Bundler installation dos't respond

My disto is Centos 7. I install ruby with :

yum install ruby.

So i have :

[root@localhost ~]# ruby -v
ruby 2.0.0p648 (2015-12-16) [x86_64-linux]

and :

[root@localhost ~]# gem -v
2.0.14.1

Now when i use bundle install command it return :

-bash: bundle: command not found

I try to install bundler with :

gem install bundler

It wait and wait and do not respond any thing.

My goal is running bundle install command without error.

What should i do?