I am trying to following instructions on homebrew homepage but the following
ruby -e \"$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/ins
You are most probably behind a proxy. Consider running curl command with -k parameter:
-k, --insecure (SSL) This option explicitly allows curl to perform "insecure" SSL connections and transfers. All SSL connections are attempted to be made secure by using the CA certificate bundle installed by default. This makes all connections considered "insecure" fail unless -k, --insecure is used.
See this online resource for further details: http://curl.haxx.se/docs/sslcerts.html
Check also Homebrew docs where they talk about this.