在mac安装npm报错 ，因为我之前装过npm后来我卸掉了，在重装就不行了。
yikuair-MacBook-Pro:~ yikuair$ curl http://npmjs.org/install.sh | sh
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 85 0 85 0 0 17 0 --:–:-- 0:00:04 --:–:-- 275
sh: line 1: syntax error near unexpected token newline' sh: line 1:<html>Moved: <a href=“https://npmjs.org/install.sh”>https://npmjs.org/install.sh</a>’
