Linux content sites

I need to verify and/or setup receiving bigfix patches for CentOS 5, 6 and 7 servers in my environment. Can you guide me towards performing this task.

Please see the post-installation steps documented here starting at step 4:

https://www.ibm.com/support/knowledgecenter/en/SSQL82_9.5.0/com.ibm.bigfix.doc/Platform/Installation/post_installation_steps.html#rccusrStartCollabBkr

In short, you can use the License Overview dashboard to enable content sites of interest, then configure them by subscribing clients, and defining operator permissions.