Linux May Succeed Windows XP As OS of Choice For ATMs
Dega704 sends this news from ComputerWorld:
"Some financial services companies are looking to migrate their ATM fleets from Windows to Linux in a bid to have better control over hardware and software upgrade cycles. Pushing them in that direction apparently is Microsoft's decision to end support for Windows XP on April 8, said David Tente, executive director, USA, of the ATM Industry Association. 'There is some heartburn in the industry' over Microsoft's end-of-support decision, Tente said. ATM operators would like to be able to synchronize their hardware and software upgrade cycles. But that's hard to do with Microsoft dictating the software upgrade timetable. As a result, 'some are looking at the possibility of using a non-Microsoft operating system to synch up their hardware and software upgrades,' Tente said."
and if it's really, really cheap to do.
Oh if only Microsoft had given them more than like 10 years notice of end-of-support, they might have had time to prepare....
So does this mean we can expect our special hardened ATM Linux OS to have names like Filching Finch, Moneybiting Mongoose, Overcharging Oranguatan?
What you're refering to as Linux, is in fact, GANOOOOOOOOOU Linux
What's a desktop operating system doing on an ATM anyway?
Pretty good is actually pretty bad.
I was told OS/2 was the choice for ATM operating systems!
I guess I'm missing the difference. Linux distros and kernels do indeed go EOL. When that happens there are no more security updates and backporting right? Well how is that different than what MS is doing right now with XP? In either case they will still have to face the fact that the OS isn't going to be supported anymore and will require them to upgrade software.
Or are they thinking they will go it alone and continue to update their Linux distro/kernel just because it is open source? Do they really think they are qualified to do that? Or is the hope that they can spend money to keep the OS in long-term-support status?
If you can't be good, be good at it!
Yes it's free, but I'm sick of the "it's more secure" nonsense. It has the potential to be secured properly by the integrator, but that's it.
It still costs a shitload of money to change platforms for an established product - especially since Win7/8/... are quite different with regards to file structure, user management, security, etc. And by nowmost security holes have been closed in their version of XP. Well, now that they switch to something open, M$ won't be able to pull another XP on them :-)
Delta-Mike November Bravo Tango
Finally, the year of Linux on the... oh wait... ATM.
If Pandora's box is destined to be opened, *I* want to be the one to open it.
"Pulling an XP" ... is that some kind of euphemism for supporting a product long past industry standards for free? Funny you use the little $ in "MS", seeing as that they haven't asked me for a single cent for updates to my XP box since 2001.
Because apparently all of them are equally incompetent.
They should be developing their own OS anyway. I guess they'll call it ATMOS.
Get free satoshi (Bitcoin) and Dogecoins
So, I'm all for them switching away from MS....
But the idea that they need to sync their software upgrades with their hardware upgrades is RIDICULOUS.
Are you kidding me? How do they deal with patches? How do they deal with exploits?
Hardware on an ATM can't get replaced THAT often and if that's when they want to run software updates?
Windows based ATM machines are almost certainly running on XP Embedded, rather than the retail version of XP... support for Embedded doesn't end until January 2016. Thus, if the financial industry is moving away from XP to Linux, it isn't necessarily related to Microsoft's XP support schedules.
Why an ATM was hosted on XP in the first place is beyond me. I suppose you dance with the one who brought you and banks are solidly Windows shops, but using XP for a device where security and reliability is paramount seems like a bad choice, at least in hindsight. I suppose in the depths of the XP heyday, when the base design decisions where being made, Linux was a decidedly hit and miss affair (mostly miss). X support was spotty and other devices had limited support. I remember the heady days of installing slackware and configuring video card and monitor by editing that text file. XP must have looked pretty good.
Now, ATM venders are faced with having to port everything to newer versions of Windows, which forces them into more expensive hardware (faster CPU's, more memory, greater drive space, modern video hardware etc.). This in the face of being able to keep using the old proven hardware, put Linux on it and get another decade or two, not to mention control of your own destiny because the source code is available and free. You are going to pay to retool to Linux, but you get to step away from Microsoft license fees. It's a long term gain, short term loss.
Maybe they will make the right choice this time? Who are we kidding... You KNOW that Microsoft has pulled out all the stops on the Redmond FUD machine and would gladly cut some "deals" to keep these guys on the hook and make Linux look less desirable in terms of ROI.
