是什么原因导致错误:EACCES:权限被拒绝，访问'/usr/local/lib/node_modules'?
npm ERR! path /usr/local/lib/node_modules
npm ERR! code EACCES
npm ERR! errno -13
npm ERR! syscall access
npm ERR! Error: EACCES: permission denied, access '/usr/local/lib/node_modules'
npm ERR! { Error: EACCES: permission denied, access '/usr/local/lib/node_modules'
npm ERR! errno: -13,
npm ERR! code: 'EACCES',
npm ERR! syscall: 'access',
npm ERR! path: '/usr/local/lib/node_modules' }
npm ERR!
npm ERR! Please try running this command again as root/Administrator.
npm ERR! A complete log of this run can be found in:
npm ERR! /Users/macbookmd101/.npm/_logs/2018-02-21T16_26_08_421Z-debug.log
更改您的文件权限…像这样
首先检查谁拥有这个目录
ls -la /usr/local/lib/node_modules
它拒绝访问，因为node_module文件夹属于root用户
drwxr-xr-x 3 root wheel 102 Jun 24 23:24 node_modules
所以这需要通过将root改为你的用户来改变，但首先运行下面的命令来检查你的当前用户，我如何通过OS X中的命令行获得活动用户的名称?
id -un或者whoami
然后换主人
sudo chown -R [owner]:[owner] /usr/local/lib/node_modules
OR
sudo chown -R ownerName: /usr/local/lib/node_modules
OR
sudo chown -R $USER /usr/local/lib/node_modules
如果你正在运行Linux(如:Arch)
# npm -g install packageName
默认情况下，该命令将包安装在/usr/lib/node_modules/npm下，并且需要root权限才能这样做。
允许用户范围的安装
要允许为当前用户安装全局包，请设置npm_config_prefix环境变量。npm和yarn都使用这个。
mkdir ~/.node_modules
cat ~/.profile
PATH="$HOME/.node_modules/bin:$PATH"
export npm_config_prefix=~/.node_modules
重新登录或更新源代码以更新更改。
你也可以为npm install指定——prefix参数。但是，不建议这样做，因为每次安装全局包时都需要添加它。
$ npm -g install packageName --prefix ~/.node_modules
所以你不需要chown文件夹权限
注意所有更改/usr/local下所有目录所有者的响应
基本上，不要破坏Linux系统!!
对于本地的东西使用sudo也是一个非常糟糕的建议。
www.competa.com的原始链接被破坏了，所以这是原始的方法:
npm config set prefix ~/.npm
# open your .bashrc (Linux) or .bash_profile (Mac) file for editing:
nano ~/.bashrc # for Linux
# or...
nano ~/.bash_profile # for Mac if you haven't created a .bashrc file
# add these lines:
export PATH="$PATH:$HOME/npm/bin"
export NODE_PATH="$NODE_PATH:$HOME/npm/lib/node_modules"
# save the file and then enter this command or logout and login to make the changes take effect:
. ~/.bashrc
# or...
. ~/.bash_profile
选项B:使用NVM之类的版本管理器
对于linux / ubuntu如果命令
NPM install -g <package_name>
npm WARN deprecated superagent@4.1.0: Please note that v5.0.1+ of superagent removes User-Agent header by default, therefore you may need to add it yourself (e.g. GitHub blocks requests without a User-Agent header). This notice will go away with v5.0.2+ once it is released.
npm ERR! path ../lib/node_modules/<package_name>/bin/..
npm ERR! code EACCES
npm ERR! errno -13
npm ERR! syscall symlink
npm ERR! Error: EACCES: permission denied, symlink '../lib/node_modules
/<package_name>/bin/..' -> '/usr/local/bin/<package_name>'
npm ERR! { [Error: EACCES: permission denied, symlink '../lib/node_modules/<package_name>/bin/..' -> '/usr/local/bin/<package_name>']
npm ERR! cause:
npm ERR! { Error: EACCES: permission denied, symlink '../lib/node_modules/<package_name>/bin/..' -> '/usr/local/bin/<package_name>'
npm ERR! errno: -13,
npm ERR! code: 'EACCES',
npm ERR! syscall: 'symlink',
npm ERR! path: '../lib/node_modules/<package_name>/bin/..',
npm ERR! dest: '/usr/local/bin/ionic' },
npm ERR! stack:
npm ERR! 'Error: EACCES: permission denied, symlink \'../lib/node_modules/ionic/bin/ionic\' -> \'/usr/local/bin/ionic\'',
npm ERR! errno: -13,
npm ERR! code: 'EACCES',
npm ERR! syscall: 'symlink',
npm ERR! path: '../lib/node_modules/<package-name>/bin/<package-name>',
npm ERR! dest: '/usr/local/bin/<package-name>' }
npm ERR!
npm ERR! The operation was rejected by your operating system.
npm ERR! It is likely you do not have the permissions to access this file as the current user
npm ERR!
npm ERR! If you believe this might be a permissions issue, please double-check the
npm ERR! permissions of the file and its containing directories, or try running
npm ERR! the command again as root/Administrator (though this is not recommended).
npm ERR! A complete log of this run can be found in:
npm ERR! /home/User/.npm/_logs/2019-07-29T01_20_10_566Z-debug.log
修复:安装与根权限
Sudo NPM install <package_name> -g
