date:20130214

James B. Byrne wrote:
 On Wed, February 13, 2013 17:48, Bassem Sossan wrote:
 Hello

 I've changed from Ms Windows 2008 R2 to CentOS 6 recently, and
 there are many aspects to learn in relation to command line
 ( Bash scripting, package system managing, file system and so on )...

 I need to apply as much as I can of Network Infrastructure knowledge
 ( DNS, DHCP and Virtualization  ) concepts using CentOS 6
 GUI...

 I know that I must learn dealing with linux using command tools
 and that will come, but it has much more of time, so, Am I forced
 as a learner to follow command line tools before going to GUI or I
 can get a good knowledge and experience by implementing my skills
 on GUI  ?

 So sorry to pothering

There's already a lot of GUI built into every desktop. Have you looked at
them?
snip
 it.  The CLI of the underlying utilities is the final arbitrator of
 course and there 'man utility_name' is your ever-present friend
 (usually).  Nonetheless, the syntax of even the most common *nix
 commands is often arcane and similar utilities frequently have such
 subtly different variations that ones mind is sometimes driven to
 distraction with the inconsistencies.

I keep hearing this arcane - even the author of xkcd commented about not
remembering tar flags... and yet, 80%-90% of them are trivially obvious to
me - -r (or -R) for recursion, -f for file. For configuration, such as
firewalls, there's always copy an existing line and edit, then do a syntax
check.

 mark but then, I also spent decades as a programmer

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[CentOS] motherboard for cents 6.3

2013-02-14 Thread Jerry Geis

Seems like overnight every motherboard that worked with linux has 
DROPPED off
the face of the earth.

Every motherboard I looked at is using the realtek 8111 chipset and a 
northbridge
that is not supported.

Example: GIGABYTE GA-970A-DS3, does not work with linux
I tried disabling the onboard NIC and using a PCI-E intel card I always use
and that would not work either. The north or south bridge is messing 
with the network card.
The card asks for a PXE boot but after centos starts it can no longer 
find kickstart files, network
is messed up.

I was using Asus M5A88-M and they are no longer available.

Anyway - anyone have a suggestion for and AMD motherboard that works with
linux be great if it has onboard video (gaming is not needed), onboard 
network,
SATA nothing super special just working.

Thanks,

jerry
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[CentOS] Bind - built in root hints?

Over on the bind-us...@lists.isc.org list, I am in a discussion about 
building the named.zone file, as Centos 6.3 does not provide it.  It 
DOES provide a named.ca which is already old (wrt  records) compared 
to the named.zone provided by internic.

A few contributors have stated that now the hints are built into bind 
and you can see this with:

strings /usr/local/sbin/named | grep A.ROOT-SERVERS.NET

Well it looks like Centos has it at /usr/sbin/named and there are no 
such strings in there.  Oh, these hints come from lib/dns/rootns.c in 
the source code tree.

So are the hints built in here?


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Re: [CentOS] motherboard for cents 6.3

Jerry Geis wrote:
Seems like overnight every motherboard that worked with linux has
DROPPED off the face of the earth.

First I've heard of this. What kind are you looking at, for a workstation
at home?

Every motherboard I looked at is using the realtek 8111 chipset and a
northbridge that is not supported.

The 8111 isn't new. Check
http://www.realtek.com.tw/Downloads/downloadsView.aspx?Langid=1PNid=13PFid=5Level=5Conn=4DownTypeID=3GetDown=false

And I was under the impression northbridge is northbridge. Why, is it
something other than Ivy, Sandy, or whatever?

Example: GIGABYTE GA-970A-DS3, does not work with linux
I tried disabling the onboard NIC and using a PCI-E intel card I always
use and that would not work either. The north or south bridge is messing
with the network card.

The card asks for a PXE boot but after centos starts it can no longer
find kickstart files, network is messed up.

You actually do want to do a pxeboot? Sounds to me like the issue here is
that the kickstart needs to load a driver for the NIC, and isn't doing so.

What does the messages screen say (f,um, 4? 6?)

I was using Asus M5A88-M and they are no longer available.

Anyway - anyone have a suggestion for and AMD motherboard that works with
linux be great if it has onboard video (gaming is not needed), onboard
network, SATA nothing super special just working.

I'll tell you that it works on every hardware we've bought, including
fairly new Dell 720's with a Tesla add-on card - standard CentOS 6.3.

mark

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Re: [CentOS] motherboard for cents 6.3

2013-02-14 Thread Weiner John

Sorry to hear about the ASUS because that is what we have too.

Another board that works on our Linux cluster is  TYAN S4980G2NR Thunder 
n3600QE 

There are a series of Tyan boards that are based on AMD architecture.  Last 
time I looked there were still on the face of the earth.

