Re: [CentOS] What are the differences between CentOS Linux and CentOS Stream?

2020-12-15 Thread Kevin K
As a bystander who just the other day saw this, no.  It doesn't appear that
it will be a bleeding edge kernel.  Just builds of the next kernel expected
to be in the next 8.X release.  So you are getting updated features
earlier, but maybe before all the known issues are resolved to a state
ready to be released in the main RH build.

For my work use of Red Hat, this all doesn't matter.  We license and pay
for many copies of RHEL.  It is only for home use that I've historically
used CentOS.  And even then I can get a personal license of RHEL.

On Tue, Dec 15, 2020 at 9:29 AM Turritopsis Dohrnii Teo En Ming <
teoenming.dec2...@gmail.com> wrote:

> Good day from Singapore,
>
> What are the differences between CentOS Linux and CentOS Stream?
>
> At the moment, I only know that CentOS 8 support will end on 31 December
> 2021 while Red Hat Inc will shift its focus to CentOS Stream.
>
> Is CentOS Stream going to be very similar to Fedora Linux, shipping with
> the latest Linux Kernel like 5.10.1?
>
> I am looking forward to hearing from you.
>
> Thank you.
>
>
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> -END EMAIL SIGNATURE-
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[CentOS] PCMCIA on Centos 7

2019-02-02 Thread Kevin K
Anyone ever look into what would be required to support 16 bit PCMCIA cards
on 7?

There are still 64 bit computers out there with at least 1 PCMCIA slot.

Thanks,
Kevin
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Re: [CentOS] non PAE support

2011-07-27 Thread Kevin K

On Jul 26, 2011, at 10:55 PM, John R Pierce wrote:

 On 07/26/11 4:27 PM, Kevin K wrote:
 Does anyone know what I would have to modify in 6 if I wanted to run on an 
 older Pentium M CPU without PAE?  Is it just the kernel that needs to be 
 rebuilt (maybe while installed in a system with a supported CPU)?  Or are 
 there other components that would cause problems and need to be rebuilt too?
 
 generically, you'd install the kernel srpm, and modify its rpmbuild 
 scripts to change the HIGHMEM64G kernel configure option to HIGHMEM4G 
 ... I would also change the name of this kernel (I'd add -noPAE to it, I 
 think), and the builder name, then run rpmbuild.
 
 specifically, I haven't done this in quite a long time, so would have to 
 figure out the details as I went along.

Thanks.  I had worried that there might be some other packages that would have 
to be updated.  Like back in the day when OS's started to target 686's, and a 
few other packages like glibc would have a 686 version.
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Re: [CentOS] non PAE support

2011-07-27 Thread Kevin K

On Jul 27, 2011, at 4:53 AM, Marc Deop wrote:

 On Tuesday 26 July 2011 20:55:58 John R Pierce wrote:
 On 07/26/11 4:27 PM, Kevin K wrote:
 Does anyone know what I would have to modify in 6 if I wanted to run on an 
 older Pentium M CPU without PAE?  Is it just the 
 kernel that needs to be rebuilt (maybe while installed in a system with a 
 supported CPU)?  Or are there other components that 
 would cause problems and need to be rebuilt too?
 
 generically, you'd install the kernel srpm, and modify its rpmbuild 
 scripts to change the HIGHMEM64G kernel configure option to HIGHMEM4G 
 ... I would also change the name of this kernel (I'd add -noPAE to it, I 
 think), and the builder name, then run rpmbuild.
 
 specifically, I haven't done this in quite a long time, so would have to 
 figure out the details as I went along.
 
 
 
 And how exactly would you do that if the installation just can't proceed if 
 it detects you do not have a PAE processor?

One way would be to move the hard drive to a supported system, install there, 
then move it back.  I've done that before when, for whatever reason, the 
install program didn't like something in the computer and hung, such as during 
hardware detection, but the installed system ran.

