npm throws error without sudo

Question

I just installed node and npm through the package on nodejs.org and whenever I try to search or install something with npm it throws the following error, unless I sudo the c

Answer 1

For me, execute only

sudo chown -R $(whoami) ~/.npm

doesn't work. Then, I execute too

sudo chown -R $(whoami) /usr/lib/node_modules/
sudo chown -R $(whoami) /usr/bin/node
sudo chown -R $(whoami) /usr/bin/npm

And all works fine!