John

   
On Feb 14, 2013, at 1:28 PM, Jerry Geis ge...@pagestation.com wrote:

 Seems like overnight every motherboard that worked with linux has 
 DROPPED off
 the face of the earth.
 
 Every motherboard I looked at is using the realtek 8111 chipset and a 
 northbridge
 that is not supported.
 
 Example: GIGABYTE GA-970A-DS3, does not work with linux
 I tried disabling the onboard NIC and using a PCI-E intel card I always use
 and that would not work either. The north or south bridge is messing 
 with the network card.
 The card asks for a PXE boot but after centos starts it can no longer 
 find kickstart files, network
 is messed up.
 
 I was using Asus M5A88-M and they are no longer available.
 
 Anyway - anyone have a suggestion for and AMD motherboard that works with
 linux be great if it has onboard video (gaming is not needed), onboard 
 network,
 SATA nothing super special just working.
 
 Thanks,
 
 jerry
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Re: [CentOS] motherboard for cents 6.3

m.r...@5-cent.us wrote:
 Jerry Geis wrote:
 Seems like overnight every motherboard that worked with linux has
 DROPPED off the face of the earth.
snip
 I'll tell you that it works on every hardware we've bought, including
 fairly new Dell 720's with a Tesla add-on card - standard CentOS 6.3.

Sorry, that's Intel. However, we've got some hot Penguin servers, with
Opteron 6274, 64-core, and they were supported out of the box on the
supermicro m/b Penguin builds with.

ON THE OTHER HAND, having dealt with them, there's *no* *way* I'd buy a
Supermicro board: their q/a,q/c is lousy.

   mark

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Re: [CentOS] I want an advice

On Thu, Feb 14, 2013 at 9:07 AM,  m.r...@5-cent.us wrote:
 
 I keep hearing this arcane - even the author of xkcd commented about not
 remembering tar flags... and yet, 80%-90% of them are trivially obvious to
 me - -r (or -R) for recursion, -f for file. For configuration, such as
 firewalls, there's always copy an existing line and edit, then do a syntax
 check.

The 'arcane' issue isn't so much per-process as it is knowing which
program does what and how or if they interact in a way that affects
your upper-level task.  For example, I don't think it is very obvious
what you have to do for common things like giving a dhcp address with
an associated dns name to a specific device.  Or maybe setting up a
group of users with some special file system access, samba shares, web
logins with group access for several different web apps, and an email
group address.  And as for tar flags, if you use it for backups, which
one will make your restored system bootable?

  mark but then, I also spent decades as a programmer

Then maybe it makes sense for you for each program needed above to not
do much in the way of integrating with the others.  From the
perspective of a user it can seem complicated.

-- 
   Les Mikesell
 lesmikes...@gmail.com
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Re: [CentOS] A question

2013-02-14 Thread David G . Miller

Les Mikesell lesmikesell@... writes:

 
 On Wed, Feb 13, 2013 at 9:13 AM, David G. Miller dave@... wrote:
 
  Red Hat Linux is ancient.
  SNIP
  I started with Red Hat Linux 5 in 1998.  Mind your manners when calling RHL 
  9
  ancient or I'll come over and hit you with my walker.
 
 In computer years, that's like a century ago.
 
SNIP
I guess that means the IBM and CDC mainframes I started out on in the '70s and
'80s were prehistoric.  Funny thing is that an application I helped write in the
early 1980s was still being used by the customer in the mid-1990s (long story
how I found out).  It had been ported from the original platform (IBM S/370) to
a SUN workstation and the customer still loved it.  Wouldn't surprise me if they
aren't still using it.  After all, they still fly B-52s that are even older.
 But real books don't have that 'search' box up at the top...
SNIP
Agree with one of the other responders about that's what the index is for.  One
of my tests for a book on the subject is to go to the index and see how easy
it is to find the answers to some of the questions I have that have moved me to
buy a book on the subject.

Cheers,
Dave




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Re: [CentOS] I want an advice

Les Mikesell wrote:
 On Thu, Feb 14, 2013 at 9:07 AM,  m.r...@5-cent.us wrote:
 
 I keep hearing this arcane - even the author of xkcd commented about
 not remembering tar flags... and yet, 80%-90% of them are trivially
obvious
 to me - -r (or -R) for recursion, -f for file. For configuration, such as
 firewalls, there's always copy an existing line and edit, then do a
 syntax check.