Kevin
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Re: [CentOS] non PAE support

2011-07-27 Thread Kevin K

On Jul 27, 2011, at 12:33 PM, Always Learning wrote:

 
 On Wed, 2011-07-27 at 10:15 -0700, John R Pierce wrote:
 
 you can build the kernel RPM on any other similar environment, and   
 WHY ARE YOU/WE WASTING Y/OUR TIME ON A 6  YR OLD LAPTOP???   Get over 
 it.  Either run what works on it, or get suitable hardware to run what 
 you need.
 
 Merely because something, or indeed someone, is old but still capable of
 functioning should not mean it, or they, are discarded.
 
 Last night I was watering the rear garden with attachments brought (I
 recorded the date and price underneath) 22 years ago AND those spraying
 attachments worked perfect. The 26 66cm television is my bedroom is 14
 years old. A six year old laptop, which works, is an interesting
 candidate for exploring Centos and EVERYONE should be encouraged not to
 throw away functioning items simply because they are 'old'.
 
 When a Centos user wants to explore the richness of the many facilities
 in Centos on an old laptop it shows the person has an enquiring mind.
 Such people should be encouraged not ridiculed.

Yet another decision made by Intel at some point that comes back to haunting 
us.  Pentium Pro supports PAE.  Pentium II, Pentium III.  Pentium 4.  But not 
some early Pentium M's.  Then supported again.  (I haven't checked the Atom).  

I'm guessing that, even though the Pentium M was based on the Pentium III, 
someone thought that, since it was targeting laptops, who would ever need more 
than 4GB of RAM.  So why have include it.
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[CentOS] non PAE support

2011-07-26 Thread Kevin K
Does anyone know what I would have to modify in 6 if I wanted to run on an 
older Pentium M CPU without PAE?  Is it just the kernel that needs to be 
rebuilt (maybe while installed in a system with a supported CPU)?  Or are there 
other components that would cause problems and need to be rebuilt too?

Thanks,
Kevin
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Re: [CentOS] SSD for Centos SWAP /tmp /var/ partition

2011-05-26 Thread Kevin K

On May 26, 2011, at 3:36 AM, Emmanuel Noobadmin wrote:

 On 5/26/11, Kevin K kevi...@fidnet.com wrote:
 Though thumb drives are flash, they tend to use a slower flash than what is
 used in hard drive replacement units.
 
 No actual industry facts for this, but I think the Flash used in thumb
 drives are not really any slower by nature/design. This is because I
 see that the fastest SSD currently tend to use 8 channel controllers
 for 200+ MB/s performance which translate to 20~30MB/sec per channel.
 
 The better USB 2.0 thumb drives can do about 20+ MB, Kingston even has
 a new one that will supposedly do 70+ when connected via USB 3.0. If
 we take 8 of these and RAID 0 them which is pretty much what the
 8-channel controller is doing, we're looking at pretty similar numbers
 between the flash cells in thumb drives and SSD.
 
 
 I think that many people, when talking about SSD, may be thinking of drives 
 in the form factor of a hard drive.  Either 2.5 or 3.5.  Which would 
 probably not be called a thumb
 drive :)
 
 Only because it doesn't come with a USB connector! ;)

OK.  Not really slower for the flash, but still slower than what an USB based 
SSD drive would be.  But since they are designed for USB, performance can be 
lower.  Especially for the cheaper drives.  I would assume, but don't know, 
that those drives marketed as ReadyBoost (?) for Vista or later may be faster .

Another thing that probably makes them seem slow is when some systems default 
to write cache disabled.  For protection on systems like Windows where people 
might not remember to safely remove.

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Re: [CentOS] SSD for Centos SWAP /tmp /var/ partition

2011-05-26 Thread Kevin K

On May 26, 2011, at 3:49 AM, Emmanuel Noobadmin wrote:

 On 5/26/11, John Hodrien j.h.hodr...@leeds.ac.uk wrote:
 Spinning disks seem an awful lot like victorian technology taken too far.
 In
 the long term, what's *not* to like about the idea of fully solid state
 storage?
 
