ubuntu下nodejs报错：let notifier = require('update-notifier')({pkg})

错误：

/usr/local/lib/node_modules/npm/bin/npm-cli.js:85
      let notifier = require('update-notifier')({pkg})
      ^^^

SyntaxError: Block-scoped declarations (let, const, function, class) not yet supported outside strict mode
    at exports.runInThisContext (vm.js:53:16)
    at Module._compile (module.js:374:25)
    at Object.Module._extensions..js (module.js:417:10)
    at Module.load (module.js:344:32)
    at Function.Module._load (module.js:301:12)
    at Function.Module.runMain (module.js:442:10)
    at startup (node.js:136:18)
    at node.js:966:3

解决办法：

1.移除错误的node_modules

cd /usr/local/lib/
rm node_modules/ -rf

2.卸载nodejs：

sudo apt-get autoremove nodejs

3.更新源，准备重新安装：

sudo apt-get update
sudo apt-get install -y python-software-properties software-properties-common
sudo add-apt-repository ppa:chris-lea/node.j
sudo apt-get update

4.安装nodejs：

sudo apt-get install nodejs
sudo apt install nodejs-legacy
sudo apt install npm

5.更新npm的包镜像源，方便快速下载

sudo npm config set registry https://registry.npm.taobao.org
sudo npm config list

6.全局安装n管理器(用于管理nodejs版本)

sudo npm install n -g

7.安装最新的nodejs（stable版本）

sudo n stable
sudo node -v