在 Ubuntu 16.04 上安裝 web3

我正在嘗試在 ubuntu 16.04 vm 上安裝 web3，但出現以下錯誤。

npm WARN deprecated fs-promise@2.0.3: Use mz or fs-extra^3.0 with Promise Support
npm WARN deprecated tar.gz@1.0.7: ⚠️  WARNING ⚠️ tar.gz module has been deprecated and your application is vulnerable. Please use tar module instead: https://npmjs.com/tar

> scrypt@6.0.3 preinstall /home/ltu/web3/node_modules/scrypt
> node node-scrypt-preinstall.js


> scrypt@6.0.3 install /home/ltu/web3/node_modules/scrypt
> node-gyp rebuild

gyp ERR! configure error 
gyp ERR! stack Error: EACCES: permission denied, mkdir '/home/ltu/web3/node_modules/scrypt/build'
gyp ERR! System Linux 4.13.0-38-generic
gyp ERR! command "/usr/local/bin/node" "/usr/local/lib/node_modules/npm/node_modules/node-gyp/bin/node-gyp.js" "rebuild"
gyp ERR! cwd /home/ltu/web3/node_modules/scrypt
gyp ERR! node -v v9.10.1
gyp ERR! node-gyp -v v3.6.2
gyp ERR! not ok 
npm WARN enoent ENOENT: no such file or directory, open '/home/ltu/web3/package.json'
npm WARN web3 No description
npm WARN web3 No repository field.
npm WARN web3 No README data
npm WARN web3 No license field.

npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! scrypt@6.0.3 install: `node-gyp rebuild`
npm ERR! Exit status 1
npm ERR! 
npm ERR! Failed at the scrypt@6.0.3 install script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR!     /home/ltu/.npm/_logs/2018-04-20T10_50_03_804Z-debug.log

請幫忙！！！

你的權限node_modules是root。當您使用sudo或以 root 身份全域安裝某些軟體包時，會發生這種情況。為了能夠立即安裝，您需要執行安裝命令sudo

sudo npm install web3 -g

如果使用 sudo 安裝包，下次安裝包時會出現“EACCES：權限被拒絕”錯誤，因為通過 sudo 安裝的包的所有者是 root，而不是你。

通過 yarn 安裝 web3.js：

$ 紗線添加 web3 –dev

引用自：https://ethereum.stackexchange.com/questions/46298