 Personally, I'm averse to using SSD with any important long term data
 is the nightmare that I could one day wake up to find everything gone
 without any means of recovery. Compared that to a hard disk, which
 barring catastrophic physical damage, I could pay somebody to just
 read the data off the platter.
 
 As a performance boosting intermediary storage, yes, long term...
 maybe not quite yet

multiple layers of backup.  My main system has a main system.  With scheduled 
backups to an external hard drive, and online.  I have a lot of data on it like 
pictures that I wouldn't want to lose.  A SSD would replace my main boot drive, 
with faster access to data as used.  But the external drive would still be 
there for backup.

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Re: [CentOS] SSD for Centos SWAP /tmp /var/ partition

2011-05-26 Thread Kevin K

On May 26, 2011, at 8:12 AM, John Hodrien wrote:

 On Thu, 26 May 2011, Ljubomir Ljubojevic wrote:
 
 Unless you are away on important business trip and you loose your system
 just minutes before the meeting. Yes, it can happen to regular HDD, it's
 much lesser probability for now.
 
 If I'm going to a meeting where I've got documents I need, they'll be on the
 laptop, on a USB stick, and probably on a network accessible store as well.
 
 I doubt an SSD is likely to be the least reliable part of a laptop.

I've done that too.  Travel, with data or code on hard drive, backup USB drive, 
and also burned to DVD or CD.  I may ship the computer, but hand carry the DVD 
or thumb drive.
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Re: [CentOS] SSD for Centos SWAP /tmp /var/ partition

2011-05-25 Thread Kevin K

To bad I don't make purchasing decisions at work, or I would like a SSD for my 
Linux system, probably to be upgraded to 6 later in the year.
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Re: [CentOS] SSD for Centos SWAP /tmp /var/ partition

2011-05-25 Thread Kevin K

On May 25, 2011, at 3:28 PM, Emmanuel Noobadmin wrote:

 I don't know... SSD drive with a USB interface sounds a big
 mouthful... most people I know just call thumb drives :D

Though thumb drives are flash, they tend to use a slower flash than what is 
used in hard drive replacement units.  I think that many people, when talking 
about SSD, may be thinking of drives in the form factor of a hard drive.  
Either 2.5 or 3.5.  Which would probably not be called a thumb drive :)

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Re: [CentOS] SSD for Centos SWAP /tmp /var/ partition

2011-05-24 Thread Kevin K

On May 24, 2011, at 10:25 AM, Rudi Ahlers wrote:
 
 
 
 But don't you think that a SSD, or rather Solid State Drive, would
 still be seen as a different type of drive than a SATA drive, even
 though they share the same type of bus  connector + power cable?
 
 I know you get some USB type SSD's, but people still refer to them as
 SSD drives, and not USB drives

Depends on what level you are looking.  Generically, it is a sequence of 
blocks, just like a rotating hard drive appears.  Proper ID commands can find 
out more detailed information on it.

Some computers, like the Macbook Air, have SSD but it is NOT SATA.  It is 
plugged into an expansion slot.  I have also seen other SSDs that plug into PCI 
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Re: [CentOS] SSD for Centos SWAP /tmp /var/ partition

2011-05-23 Thread Kevin K

On May 23, 2011, at 4:48 AM, Rudi Ahlers wrote:

 On Mon, May 23, 2011 at 11:31 AM, Kevin Thorpe
 kevin.tho...@pibenchmark.com wrote:
 Just be aware that SSDs wear out. They have a limited number of write
 cycles.
 Nowadays they all do 'wear levelling' to even the writes across the drive
 but
 even so they don't last very long in heavy write usage.
 
 
 
 Doesn't SATA and SAS drives also wear out?

A SSD drive can be a SATA drive.  SATA is the connection/protocol between the 
drive and the computer.


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Re: [CentOS] RHEL 6/CentOS

2011-05-10 Thread Kevin K
If I had to guess, it would be that the OS is considered an enterprise OS, 
and that the CPU is too low end, now, to be considered that.  It is kind of low 
end now for even personal use.