 The 'arcane' issue isn't so much per-process as it is knowing which
 program does what and how or if they interact in a way that affects
 your upper-level task.  For example, I don't think it is very obvious
 what you have to do for common things like giving a dhcp address with
 an associated dns name to a specific device.  Or maybe setting up a
 group of users with some special file system access, samba shares, web
 logins with group access for several different web apps, and an email

True - but that's getting into nontrivial tasks, if you're doing it for
more than your own machine at home. There are security issues, and
organization policies, etc.

 group address.  And as for tar flags, if you use it for backups, which
 one will make your restored system bootable?

grub-install? g

  mark but then, I also spent decades as a programmer

 Then maybe it makes sense for you for each program needed above to not
 do much in the way of integrating with the others.  From the
 perspective of a user it can seem complicated.

No. One of the reasons I really, *really* like all versions of *Nix is
that most programs *can* work together, through switches and filters.

But then, as you progress from novice to craftsman, one of the chief
things you need to do is learn what the tools are, and how to use them,
and how to use them at *least* as intended.

 mark

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Re: [CentOS] A question

David G. Miller wrote:
 Les Mikesell lesmikesell@... writes:
 On Wed, Feb 13, 2013 at 9:13 AM, David G. Miller dave@... wrote:
 
  Red Hat Linux is ancient.
  SNIP
  I started with Red Hat Linux 5 in 1998.  Mind your manners when
  calling RHL 9 ancient or I'll come over and hit you with my walker.

 In computer years, that's like a century ago.

 SNIP
 I guess that means the IBM and CDC mainframes I started out on in the '70s
 and '80s were prehistoric.  Funny thing is that an application I helped
write
 in the early 1980s was still being used by the customer in the mid-1990s
(long
 story how I found out).  It had been ported from the original platform (IBM

Yep. 370, timeshare, 4300's

 S/370) to a SUN workstation and the customer still loved it.  Wouldn't
 surprise me if they aren't still using it.  After all, they still fly
 B-52s that are even older.

 But real books don't have that 'search' box up at the top...
 SNIP
 Agree with one of the other responders about that's what the index is for.
  One of my tests for a book on the subject is to go to the index and
  see how easy it is to find the answers to some of the questions I have
 that have moved me to buy a book on the subject.

Reminds me of the *only* O'Reilly book I didn't like: I think it was
Larry's original book on Perl - the index was *dreadful*, couldn't find
anything.

 mark

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Re: [CentOS] I want an advice

2013-02-14 Thread Giles Coochey


On 14/02/2013 16:00, m.r...@5-cent.us wrote:

Les Mikesell wrote:

On Thu, Feb 14, 2013 at 9:07 AM,  m.r...@5-cent.us wrote:

I keep hearing this arcane - even the author of xkcd commented about
not remembering tar flags... and yet, 80%-90% of them are trivially

obvious

to me - -r (or -R) for recursion, -f for file. For configuration, such as
firewalls, there's always copy an existing line and edit, then do a
syntax check.

The 'arcane' issue isn't so much per-process as it is knowing which
program does what and how or if they interact in a way that affects
your upper-level task.  For example, I don't think it is very obvious
what you have to do for common things like giving a dhcp address with
an associated dns name to a specific device.  Or maybe setting up a
group of users with some special file system access, samba shares, web
logins with group access for several different web apps, and an email

True - but that's getting into nontrivial tasks, if you're doing it for
more than your own machine at home. There are security issues, and
organization policies, etc.



Windows lures us into a false sense of security anyway:

Under Windows you just run the security  policy program, click next, 
next, finish and 'hey' you're done, all secure


At least when you have to think about something you can get more real 
confidence that you've done it right!!


--
Regards,

Giles Coochey, CCNA, CCNAS
NetSecSpec Ltd
+44 (0) 7983 877438
http://www.coochey.net
http://www.netsecspec.co.uk
gi...@coochey.net


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Re: [CentOS] A question

On Thu, Feb 14, 2013 at 10:15 AM,  m.r...@5-cent.us wrote:

 But real books don't have that 'search' box up at the top...
 SNIP
 Agree with one of the other responders about that's what the index is for.
  One of my tests for a book on the subject is to go to the index and
  see how easy it is to find the answers to some of the questions I have
 that have moved me to buy a book on the subject.

If you know the right question ahead of time you probably really don't
need the book.

 Reminds me of the *only* O'Reilly book I didn't like: I think it was
 Larry's original book on Perl - the index was *dreadful*, couldn't find
 anything.

On the other hand, if you wrote a perl program following those
examples, it would almost certainly still run today, with the only
change it might need being to escape @ symbols that you had in
double-quoted strings. That's pretty rare.

