用下面命令处理

1	nvm use --delete-prefix v6.14.3 --silent

参考地址

安装完后出现 nvm: command not found

执行以下代码

1	$ source ~/.nvm/nvm.sh

安装完成后运行RN项目的时候出现 react-native: command not found 错误，执行以下代码

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npm install -g react-native-cli
//卸载
npm uninstall -g react-native-cli

RN项目跑起来,出现No bundle URL present 需要开启npm

1 2	react-native link npm run start

nvm默认启动一种环境

1	nvm alias default 6.9.4

创建react应用

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npx create-react-app my-app
cd my-app
npm start

nvm卸载指定node.js版本号

1	nvm卸载指定node.js版本号

报这个错,说明权限不够，需要在命令前添加sudo
__

file is not writable: $NVM_DIR/versions/node/v6.9.2/bin/gulp
Cannot uninstall, incorrect permissions on installation folder.
This is usually caused by running `npm install -g` as root. Run the following commands as root to fix the permissions and then try again.

 chown -R xgllseo "$NVM_DIR/versions/node/v6.9.2"
 chmod -R u+w "$NVM_DIR/versions/node/v6.9.2"

mac 下nvm安装的node的位置

1	user/.nvm/versions/对应node的版本/lib/node_modules/全局安装的node库