Two different version of install lib

Question

I'm checking with installed protobuf lib version on my system and I'm surprised with, following /usr/bin/protoc --version return V2.4.1 and following protoc --version return V3.0.0 .

Why this is so, am I missing any user account related installation concept.

Answer 1

It looks like you have two versions of protocol buffers installed.

If you write $ which protoc you will see where the protoc environment variable points to. Probably /usr/local/bin/protoc

You can change that to /usr/bin/protoc , but how depends on how it is set initially and what system you are on. Google or this article will help you with that.