-- 
   Les Mikesell
 lesmikes...@gmail.com
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Re: [CentOS] A question

Les Mikesell wrote:
 On Thu, Feb 14, 2013 at 10:15 AM,  m.r...@5-cent.us wrote:

 But real books don't have that 'search' box up at the top...
 SNIP
 Agree with one of the other responders about that's what the index is
 for. One of my tests for a book on the subject is to go to the index
and
  see how easy it is to find the answers to some of the questions I have
 that have moved me to buy a book on the subject.

 If you know the right question ahead of time you probably really don't
 need the book.

Not necessarily. Sometimes, you know *something* the book covers, but not
all, or not nearly all. You can look for answers to stuff you've had
trouble solving.

 Reminds me of the *only* O'Reilly book I didn't like: I think it was
 Larry's original book on Perl - the index was *dreadful*, couldn't find
 anything.

 On the other hand, if you wrote a perl program following those
 examples, it would almost certainly still run today, with the only
 change it might need being to escape @ symbols that you had in
 double-quoted strings. That's pretty rare.

Well, yes. And I can do the same with my favorite language of all, ANSI C.

Breaking a language, unless there's no other answer, is NOT something I
have any sympathy with, he says, remembering how ever sub-release of
python 10-12 years ago would break previous system scripts, or then
there's ruby now

   mark the fault, dear Brutus, is not in our language, but in our code

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Re: [CentOS] I want an advice

2013-02-14 Thread fred smith

On Wed, Feb 13, 2013 at 09:50:28PM -0500, Digimer wrote:
 On 02/13/2013 05:48 PM, Bassem Sossan wrote:
  Hello
 
  I've changed from Ms Windows 2008 R2 to CentOS 6 recently, and there are
  many aspects to learn in relation to command line ( Bash scripting, package
  system managing, file system and so on )...

there's a lengthy online document on scripting with BASH: 
http://tldp.org/LDP/abs/html/
or as a single PDF file:
http://www.tldp.org/LDP/abs/abs-guide.pdf

and there's a beginner's BASH guide here:

http://www.tldp.org/LDP/Bash-Beginners-Guide/html/Bash-Beginners-Guide.html
and another one here:

http://www.ibm.com/developerworks/aix/library/au-getstartedbash/index.html

and yet another:
http://tldp.org/HOWTO/Bash-Prog-Intro-HOWTO.html

and another:
https://en.wikibooks.org/wiki/Bash_Shell_Scripting

good luck!

Fred


-- 
 Fred Smith -- fre...@fcshome.stoneham.ma.us -
   I can do all things through Christ 
  who strengthens me.
-- Philippians 4:13 ---
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Re: [CentOS] A question

On Thu, Feb 14, 2013 at 10:49 AM,  m.r...@5-cent.us wrote:

 Reminds me of the *only* O'Reilly book I didn't like: I think it was
 Larry's original book on Perl - the index was *dreadful*, couldn't find
 anything.

 On the other hand, if you wrote a perl program following those
 examples, it would almost certainly still run today, with the only
 change it might need being to escape @ symbols that you had in
 double-quoted strings. That's pretty rare.

 Well, yes. And I can do the same with my favorite language of all, ANSI C.

Umm, yeah - now.  In 1987 when perl was released you'd have been using
KR C which needed some changes when compilers started demanding the
syntax from the ANSI changes.  Or worse, some compiler with it's own
unique syntax.

-- 
   Les Mikesell
 lesmikes...@gmail.com
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Re: [CentOS] motherboard for cents 6.3

2013-02-14 Thread b.j. mcclure

Have built two workstations in last few months using Gigabyte
GA-880GA-UD3H motherboards.  One Rev. 2101, the other Rev. 3001.  Both
DVD installs of 6.3 w/o a hitch.  Using software Raid 10 on both with
four sata III drives.  Zero issues known.

HTH.

B.J.

CentOS release 6.3 (Final) 

On Thu, 2013-02-14 at 10:28 -0500, Jerry Geis wrote:

 Seems like overnight every motherboard that worked with linux has 
 DROPPED off
 the face of the earth.
 
 Every motherboard I looked at is using the realtek 8111 chipset and a 
 northbridge
 that is not supported.
 
 Example: GIGABYTE GA-970A-DS3, does not work with linux
 I tried disabling the onboard NIC and using a PCI-E intel card I always use
 and that would not work either. The north or south bridge is messing 
 with the network card.
 The card asks for a PXE boot but after centos starts it can no longer 
 find kickstart files, network
 is messed up.
 
 I was using Asus M5A88-M and they are no longer available.
 
 Anyway - anyone have a suggestion for and AMD motherboard that works with
 linux be great if it has onboard video (gaming is not needed), onboard 
 network,
 SATA nothing super special just working.
 
