On 10/11/2017 10:23 AM, Willie Barnett wrote:
The recommended way of putting the same install on lots of machines for
CentOS is to PXE boot (net-boot with the Preboot eXecution Environment)
the box and run a kickstart install from the PXE-booted image from the
installation server. But as Sherrod said, that's when you're installing
30-50 or more machines that it makes good sense to do that, as it is
overkill for less than 25 machines; might be overkill for less than 50,
but it just depends on what those machines do and how often you install
(or if you just want to learn a really cool new skill like setting up a
PXE install server and doing kickstart installs, which can be completely
unattended and done on machines with no keyboard/monitor or other
console (aka, 'headless')).
Since 3 of these test bed machines are pretty much identical, can the
INSTALL be done on ONE, then the HD simply CLONED for the others?
(Then set unique network names, IP addresses, etc, individually.)
There must be a GOOD/EASY HD clone utility for Linux... but where?
Which one? :)
Cloning, whether Linux or Windows, has the side-effect of making UUID's
(Universally Unique IDentifiers) no longer Unique. This can have bad
side-effects, especially if you move the hard drive back around and try
to pull data off of the drive; two drives should not have
partitions/physical volumes/volume groups with the same UUID; things get
really confused if they do. For Windows the side-effects extend to the
network, and allow some pretty massive security holes (I log in on my
machine with the same security identifier (SID) as your machine, I can
do bad things to your machine if I log in as Administrator on my
machine). No two 'security principals' in Windows-land should have the
same SID (see https://en.wikipedia.org/wiki/Security_Identifier for an
explanation of SID).
Chief Technology Officer
Pisgah Astronomical Research Institute
1 PARI Drive
Rosman, NC 28772