1、NVM 简介

NVM（node version manager）是一个可以让你在同一台机器上安装和切换不同版本 node 的工具。
GitHub 地址

2、NVM 环境配置

2.1 安装 NVM

如果系统没有安装 git 的话，需先安装 git。

在终端输入以下命令安装 NVM。

# 安装 NVM

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

安装完成后在终端中输入以下命令配置环境变量。
```
# 打开环境变量配置文件

$ vim ~/.bash_profile
```
在 .bash_profile 文件中添加一下字段。
```
source ~/.bashrc
```
保存文件退出，在终端中输入以下命令使配置生效。
```
# 使环境变量配置生效

$ source ~/.bash_profile
```

2.2 NVM 常用命令

常用命令

# 查看该系统已经安装的版本，这个命令也能看到当前使用的是哪个版本

$ nvm ls

# 列出全部可以安装的版本号

$ nvm ls-remote

# 安装指定版本

$ nvm install [version]

$ nvm install v10.2.0

# 切换到指定版本，切换效果是全局的

$ nvm use [version]

$ nvm use v10.2.0

# 查看当前使用的版本

$ nvm current

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`

 Any options that produce colorized output should respect the `--no-colors` option.

Usage:

  nvm --help                                Show this message

  nvm --version                             Print out the installed 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>

    --lts                                   When installing, only select from LTS (long-term support) versions

    --lts=<LTS name>                        When installing, only select from versions for a specific LTS line

    --skip-default-packages                 When installing, skip the default-packages file if it exists

    --latest-npm                            After installing, attempt to upgrade to the latest working npm on the given node version

  nvm uninstall <version>                   Uninstall a version

  nvm uninstall --lts                       Uninstall using automatic LTS (long-term support) alias `lts/*`, if available.

  nvm uninstall --lts=<LTS name>            Uninstall using automatic alias for provided LTS line, if available.

  nvm use [--silent] <version>              Modify PATH to use <version>. Uses .nvmrc if available

    --lts                                   Uses automatic LTS (long-term support) alias `lts/*`, if available.

    --lts=<LTS name>                        Uses automatic alias for provided LTS line, if available.

  nvm exec [--silent] <version> [<command>] Run <command> on <version>. Uses .nvmrc if available

    --lts                                   Uses automatic LTS (long-term support) alias `lts/*`, if available.

    --lts=<LTS name>                        Uses automatic alias for provided LTS line, if available.

  nvm run [--silent] <version> [<args>]     Run `node` on <version> with <args> as arguments. Uses .nvmrc if available

    --lts                                   Uses automatic LTS (long-term support) alias `lts/*`, if available.

    --lts=<LTS name>                        Uses automatic alias for provided LTS line, if available.

  nvm current                               Display currently activated version

  nvm ls                                    List installed versions

  nvm ls <version>                          List versions matching a given <version>

  nvm ls-remote                             List remote versions available for install

    --lts                                   When listing, only show LTS (long-term support) versions

  nvm ls-remote <version>                   List remote versions available for install, matching a given <version>

    --lts                                   When listing, only show LTS (long-term support) versions

    --lts=<LTS name>                        When listing, only show versions for a specific LTS line

  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

    --lts                                   When listing, only select from LTS (long-term support) versions

    --lts=<LTS name>                        When listing, only select from versions for a specific LTS line

  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 install-latest-npm                    Attempt to upgrade to the latest working `npm` on the current node version

  nvm reinstall-packages <version>          Reinstall global `npm` packages contained in <version> to current version

  nvm unload                                Unload `nvm` from shell

  nvm which [current | <version>]           Display path to installed node version. Uses .nvmrc if available

  nvm cache dir                             Display path to the cache directory for nvm

  nvm cache clear                           Empty cache directory for nvm

Example:

  nvm install 8.0.0                     Install a specific version number

  nvm use 8.0                           Use the latest available 8.0.x release

  nvm run 6.10.3 app.js                 Run app.js using node 6.10.3

  nvm exec 4.8.3 node app.js            Run `node app.js` with the PATH pointing to node 4.8.3

  nvm alias default 8.1.0               Set default node version on a shell

  nvm alias default node                Always default to the latest available node version on a shell

Note:

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

巴特西

Mac NVM 配置

1、NVM 简介

2、NVM 环境配置

2.1 安装 NVM

2.2 NVM 常用命令

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