"File to fit, pound to insert, paint to match" - Aircraft Maintenance 101
Most businesses don't think that far ahead, at least when it comes to things which are not their core business...
The idea that they would make their business dependent on software only available from a single vendor is equally staggering.
http://spamdecoy.net - free throwaway anonymous email - avoid spam!
If Red Hat or any of the other well-known distros had a spin I could burn to a thumb-drive that was XP-user-friendly, I could show it off and expect what my company's receptionist once asked: "That looks nice, what version of Windows is this?"
A colleague had installed Linux on the reception PC, and left a yellow stick to tell the receptionists to ask me for the password.
--dave
davecb@spamcop.net
No. Not really. Even a competent NT admin has to some clue. Otherwise you're just kidding yourself and sitting on a ticking time bomb.
A Pirate and a Puritan look the same on a balance sheet.
Most tradesmen appreciate cash.
W..w..W - Willy Waterloo washes Warren Wiggins who is washing Waldo Woo.
All the banks just had to replace their ATMs with audio-capable ones because of the ADA, so now they get to replace them all over again because of XP being EOL. Why would the ATM vendors want to adopt Linux, when they can use MS EOL as a convenient excuse to get the banks to replace their ATMs yet again in the future?
People still walk into the bank and talk to a teller asking a person for money withdraws.
Old people.
But they're old people with money, and so we still have offices with bored people behind counters watching you fill out those ridiculous slips rather than telling them what you want.
Tradition man. It's cultural inertia. And it's a massive bloody bitch that usually takes blood to change course.
Good for you. Meanwhile I'll pay cash in hand for some things and get a discount. What the taxman doesn't know about...
So how is support for RHEL 2.1 (a year younger than XP) these days?
Of course news about a fake are Fake News.
Well that a business would decide they didn't like having support dropped, so much so that they plan on moving to something unsupported all the time is ludicrous.
Wait until a bank goes to hire linux support employees. As most moves to Linux, I expect this one to last about 26.2 seconds.
slashdot troll = you make a compelling argument I do not like the implications of.
Well, that doesn't really answer the question. You also need the other half of the answer: that our culture has developed in a way that makes avoiding the services offered by the companies building and operating ATMS rather severely inconvenient.
--- Most topics have many sides worth arguing, allow me to take one opposite you.
Given the long notice on Windows XP end of life, why is this just being considered now? I would expect vendors to announce they have completed or have started their migration to a newer platform. And Linux is a very reasonable choice for this, and it was years ago. QNX, VxWorks was as well. It's not like Linux became a reasonable embedded OS just this year, but it seems like the companies are thinking that. "Oh, hey, maybe Linux isn't too bad after all." Weird.
And, there is Windows 7 embedded, if you want to upgrade not port. I understand being conservative, but this just seems like bad crisis planning at the last minute. Also, with the new card standards coming up, it seems the industry knew there was a need for new systems in plenty of time to create and implement a migration plan.
Might be the push Linux needed.
They went with XP because it has some API similarities to the previous generation OS/2 machines.
I am becoming gerund, destroyer of verbs.
This is not just about support, but also about availability and continuity. The fact that YOU did not have to pay a cent means nothing when compared to companies that licenced millions of copies of XP (>2.000.000 ATMs). and that soon will have to switch to another product for replacing old and/or broken machines. By industry standards, Microsoft is an unreliable player!
Delta-Mike November Bravo Tango
You can't 'tell them what you want' ... they'll hand you back a slip and tell you to fill it out and sign it ... which is what you do when you poke the buttons and enter your pin number at an ATM.
You're naive at best.
Banks are some of the most ruthlessly efficient organizations on the planet, by their very nature.
First off, those bored people behind the counters 'watching you fill out those ridiculous slips' aren't bored, I promise you they've been working ALL day, doing something the bank hasn't yet automated. Just because the counter is high and you can't see they've been counting night deposits doesn't mean they were just sitting back their rubbing one off.
Second, the slips are not so you can 'tell them', its so the bank has a record of what YOU told them you were asking for or giving them, and BEFORE The transactions complete, they can reject it. If they accept it, they have, IN WRITING, what YOU requested from them, and how they filled it. They are protected against YOUR mistakes in transactions. The ATM does the EXACT same thing, but you just don't realize its doing it. This is a matter OF LAW, not practice or fun. This kind of stuff goes right along with the regulations that let them put that nice little Insured by the FDIC sticker on the window.
