[CentOS] Proxy server settings

Hello All,

I'm sure this must be a fairly quick and easy configuration, but I have 
not been able to figure it out yet.

How do you configure the proxy settings in the OS itself (not in a 
browser or other application) so that anytime the server tries to get 
out to the internet, that it can direct its traffic to go through a 
proxy server?

I tried putting the proxy settings in .bash_profile per a tech article I 
found online but that did not work.

The OS is Redhat 7.2.

Thanks,

Paul Greene