mac os

sudo chmod 777 /usr/local/bin
sudo chmod 777 /usr/local/share/man/man1
brew link pkg-config

--to restore the original permissions.

sudo chmod 755 /usr/local/bin
sudo chmod 755 /usr/local/share/man/man1

terminal proxy

   export http_proxy=http://172.31.100.33:8087

 

  --brew

ruby -e "$(curl -fsSL -k https://raw.github.com/mxcl/homebrew/go)"