npm path needs fix

Make a directory for global installations:

mkdir ~/.npm-global
Configure npm to use the new directory path:

npm config set prefix '~/.npm-global'
Open or create a ~/.profile file and add this line:

export PATH=~/.npm-global/bin:$PATH
Back on the command line, update your system variables:

source ~/.profile
Test: Download a package globally without using sudo.

npm install -g jshint

Instead of steps 2-4 you can also use the corresponding ENV variable (e.g. if you don't want to modify ~/.profile):

NPM_CONFIG_PREFIX=~/.npm-global npm install -g jshint

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