Third, Awesome, you think because the bank has off loaded doing their job onto YOU and a machine, that people who use the old method, where the bank actually provides services ... are the ones with a problem. And notice ... those people have ... money.
Irony: You think you're smarter because the bank is much more efficient at ripping you off than those stupid old people. Congratulations, there is an old dude sitting in an office, laughing his ass off about how you and the kind of ignorance you carry with you, filthy fucking rich.
ATMs are banks giving you less service and charging you for the privilege. You're an idiot. You kinds of guys are mind blowing to me. So excited about the new hotness not being 'old and busted' to notice that 'new hotness' is in fact, busted from the start and 'old and busted' got the job done better and cheaper.
Persistent Volume manager for Kubernetes - https://github.com/dwimsey/openshift-pvmanager
Looking at the lifecycle fact sheet, Microsoft are currently giving 9 years notice on when 8.1 will end extended support.
How many years do they want? If they cannot manage with nine years notice, realistically how will a few extra years help?
Secondly, what makes them think that if they installed Linux that they wouldn't need to do any further upgrades?
Avantslash - View Slashdot cleanly on your mobile phone.
Which company? The Bank or the ATM builder? There are only so many ATM providers, I can only kind of blame banks. The ATM providers, should pay for this. Banks should switch away from DIebold and the like that have used Windows XP for so long.
Well.. maybe. Or Maybe not. But Definitely not sort of.
I can remember the first of the small, low power netbook type computers coming on to the market - the EeePC type machines? And they all ran Linux because they couldn't run Vista.
So, if MS had terminated XP at that time they would have put themselves out of that market. Of course they were not prepared to do that at any cost, because it would have put Linux directly in the hands of consumers, so they extended XP and unfortunately Linux disappeared from all the netbook computers.
So, we have Linux to thank for the long support for XP, not charity on the part of MS.
...in order to extract more favourable terms during licensing negotiations with Microsoft, nothing more.
Nothing to see here.
What industry standards exactly? If these ATM companies went with any other vendor, they would have already had to upgrade their OS years ago due to EOL.
If you've never used any variety of Linux before, you will need training.
You can be a whiz at writing scripts and batch files to do things on the Windows side, that does not mean you will magically know how to do things on the Linux side.
Just because I am very capable of writing a presentation for the higher ups or giving a speech does not mean I have the capacity to write a book.
We will bankrupt ourselves in the vain search for absolute security. -- Dwight D. Eisenhower
Wouldn't we have Microsoft's own incompetence with Windows Vista to thank for that?
This is just a bid to get bargain basement pricing on the next Microsoft OS. Threaten to move to Linux and the Microsoft Sales Droids will cut the licensing fee for whatever Windows you want down to an almost reasonable price.
Though without Ballmer, that's not the slam dunk prediction it used to be...
Wouldn't we have Microsoft's own incompetence with Windows Vista to thank for that?
No, just Microsoft's determination to exclude others from the computer market.
The other thing I just remembered, was that XP was already being shut down at the time. Retail copies were no longer available. The only way you could still buy XP was to have it pre-installed on a tiny portable that was incapable of running any other MS product.
Yes, and the vendor would have made sure that their platform is backwards compatible. With Industry, I don't limit myself just to IT!
Delta-Mike November Bravo Tango
Most countries, obviously including economically advanced and powerful Germany (where I live) also use ATMs (Geldautomaten). Here, the culture is still such that "cash is king". Other than supermarkets, huge chains like Ikea, H&M and McDonalds, there are very few places that you can use a debit/credit card to pay for goods and services. Asking "people still use cash?" is centered around a single first-world culture and in no way representative of the wider presence of ATMs.
Comment removed based on user account deletion
That, or all these cretins got larger bonuses and maybe pay-offs from MS, and when the magnitude of their mistakes became apparent, they were already out of reach.
Most ACs are not even worth the keystrokes to insult them. Be generically insulted by this and ignored otherwise.
First comment that makes sense to me. I had OS/2 on the PC. Very, very impressive. If quality were an important factor in sales, MS would never have had a chance against OS/2. Pity.
Most ACs are not even worth the keystrokes to insult them. Be generically insulted by this and ignored otherwise.
Really? Why? You don't think there's a good supply of programmers who know Linux out there from, oh, all the telecoms*? Or most of the stock trading companies? How 'about Fortune 500 companies that use some other version of Unix, like, say, Lowe's?* Or how about Android programmers? Or.... shall I go on?