Not that people only use the OS for high end server hardware :)

At work, we still have to support 500MHz Pentium IIIs with 128MB of RAM.  
Hopefully that requirement will be dropped before we migrate to 6.  We had to 
make kernel modifications to even get the PCMCIA support to work on it.
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Re: [CentOS] virtualization on the desktop a myth, or a reality?

2011-03-03 Thread Kevin K

On Mar 3, 2011, at 6:38 AM, Always Learning wrote:

 
 On Wed, 2011-03-02 at 19:18 -0800, Dr. Ed Morbius wrote:
 
 It far and away already has.  Dual-booting is a bastard compromise which
 forces you to select between altnernative OSs, doesn't allow for
 simultaneous access to features (and storage) of both, and generally
 necessitates use of some low-standard transfer storage partition (e.g.:
 vfat).
 
 My dual-booting, actually tri-booting, with Vista (ugh!), Centos
 (brilliant) and Fedora 14 (not keen and a bit seriously buggy) allows me
 in Linux to access and change the file space content used by the other
 two operating systems.  Surely that constitutes simultaneous access to
 storage? 
 

If you are tri-booting, how are you accessing the file systems of the other 
OS's at the same time?  Don't you have to reboot to change OS's?

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Re: [CentOS] IP6 Anyone?

2011-02-26 Thread Kevin K
2 hex digits is 1 octet (or byte).

On Feb 26, 2011, at 3:04 PM, Always Learning wrote:

 
 On Sat, 2011-02-26 at 20:58 +, sheraz...@yahoo.com wrote:
 
 IPv6 has twice (8) segments compared to IPv4 however each segment
 is 2 octets making IPv6 address space 4 times (128 bits) compared
 to IPv4 (32 bits).
 
 Oct... means 8. 
 
 Each segment of an IP6 segment can contain 4 hexadecimal digits.
 Hexadecimal means 0 to F.
 
 Are you sure 'octets' is correct?
 
 -- 
 
 With best regards,
 
 Paul.
 England,
 EU.
 
 
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Re: [CentOS] RAID support in kernel?

2011-01-30 Thread Kevin K

On Jan 30, 2011, at 7:36 AM, Robert Heller wrote:

 At Sat, 29 Jan 2011 22:33:50 -0500 CentOS mailing list centos@centos.org 
 wrote:


 Many of the SATA (so-called) hardware raid controllers are not really
 hardware raid controllers, they are 'fakeraid' and requires lots of
 software RAID logic.  You are generally *better off* to *disable* the
 motherboard RAID controller and use native Linux software RAID.

The only caveat I can think of is if you wanted to BOOT off of the raid 
configuration.  The BIOS wouldn't understand the Linux RAID implementation.

But for RAID 1, especially, you probably want a minimum of 3 drives.  A boot 
drive with Linux, and the other 2 RAIDed together for speed.  That way, the 
logic to handle the failure of one of the drives isn't on the drive that may 
have failed.

Of course, if it is the Linux drive that failed, you replace that (from 
backup?) and your data should all still be available.



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Re: [CentOS] RAID support in kernel?

2011-01-30 Thread Kevin K
Thanks.

I hadn't really looked in any of this for a few years since I used RAID to 
combine 2 smaller hard drives into one larger volume.  At work, I'm either just 
a user of a remote server that uses netapp filers for storage, or am running 
more disposable installs on lower end systems (with 1 hard drive) that can be 
wiped and reinstalled easily.
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Re: [CentOS] latest kernel - version question

2011-01-10 Thread Kevin K

On Jan 10, 2011, at 11:25 AM, Santi Saez wrote:

 El 09/01/2011 16:31, Robert Heller escribió:
 
 The kernel itself is optimized for the i686 processor.  It is possible
 to custom build a kernel for the i586, i486, or i386 if you really have
 a processor that old.
 
 What is the sense of optimize a kernel for i686 and then distribute most 
 of packages for i386?
 
