node.js - npm throws error without sudo -

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i installed node , npm through package on nodejs.org , whenever try search or install npm throws following error, unless sudo command. have feeling permissions issue? admin.

npm err! error: eacces, open '/users/chietala/.npm/-/all/.cache.json' npm err!  { [error: eacces, open '/users/chietala/.npm/-/all/.cache.json'] npm err!   errno: 3, npm err!   code: 'eacces', npm err!   path: '/users/chietala/.npm/-/all/.cache.json' } npm err!  npm err! please try running command again root/administrator.  npm err! system darwin 12.2.0 npm err! command "node" "/usr/local/bin/npm" "search" "bower" npm err! cwd /users/chietala npm err! node -v v0.10.4 npm err! npm -v 1.2.18 npm err! path /users/chietala/.npm/-/all/.cache.json npm err! code eacces npm err! errno 3 npm err! stack error: eacces, open '/users/chietala/.npm/-/all/.cache.json' npm err!  npm err! additional logging details can found in: npm err!     /users/chietala/npm-debug.log npm err! not ok code 0

this looks permissions issue in home directory. reclaim ownership of .npm directory execute:

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

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