[CentOS] debugging RAM issues

[Alan McKay]

Well I did exactly what I'd done 3 months ago and found a faulty RAM chip
this time

My guess is that back then the chip was still functioning some of the time,
and happened to be fine just when I was doing the tests.

This time I found it fairly easily with a systematic approach.

-- 
“Don't eat anything you've ever seen advertised on TV”
         - Michael Pollan, author of "In Defense of Food"