'protoc --version' did not return a version

I came across this error while I was triying to Build Hadoop.

Check if the ProtocolBuffers already installed?
protoc --version

Install ProtocolBuffers
sudo apt-get install protobuf-compiler  

Check the version
protoc --version

if the version does not display try following command.
sudo ldconfig
protoc --version


The above steps should fix the issue. But while i was trying to figure out the issue I installed the following as well. 

apt-get -y install autoconf automake libtool cmake zlib1g-dev pkg-config libssl-dev

I got the above command from HowToContribute but i changed it.

apt-get -y install maven build-essential autoconf automake libtool cmake zlib1g-dev pkg-config libssl-dev

I removed the  "maven build-essential" from the command. since this will configure the Ubuntu with Open JDK and other tools which is not required.


Further Details can found in the following URI.
Trunk doesn't compile