You's is a statement based on no facts, or ignorance thereof.
mark
* Why, yes, I have worked at two major telecoms, and a short contract at Lowe's, so yes, I do actually know what I'm talking about.
These machines are decedents of machines designed many years ago, when linux was less mature. Many of them still use OS/2.
I have an older laptop which is set up to dual-boot between XP and Linux. It only has 1GB of memory and the dvd drive crapped out years ago so upgrading is not an option. The Linux version I have on there is long-life, but updates ceased at the end of last year and it was a *lot* younger than XP. Suggesting that a Linux release will be around longer than XP was is being optimistic, and if there is such a beast, was that choice obvious 10 years ago?
In my previous job 10 years ago I had responsibility for maintaining a small Linux server for three years. I was running NFS and FTP on it. In those three years the distribution's FTP-server-of-choice changed twice, I kept with ProFTPD because that way my scripts still worked.
XP was supported for far longer than any version of Linux was.
What upgrade path should they have taken? XP's end-of-life was actually deferred a couple of times - basically because Vista was such a turkey. Once Windows 7 came out that option was no longer necessary. Apple also have shorter cycles than Microsoft.
Mielipiteet omiani - Opinions personal, facts suspect.
Indeed. And "file structure, user management, security, etc." have variations in the UNIX ecosystem, but many, many similarities. On API-level you often do not even notice what UNIX or UNIX-like OS you are running on. The MS API stability level today is maybe where UNIX was 40 years ago, namely when they were experimenting around a lot. MS never stopped experimenting, because they are not engineering driven (i.e. want a good product), but revenue driven. And then messes like the Win8 disaster happen that make everything different. Completely unacceptable for devices than run for decades.
Most ACs are not even worth the keystrokes to insult them. Be generically insulted by this and ignored otherwise.
I thought exactly business like ATM fleets would be RedHat's target -- people who need robust Linux with support -- all negotiable.
MS is consumer-trash. The only reason any good OS vendor stops supporting an OS is when they go bankrupt, when nobody is using it anymore or when they have an adequate (i.e. no porting effort) replacement.
Most ACs are not even worth the keystrokes to insult them. Be generically insulted by this and ignored otherwise.
I seriously doubt this; it's all about getting better pricing from Microsoft, period.
I'm willing to bet there are still plenty of linux options you can run on that laptop. You can either install from pxe, or a disk image. I do it all the time with older equipment. If you had hundreds of machines with similar architecture, you would probably invest in back-porting of patches.
or you can do something like this:
https://www.suse.com/support/p...
https://ltsi.linuxfoundation.org/what-is-ltsi
Cheap storage VM.
The tellers at my credit union have always been quite helpful when I asked them for help.
What bank do you use that the tellers demand you sign a slip before they even talk to you?
You're naive at best.
Banks are some of the most ruthlessly efficient organizations on the planet, by their very nature.
BAHAHAHAHAHAHAHAHAaaaaahhh oh man. I can't believe you called me naive and then IMMEDIATELY made that claim. That's too good.
okokok, lemme just try and sort you out. Baby steps. If banks are "ruthlessly efficient by their very nature", then why are bankers well paid? Why the nice building? Why do you think the "old dude sitting in an office" is "filthy fucking rich"? Does that sound like ruthless efficiency?
If they were ruthlessly efficient, wouldn't they be sckrimping? Hiring the cleaning services only every other day. Struggling to attract employees because the pay was so shitty. Putting branches in old closed McDonalds buildings rather than downtown stonework or ritzy new buildings.
Irony: You think you're smarter because the bank is much more efficient at ripping you off than those stupid old people.
You're pretty argumentative. Do you consider yourself old or something? I never claimed to be smarter. Indeed, I actually like having a teller there. I can walk in without even having that bank card and I can walk out with money. But the ATMs are much more efficient for getting me my money in a hurry.
But no, I recently interviewed at a bank. Er, credit union. They made a big deal about the distinction. SQL-monkey position they tried to hype up. If I took it I imagine I'd have a lot more to say about how their ancient Symitar system running on XP sucks ass. Anyway, during the interview their head of IT was complaining about how they still had to hire tellers in their branches strictly because old people expected there to be tellers and that young people accepted ATMs much better.
So my personal views aside, THE REASON that banks still have tellers is because they're still courting the older demographic. At least per what someone in the industry mentioned to me once. But hey, it makes sense.