 Thanks,
 
 jerry
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Re: [CentOS] OT: UPS battery vendor, cont'd

2013-02-14 Thread Warren Young

On 2/13/2013 06:12, mark wrote:
 Huh. No, I want to pay on the order of $12/individual battery,

Please don't misuse order.  It's a corruption of the scientific term 
order of magnitude[1][2] which, used correctly, means that the values 
you're comparing use the same factor of 10 in scientific notation.  If 
we take your claim literally, you'd be satisfied with any complete 
battery that cost less than $120 * 8 = $960.

(I will also come after you if you misuse literally. :) )

 $100 or so for the set of 8;

You've got one low-ball quote, and now you're demanding that everyone 
else meet it?  Sigh...

The way I see it is, you've also got a whole bunch of people offering 
the same thing for $20-30 per VRLA[3] unit.  That means either:

a) $20-30/VRLA is a good price and consequently you should be worrying 
about how others are managing to low-ball that; or

b) there's widespread price-fixing.

Given how many news stories you can find about misbehaving cheap 
batteries, I'd bet on option a).  Just because the label has the same 
voltage and amp-hour rating as what came out of the APC UPS, doesn't 
mean it's exactly the same thing.  Batteries are tricky.  Boeing and 
Tesla Motors are both in the news now because too few people really 
understand batteries.

If you're willing to open up the APC sled and replace the individual 
VRLAs directly, the cheapest *reputable* vendor I've found is Mouser. 
Their part # 632-GP1245 looks close, but don't take my word on that. 
I'm just eyeballing photos and springboarding off the McMaster 
dimensions; I have no direct experience on that particular swap.

Mouser wants $16.30 each of these in qty 10.  Just for reference, one of 
Mouser's direct competitors, DigiKey, wants about $25 for the same 
thing.  That put's the $22-26 McMaster quote you've tried to reject 
right in the same range.

I also don't see that you're accounting for return shipping and the cost 
of the sled.  If you buy the pack from APC, they ship you a complete, 
assembled battery pack, along with a reusable box and return shipping 
label.  You put the old one back in the box you got the new one in, and 
send it back for recycling.  That's worth something.

When you buy individual VRLAs, you have to account for your time opening 
up the sled, swapping VRLAs, and reassembling it all.  Then you add in 
your time to dispose of the spent VRLAs.  I'm sure you can find plenty 
of places locally that will take them, but I'll bet your salary and gas 
costs will wipe out your DIY savings.

You're probably not counting opportunity costs[4], either.

-
[1] https://en.wikipedia.org/wiki/On_the_order_of
[2] http://mathworld.wolfram.com/OrderofMagnitude.html
[3] https://en.wikipedia.org/wiki/VRLA
[4] https://en.wikipedia.org/wiki/Opportunity_cost
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Re: [CentOS] motherboard for cents 6.3

2013-02-14 Thread SilverTip257

On Thu, Feb 14, 2013 at 10:28 AM, Jerry Geis ge...@pagestation.com wrote:

 Seems like overnight every motherboard that worked with linux has
 DROPPED off
 the face of the earth.

 Every motherboard I looked at is using the realtek 8111 chipset and a
 northbridge
 that is not supported.


Most hardware I work on has Broadcom or Intel chipsets.
Intel is the way to go if you're buying new.
(Well except for the EEPROM bug caused by some equipment manufacturers [4],
which isn't Intel's fault per se.)

Looks like fun:  [0] [1] [2] [3]

Driver that is included in vanilla Linux kernel is actually a driver for a
different network adapter, but works with 8111E too. Sort of works. Realtek
made new official driver that fixes the problem, but disables the old
driver. Which could be a problem for you if you have RTL8169/8110 and
RTL8168/8. [2]


[0]
http://www.linuxquestions.org/questions/linux-networking-3/no-network-detected-realtek-8111-8168-issue-615047/
[1] http://forums.linuxmint.com/viewtopic.php?f=49t=80757
[2] http://www.twm-kd.com/linux/realtek-rtl81688111e-and-ubuntu-linux/
[3]
http://unixblogger.wordpress.com/2011/10/18/the-pain-of-an-realtek-rtl8111rtl8168-ethernet-card/
[4] http://blog.krisk.org/2013/02/packets-of-death-update.html


 Example: GIGABYTE GA-970A-DS3, does not work with linux
 I tried disabling the onboard NIC and using a PCI-E intel card I always use
 and that would not work either. The north or south bridge is messing
 with the network card.
 The card asks for a PXE boot but after centos starts it can no longer
 find kickstart files, network
 is messed up.

 I was using Asus M5A88-M and they are no longer available.

 Anyway - anyone have a suggestion for and AMD motherboard that works with
 linux be great if it has onboard video (gaming is not needed), onboard
 network,
 SATA nothing super special just working.

