Do you have trouble installing modules from NPM without using sudo? Are you able to update some modules without using sudo, and others still require it?
I strongly encourage you not to do package management with sudo! Packages can run arbitrary scripts, which makes sudoing a package manager command as safe as a chainsaw haircut. Sure, it's fast and definitely going to cut through any obstacles, but you might actually want that obstacle to stay there.
Introduction to NPM -- Isaac Z. Schlueter
There are couple common problems with npm_modules directory. This tool tries to adress a few of them.
- Sets your
node_modulesdirectory to 755,drwxr-xr-x. - Sets the correct user:group ownership permissions on the files within your
node_modulesdirectory.
sudo npm install -g npmdoctor
Then, and yes, you need sudo to correctly fix the permissions.
sudo npmdoctor -u {YOURUSERNAME}
Make sure to replace {YOURUSERNAME} with your actual user name. If you're unsure, you can find this out with whoami.