'old and busted' got the job done better and cheaper.
You've never employed someone have you?
The only way you could still buy XP was to have it pre-installed on a tiny portable that was incapable of running any other MS product.
You could also buy machines that had a windows vista buisness (or ultimate if you wanted to throw money away) license but had XP pro installed under downgrade rights.
note: i'm known as plugwash most places but i screwd up registering that here somehow in the past and now can't register
Come on GEOS , now's your chance to shine as a replacement for Windows!
If telephones are outlawed, then only outlaws will have telephones.
If they are replacing XP, they should do it w/ Windows 8. As has been previously pointed out, while Metro is awful for desktops, it's just perfect for touch-screens, like you have on ATMs.
Actually, aside from Linux, the ATM companies could have tried either ComStation and OS/2, where they already have rich experience, or tried getting work done on osFree. With the last, they'd have gotten an FOSS OS/2, and been able to put in just what's needed. With REXX support and the other OS/2 specialties, they'd have been good to go
For a hardened system, anything that the user needs to modify can be put into a simple interface.
Cheap storage VM.
Which is still in alpha stage
If these systems are still using XP today, my bet is that they only rely on a small, stable, well-established subset of what we consider today's Windows API. It really wouldn't surprise me at all if a whole bunch of the software involved built flawlessly with winelib.
Anyone know if that's how they're going about it?
I know some ATMs that used to use MS-DOS. How's that for security?
#sudo gvmemny -t\$ -n1000000
Hmm In my experience the teller fills out the slip for me, I review and sign it. YMMV though.
they plan on moving to something unsupported all the time
Pretty sure Linux isn't unsupported. If you're so inclined, you can pay for support if you want it
Unlike with Windows, you get your pick of providers (and yes, that includes big-name, management-friendly corporations), for any particular aspect/application of Linux.
For example, Redhat/CentOS is 10 years. However there is always the option to pay someone to roll-back updates into whatever version the ATM has, which is onet thing you can't do with a closed source OS. As far as security is concerned, I would have thought something like QNX would be a better choice than either Windows or Linux. Anyone know what EOL time QNX offer? I couldn't see just be glancing at their website.
Good God, I had no idea all our money was handled by Windows!
You'd think they would go for a security centric OS like OpenBSD or something even more exotic rather than Linux or *shudder* Windows. Yeesh.
Yeah, I recently installed the most recent Linux Mint LTS (13 Maya) on a 12 year old laptop. It wouldn't boot from the CDs of older releases (presumably because it couldn't handle overburned CDs with more than 640MB). But I was able to use a Plop boot CD to boot from an old 1GB flash drive using the laptop's lone USB 1.1 port. So even without a PXEBoot server setup, there are still some options.
Laissez lire, et laissez danser; ces deux amusements ne feront jamais de mal au monde. - Voltaire
You might have a non-PAE processor.
I have an old IBM T40 and went through the "herb garden". Several failed, but eventually one decided to give a meaningful error message.
Confucius say, "Find worm in apple - bad. Find half a worm - worse."
> If you've never used any variety of Linux before, you will need training.
That's true across the board. That's the problem with the usual propaganda that you can be a total clueless idiot and still be a Windows admin. The same skill, aptitude, and inclination that's required to be a Unix admin is also required to be a COMPETENT NT admin.
Otherwise you're just kidding yourself and sitting on a a time bomb.
Windows just makes it easier to kid yourself. It makes it look easy and gives the appearance that you can ignore the underlying details.
The NT admins that aren't just a waste of skin are capable of getting Unix certs just for lulz.
A Pirate and a Puritan look the same on a balance sheet.
XP is an emoticon.
When at home in The Netherlands all stores accept debit, when on holidays in Denmark the same.
Yes these are First World countries but the trend is unstoppable, cash is now the minority means of money transfer.
At the same time this means people carry less cash and need and want to top up wherever they are.
"The likes of Facebook and WhatsApp are free to those whose privacy is of zero value."
OS/2 was originally a partnership between IBM and MS, MS almost scuttled it by pulling out of the deal half way through development and releasing NT instead. Personally I think MS's involvement was a ploy to try to stop IBM entering the PC O/S market while at the same time gaining access to their OS2 engineers.
And did you exchange a walk on part in the war for a lead role in a cage? - Pink Floyd.
It makes more sense to go with [???] BSD or even Linux rather than a full [...]
FTFY
CLI paste? paste.pr0.tips!
