The ESX console and the VI Client (newly re-branded as vSphere) the two ways to get in to an ESX server. When you have ‘multiple cooks’, it becomes a requirement to be able to track who has done what on the system, and this is where ESX can be tweaked to provide granular authentication. span
Linux has made great strides in recent years. One of the main pains was when the root volume needs to be extended because so many steps are needed in order to make it work properly and the system is off-line during the entire time. Not any longer. With ext3, it is not only possible to