 Thanks,

 jerry
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-- 
---~~.~~---
Mike
//  SilverTip257  //
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Re: [CentOS] A question

On Thu, Feb 14, 2013 at 11:00 AM, Les Mikesell lesmikes...@gmail.com wrote:
 Reminds me of the *only* O'Reilly book I didn't like: I think it was
 Larry's original book on Perl - the index was *dreadful*, couldn't find
 anything.

 On the other hand, if you wrote a perl program following those
 examples, it would almost certainly still run today, with the only
 change it might need being to escape @ symbols that you had in
 double-quoted strings. That's pretty rare.

 Well, yes. And I can do the same with my favorite language of all, ANSI C.

 Umm, yeah - now.  In 1987 when perl was released you'd have been using
 KR C which needed some changes when compilers started demanding the
 syntax from the ANSI changes.  Or worse, some compiler with it's own
 unique syntax.

And I forgot my favorite issue with 'C':  a failing 'include' is
fatal.  So, even though the language is mostly portable you can't,
within the language, write code that will compile across systems that
provide different include files.  So you have to use some other less
portable preprocessing toolset to get your code to a point where the
compiler has a chance of accepting it - something that has turned into
one of the most arcane arts you are likely to ever see.

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Re: [CentOS] Bind - built in root hints?

2013-02-14 Thread Paul Heinlein


On Thu, 14 Feb 2013, Robert Moskowitz wrote:


Over on the bind-us...@lists.isc.org list, I am in a discussion about
building the named.zone file, as Centos 6.3 does not provide it.  It
DOES provide a named.ca which is already old (wrt  records) compared
to the named.zone provided by internic.

A few contributors have stated that now the hints are built into bind
and you can see this with:

strings /usr/local/sbin/named | grep A.ROOT-SERVERS.NET

Well it looks like Centos has it at /usr/sbin/named and there are no
such strings in there.  Oh, these hints come from lib/dns/rootns.c in
the source code tree.

So are the hints built in here?


See /var/named/named.ca (also visible in /var/named/chroot/var/named).

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Re: [CentOS] Bind - built in root hints?


On 02/14/2013 12:29 PM, Paul Heinlein wrote:
 On Thu, 14 Feb 2013, Robert Moskowitz wrote:

 Over on the bind-us...@lists.isc.org list, I am in a discussion about
 building the named.zone file, as Centos 6.3 does not provide it.  It
 DOES provide a named.ca which is already old (wrt  records) compared
 to the named.zone provided by internic.

 A few contributors have stated that now the hints are built into bind
 and you can see this with:

 strings /usr/local/sbin/named | grep A.ROOT-SERVERS.NET

 Well it looks like Centos has it at /usr/sbin/named and there are no
 such strings in there.  Oh, these hints come from lib/dns/rootns.c in
 the source code tree.

 So are the hints built in here?

 See /var/named/named.ca (also visible in /var/named/chroot/var/named).

Yes.  I know about that. But as I said, the discussion is that this is 
no longer needed as the hints are now built into bind if no explicit 
hint is provided.  I am asking if the above stub is included in the 
Redhat/Centos build.  It does not seem so.


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[CentOS] Installing SOGo on Centos 5

2013-02-14 Thread Nikolaos Milas

Hello,

I was following directions at:
http://www.sogo.nu/english/support/faq/article/how-to-install-sogo-and-sope-through-yum-1.html
to install SOGo on CentOS 5.9 and, noticing that among the dependencies 
is memcached and rpmforge includes a much more recent version than EPEL, 
I preferred rpmforge and therefore I set a higher priority for rpmforge 
repo (see below).

[Note: I guess I could have left out epel in the first place, because I 
saw that no package was used from there, yet I thought I should follow 
the directions at the above page, which claim that epel should be 
enabled, just in case.]

So I did:
 # yum --enablerepo=rpmforge,epel,rpmforge-extras,sogo-rhel5 install 
sogo sogo-devel sogo-debuginfo
where I have the following priorities set:

[base]
priority=1
enabled=1

[updates]
priority=1
enabled=1

[addons]
priority=1
enabled=1

[extras]
priority=5
enabled=1

[centosplus]
priority=6
gpgcheck=1
enabled=0

[contrib]
priority=15

[rpmforge]
priority = 2
enabled = 0

[rpmforge-extras]
priority = 2
enabled = 0

[epel]
priority=5
enabled=0

[sogo-rhel5]
enabled=0
priority=3

but I got:
...
perl-AnyEvent-5.340-1.el5.rfx.x86_64 from rpmforge-extras has depsolving 
problems
   -- Missing Dependency: perl(Net::SSLeay) = 1.33 is needed by 
package perl-AnyEvent-5.340-1.el5.rfx.x86_64 (rpmforge-extras)
Error: Missing Dependency: perl(Net::SSLeay) = 1.33 is needed by 
package perl-AnyEvent-5.340-1.el5.rfx.x86_64 (rpmforge-extras)