ATMs are banks giving you less service and charging you for the privilege.
That's funny. I've never paid a fee to use an ATM. Ever. Regardless of what ATM I use. I suggest you get a better bank, because if they nickle-and-dime you for crap like ATM withdrawals you are probably getting fuckin *screwed*.
And I find ATMs provide me a far better service. In fact, I currently live 500 miles away from the nearest branch of the only bank at which I have an account. Been like that for two years. Never had a problem. 90% of my banking is done online, and when I need cash I can go to any of the ATMs within walking distance or any of the dozens on my drive to/from work or literally just about anywhere in the goddamn *world* and pull out as much as I need. 24 hours a day, no line, no wait, no fee.
Try getting cash for the laundry machine from a bank teller at 8pm on a Sunday night....
lol. The places you worked at, I managed at. Most Linux types, especially the ones hanging around slashdot, are clueless ideologist. The ones that do know what they are doing are expensive as hell (and I do not blame them).
Let's start with the basics; is Unix/Linux more secure than Windows? If your answer is "yes", you fall in the clueless category. If on the other hand you answer "it depends on how they are setup" you have hope.
Don't tell me I'm clueless, I've hired and fired, in both environments, which is exactly the basis for my position. you?
slashdot troll = you make a compelling argument I do not like the implications of.
Finishing my computer engineering degree this semester. The way I've been taught how to implement a system like this is the following :
1. The outermost "user land" control panel should use an OS that is both lightweight, will work on a lot of hardware (so you can switch hardware if during the production of the ATM a vendor goes out of business), and offers a lot of graphical libraries for a pretty interface. Android sounds ideal for this.
2. The android display would communicate via network (probably TCP/IP) with a small server running an embedded flavor of Linux. This server would be stripped down to the minimum features and services, running on a tiny little ARM architecture chip. It would be the computer that actually talks to the bank via encrypted link and controls the cash dispensing process.
3. For the actual physical interlocks and running the motors to dispense the cash, you'd communicate via a serial bus with several small microcontrollers or PLL controllers. Each would be running a very simple program written in C (or ladder logic tree) to do their jobs, which would be to do the actual dispensing and monitoring all the various switches and so forth.
The point of this hierarchy (rather than using one computer to do everything directly) is to compartmentalize the design, allowing you to debug it more easily and also improving security. Someone compromises the outer control panel - they won't be able to dispense cash.
That is interesting. I have never heard or seen slips in Canada. They just print off a receipt and you sign a copy. Or what happening more often is there is debit machine that you use like an ATM and then you don't sign anything, but still get a receipt. There are bunch of things only a teller can do too. I probably use one four times a year.
When I go to a teller at my Credit Union, I just hand them my bank card, tell them what I want, and they key it in. Then I just sign the receipt when all transactions are done. No filling in of forms. No going only to my "home" branch for free service. I used to have to do those things...20 years ago.
That laptop has a mobile consumer Pentium III. I'm pretty sure it didn't have PAE. Even so, it booted from USB, which used the standard DVD image, dd'd to the USB key. Not the same release admittedly ... but I didn't see anything indicating they had relaxed the PAE reqt. for Mint 13 Maya.
Laissez lire, et laissez danser; ces deux amusements ne feront jamais de mal au monde. - Voltaire
I was amazed once to see win3.1 installed on my local ATM. Since been upgraded to XP. I noticed that Tesco's self service pos are all XP too, another opportunity for Linux to step in.
Great info. Just as a relevant experiment on topic, let us know what any of those would charge, for support of a linux the same age as XP. Oh, and let us know if they laugh when you ask.
slashdot troll = you make a compelling argument I do not like the implications of.
They've been dead here for 5 or 10 years. Before that, they were the norm. With banks that had a stated focus on customer service, if you didn't fill one out, they would and have you sign it.
Sure I'm paranoid, but am I paranoid enough?
cat /proc/cpuinfo | grep flags will tell you.
They tend to be unrelaxing it, if you know what I mean. For example CentOS 5 (RHEL clone) works on non-PAE, 6 is PAE only. There isn't really that much old hardware around, so they probably think it's not worth the effort of complicating the installer.
I didn't keep notes on exactly which worked and which didn't, but even the ones that installed had quirks. Currently it's got Backtrack, which is ubuntu with a bag of security testing on the side.
Confucius say, "Find worm in apple - bad. Find half a worm - worse."