 For example in CentOS-5:
 
 kernel-2.6.18-194.el5.i686.rpm
 php-5.1.6-27.el5.i386.rpm
 httpd-2.2.3-43.el5.centos.i386.rpm
 mysql-server-5.0.77-4.el5_4.2.i386.rpm
 

Most packages don't necessarily require the extra instructions in the 686.  
Routines like glibc, which are linked in at runtime, do get compiled for the 
686.

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Re: [CentOS] latest kernel - version question

2011-01-09 Thread Kevin K
 Don't forget AMD's K6 processors -- these are also i586 processors.
 
 I have an AMD K6 that won't boot Fedora 7 (or later) due to missing
 some bit of architecture (I forget specifics, sorry...). So I suspect
 it's not truly an i586 processor? (fwiw, It did boot and install Linux
 Mint 9, LXDE however.)
 
 I didn't know the difference 10 years ago when I bought it, though it
 had Win98 installed which was fine back then... Now it's barely
 adequate as a print server. 

My last attempt to run a later kernel on a 586 or older was with EL 3.  But if 
the system was rebuilt, it lost the updated native threads introduced in 3 (RH 
9).  The GLIBC apparently required a 686 or later to support it.
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Re: [CentOS] CENTOS 5.5 X86 continue get out of memory error?????

2010-11-24 Thread Kevin K

On Nov 24, 2010, at 6:27 PM, mcclnx mcc wrote:

 Thank you for answer.
 
 This server used to run under CENTOS 3.9 X86 and No problem.  Due to 
 application can not use CENTOS 3.9 we need upgrade to CENTOS 4 or 5.
 
 If I re-install it and use CENTOS 4.8 X86, will problem gone or not?

A few options.

You might test the program on a 64 bit OS.  The 64 bit version of CentOS should 
be able to run many 32 bit programs.  It would depend on dependencies in the 
program whether it would have issues or not.  In fact, other changes since 3.9 
may be more of an issue than the 64 bitness of the OS.

It is possible to limit the amount of RAM that the OS will recognize by passing 
options to the kernel in grub.

You also may be able to run a 32 bit version of the OS in virtualization under 
a 64 bit OS, leaving the rest of the RAM available for the main system.  2 
computers in 1.

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RE: [CentOS] centos 4.6 - 586 install - how to get that to a 486 level if possible

2008-06-21 Thread Kevin K
I tried RHEL 3 (I believe) on a Pentium class system, and that did not work
well.

For everything but the kernel, there was a 386 version available (glibc,
ssl, etc), so we recompiled the kernel for the 586.

Unfortunately, glibc, when you compile it for anything below a 686, did not
support NTPL threads, causing nothing but heartache.  Luckily, before we got
too far, we learned we didn't have to target the Pentium based computer
anymore.  I am happy we didn't have to validate everything still worked when
something as major as glibc is rebuilt (since I started looking whether it
was possible to rebuild glibc for 586 and NTPL).  Kernels are less risky,
since people rebuild them more frequently.

-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf
Of Johnny Hughes
Sent: Friday, June 20, 2008 8:49 PM
To: CentOS mailing list
Subject: Re: [CentOS] centos 4.6 - 586 install - how to get that to a 486
level if possible

Jerry Geis wrote:
 Is there a method to get a 586 (i586 text) install  to a 486 level?
 I am looking for information guidance on this.
 I have looked into using debian/386 which stinks in my opinion, 
 slackware doesnt quite have it either.
 
 So I am wishing/hoping there is a NOT TO painful way to get a 586 
 install to run on a 486 chip.
 

This would be almost impossible with centos.

The reason is that there are things that glibc will compile in that are not
i486 compatible

You would be much better off trying to do this with debian I think.

If it were possible, it would be by installing the i386 glibc, i386 openssl
and editing the kernel spec file and the config file.

You can try to change the processor type to i386 or i486 and see if it will
work ... however I do not think it is possible on other than
centos-3 to get an i386 compile.

 I have been searching but havent found anything useful. If anyone 
 knows what might need to be done I would appreciate it.
 



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