However, it seems an RPM is available at rpmforge-extras (and is  1.33):

# yum --enablerepo=rpmforge,rpmforge-extras,rpmforge-testing info 
perl-Net-SSLeay
...
Available Packages
Name   : perl-Net-SSLeay
Arch   : x86_64
Version: 1.36
Release: 1.el5.rfx
Size   : 334 k
Repo   : rpmforge-extras
Summary: Net-SSLeay module for perl
URL: http://search.cpan.org/dist/Net-SSLeay/
License: Artistic/GPL
Description: Net-SSLeay module for perl.

Why this package isn't being used during dep solving?

Any ideas? Am I doing something wrong?

Please advise.

Thanks,
Nick

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Re: [CentOS] Bind - built in root hints?


On 02/14/2013 12:47 PM, Reindl Harald wrote:

 Am 14.02.2013 18:37, schrieb Robert Moskowitz:
 On 02/14/2013 12:29 PM, Paul Heinlein wrote:
 On Thu, 14 Feb 2013, Robert Moskowitz wrote:

 Over on the bind-us...@lists.isc.org list, I am in a discussion about
 building the named.zone file, as Centos 6.3 does not provide it.  It
 DOES provide a named.ca which is already old (wrt  records) compared
 to the named.zone provided by internic.

 A few contributors have stated that now the hints are built into bind
 and you can see this with:

 strings /usr/local/sbin/named | grep A.ROOT-SERVERS.NET

 Well it looks like Centos has it at /usr/sbin/named and there are no
 such strings in there.  Oh, these hints come from lib/dns/rootns.c in
 the source code tree.

 So are the hints built in here?
 See /var/named/named.ca (also visible in /var/named/chroot/var/named).
 Yes.  I know about that. But as I said, the discussion is that this is
 no longer needed as the hints are now built into bind if no explicit
 hint is provided.  I am asking if the above stub is included in the
 Redhat/Centos build.  It does not seem so.
 and even if - how would this be updated without the need
 for a security fix since otherwise there are no updates
 in RHEL

I asked this on the bind-users list, as  records are slowly being 
added to each root, and got back:

No need to worry. They are only hints, and named uses them to get the 
current list of root name servers at startup. Even if they are 15 years 
out of date it will still work, because the root name servers do not 
change very often.

So take that with whatever size of salt grain you prefer.


 ftp://ftp.internic.net/domain/named.cache and update
 /var/named/chroot/var/named/named.ca with it is the
 way to go

What I am doing.  But so far something is not set right, as I am not 
getting responses back, but I think I know why and it is a grrr moment.

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Re: [CentOS] Bind - built in root hints?


On 02/14/2013 12:47 PM, Reindl Harald wrote:

 Am 14.02.2013 18:37, schrieb Robert Moskowitz:
 On 02/14/2013 12:29 PM, Paul Heinlein wrote:
 On Thu, 14 Feb 2013, Robert Moskowitz wrote:

 Over on the bind-us...@lists.isc.org list, I am in a discussion about
 building the named.zone file, as Centos 6.3 does not provide it.  It
 DOES provide a named.ca which is already old (wrt  records) compared
 to the named.zone provided by internic.

 A few contributors have stated that now the hints are built into bind
 and you can see this with:

 strings /usr/local/sbin/named | grep A.ROOT-SERVERS.NET

 Well it looks like Centos has it at /usr/sbin/named and there are no
 such strings in there.  Oh, these hints come from lib/dns/rootns.c in
 the source code tree.

 So are the hints built in here?
 See /var/named/named.ca (also visible in /var/named/chroot/var/named).
 Yes.  I know about that. But as I said, the discussion is that this is
 no longer needed as the hints are now built into bind if no explicit
 hint is provided.  I am asking if the above stub is included in the
 Redhat/Centos build.  It does not seem so.
 and even if - how would this be updated without the need
 for a security fix since otherwise there are no updates
 in RHEL

Oh, I have checked and eventhough we are stuck at ver 9.8.2, we are 
current on security patches per the alerts listed by isc.  So our 9.8.2 
is NOT quite 9.8.2


 ftp://ftp.internic.net/domain/named.cache and update
 /var/named/chroot/var/named/named.ca with it is the
 way to go


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[CentOS] Really changing the hostname

I need to change the host name on a test server, and in the past when I 
used hostname to change the hostname, it did not seem to change it 
everywhere.

I really don't want to do a rebuild just yet, but I have to feel 
confident that hostname is really changed (reboot is not too much of an 
issue).

