I'm still trying to get an idea about how best to handle patches on CentOS. Say I want to apply security patches automatically on a nightly basis. But when the push from 4.2 to 4.3 comes around, I want to defer that for when I can do it manually. Is that possible? (Preferably with yum, but I would use up2date if that were necessary.) Also, I'm used to doing 'yum update'. I understand that 'yum upgrade' enables the obsoletion logic in yum, but practically speaking, when is it appropriate to use one or the other? Thanks, Steve