$ npm install socket.io npm ERR! tar "-mvxpf" "-" "-o" "-C" "/tmp/npm-1315624604792/1315624604792-0.731322419596836/contents/___package.npm" tar: Ignoring unknown extended header keyword `LIBARCHIVE.creationtime' npm ERR! tar "-mvxpf" "-" "-o" "-C" "/tmp/npm-1315624604792/1315624604792-0.731322419596836/contents/___package.npm" tar: Ignoring unknown extended header keyword `SCHILY.dev' npm ERR! ta