CentOS 7 Command autocomplete.

In CentOS 7 minimal autocomplete packages are not installed by default:
yum install epel-release.noarch -y
yum install bash-completion bash-completion-extras -y
source /etc/profile.d/bash_completion.sh

Usage:
command [TAB][TAB]
command --[TAB][TAB]
man rsyn[TAB]
rpm -qi pacemak[TAB]