[CentOS] how to prevent files and directories from being deleted?

On Wednesday 04 October 2017 13:39:30 Mark Haney wrote:
> I'll end this by saying, I hope the production servers you have don't
> provide critical services that could jeopardize the lives of people. 
> I'd ask who you work for, to make sure I avoid them at all costs, but
> I'm not sure I'd be told.

The company I work for, and the livelihood of the hundreds of employees depend 
on my servers. In the 30 years I've been in the industry, I've never had 
problems as you've described