Install error on Ubuntu 16.04

[ostriandoni]

What I type?

$ sudo npm install -g swagger-spec-to-pdf

What I get?

> swagger-spec-to-pdf@1.0.8 preinstall /usr/local/lib/node_modules/swagger-spec-to-pdf
> npm i -g http-server

npm ERR! path /usr/local/bin/http-server
npm ERR! code EACCES
npm ERR! errno -13
npm ERR! syscall unlink
npm ERR! Error: EACCES: permission denied, unlink '/usr/local/bin/http-server'
npm ERR!  { Error: EACCES: permission denied, unlink '/usr/local/bin/http-server'
npm ERR!   cause: 
npm ERR!    { Error: EACCES: permission denied, unlink '/usr/local/bin/http-server'
npm ERR!      errno: -13,
npm ERR!      code: 'EACCES',
npm ERR!      syscall: 'unlink',
npm ERR!      path: '/usr/local/bin/http-server' },
npm ERR!   stack: 'Error: EACCES: permission denied, unlink \'/usr/local/bin/http-server\'',
npm ERR!   errno: -13,
npm ERR!   code: 'EACCES',
npm ERR!   syscall: 'unlink',
npm ERR!   path: '/usr/local/bin/http-server' }
npm ERR! 
npm ERR! Please try running this command again as root/Administrator.

Try it without global flag and sudo

$ npm install swagger-spec-to-pdf

get same error message as above

Try manual install http-server as mentioned as error message above

$ npm i -g http-server

http-server is installed, then run again

$ npm install swagger-spec-to-pdf

still get same error message as above

What should I do to getting this done?
Please advise.

[agreatfool]

Hi, sorry for the late reply. Seems this is a rare case. Could you please provide the node version & npm version you using?

For now, just two fix:

1. check the tips npm official: How to Prevent Permissions Errors
2. try to use yarn to install the package