mac下 brew 安装nvm

1、执行brew doctor查看状态，如果未显示Your system is ready to brew.说明有为清理干净的node和npm文件，清理掉所有相关文件，可执行如下命令清理：

sudo rm -rf /usr/local/{lib/node{,/.npm,_modules},bin,share/man}/{npm*,node*,man1/node*}

brew doctor

Your system is ready to brew.

2、将brew更新到最新版本

brew update

3、安装nvm

brew install nvm

4、配置终端启动时自动执行 source ~/.nvm/nvm.sh,
在 ~/.bash_profile文件添加以下命令:

export NVM_NODEJS_ORG_MIRROR=https://npm.taobao.org/mirrors/node
export NVM_DIR="$HOME/.nvm"
source $(brew --prefix nvm)/nvm.sh

重新打开你的终端或执行source ~/.nvm/nvm.sh, 输入 nvm

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`

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

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>
--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
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 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
nvm cache dir                             Display path to the cache directory for nvm
nvm cache clear                           Empty cache directory for nvm

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`)

备注：第四部如若设置不当，安装node后会出现以下错误，

nvm is not compatible with the npm config "prefix" option:
currently set to "/Users/z/.npm-global"
Run `npm config delete prefix` or `nvm use --delete-prefix v4.2.4` to unset it.