npm command – sudo or not?

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It’s possible (and advisable) to npm install -g node modules without sudo.

Check the permission of your /usr/local/share/npm/bin folder. I had installed node and npm through brew (without sudo) and that particular folder ended up being owned by root.

This fixed it for once and for all:

$ sudo chown $(whoami) /usr/local/share/npm/bin

(As for disallowing sudo with npm: you’d have to tweak npm for that. Your own node code could make use of https://npmjs.org/package/sudo-block, npm install sudo-block)

EDIT: even though this works, I no longer use -g. Instead use prefix (see next answer), or better yet use NIX https://unix.stackexchange.com/a/381797 (even on OSX)

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