What is the recommened practice?  Other than get it right the first time.


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Re: [CentOS] Really changing the hostname

2013-02-14 Thread Digimer

On 02/14/2013 01:11 PM, Robert Moskowitz wrote:
 I need to change the host name on a test server, and in the past when I
 used hostname to change the hostname, it did not seem to change it
 everywhere.

 I really don't want to do a rebuild just yet, but I have to feel
 confident that hostname is really changed (reboot is not too much of an
 issue).

 What is the recommened practice?  Other than get it right the first time.

To make the change permanent, edit /etc/ssyconfig/network and set the 
desired hostname after HOSTNAME=.

-- 
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Papers and Projects: https://alteeve.ca/w/
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Re: [CentOS] Really changing the hostname

2013-02-14 Thread Digimer

On 02/14/2013 01:13 PM, Digimer wrote:
 On 02/14/2013 01:11 PM, Robert Moskowitz wrote:
 I need to change the host name on a test server, and in the past when I
 used hostname to change the hostname, it did not seem to change it
 everywhere.

 I really don't want to do a rebuild just yet, but I have to feel
 confident that hostname is really changed (reboot is not too much of an
 issue).

 What is the recommened practice?  Other than get it right the first time.

 To make the change permanent, edit /etc/ssyconfig/network and set the
 desired hostname after HOSTNAME=.


Sorry, I typo'd that;

# cat /etc/sysconfig/network
NETWORKING=yes
HOSTNAME=your.new.hostname

-- 
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Re: [CentOS] Really changing the hostname

On Thu, Feb 14, 2013 at 12:15 PM, Digimer li...@alteeve.ca wrote:
 On 02/14/2013 01:13 PM, Digimer wrote:
 On 02/14/2013 01:11 PM, Robert Moskowitz wrote:
 I need to change the host name on a test server, and in the past when I
 used hostname to change the hostname, it did not seem to change it
 everywhere.

 I really don't want to do a rebuild just yet, but I have to feel
 confident that hostname is really changed (reboot is not too much of an
 issue).

 What is the recommened practice?  Other than get it right the first time.

 To make the change permanent, edit /etc/ssyconfig/network and set the
 desired hostname after HOSTNAME=.


 Sorry, I typo'd that;

 # cat /etc/sysconfig/network
 NETWORKING=yes
 HOSTNAME=your.new.hostname


This will get picked up on the next reboot.  You will have to use the
hostname command to make it take effect immediately, but some
applications only pick it up when they start so things like your login
prompt won't change until the next login.

-- 
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 lesmikes...@gmail.com
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Re: [CentOS] Really changing the hostname

2013-02-14 Thread Mike Burger

 On Thu, Feb 14, 2013 at 12:15 PM, Digimer li...@alteeve.ca wrote:
 On 02/14/2013 01:13 PM, Digimer wrote:
 On 02/14/2013 01:11 PM, Robert Moskowitz wrote:
 I need to change the host name on a test server, and in the past when
 I
 used hostname to change the hostname, it did not seem to change it
 everywhere.

 I really don't want to do a rebuild just yet, but I have to feel
 confident that hostname is really changed (reboot is not too much of
 an
 issue).

 What is the recommened practice?  Other than get it right the first
 time.

 To make the change permanent, edit /etc/ssyconfig/network and set the
 desired hostname after HOSTNAME=.


 Sorry, I typo'd that;

 # cat /etc/sysconfig/network
 NETWORKING=yes
 HOSTNAME=your.new.hostname


 This will get picked up on the next reboot.  You will have to use the
 hostname command to make it take effect immediately, but some
 applications only pick it up when they start so things like your login
 prompt won't change until the next login.

One could also run service network restart to have it take a more
immediate effect.

The disconnect from the network is momentarily, and one's session isn't
even severed.
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Re: [CentOS] Error: headerRead failed: hdr blob

2013-02-14 Thread Anumeha Prasad

It's working fine now. There was some issue with the way I packaged the OS
updates rpms.

Thanks

On Mon, Feb 11, 2013 at 6:51 PM, Karanbir Singh kbsi...@centos.org wrote:

 On 02/11/2013 12:35 PM, Anumeha Prasad wrote:
  error: bind-libs-9.3.6-20.P1.el5_8.6.x86_64.rpm: headerRead failed: hdr
  blob(48062): BAD, read returned 515
  error: bind-libs-9.3.6-20.P1.el5_8.6.x86_64.rpm cannot be installed
 

 This could be a big problem potentially: rerun the samw command, but add
 a -d7 to yum's command line and put the results at
 http://pastebin.centos.org and post the url to that here to the list.

 - KB

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Re: [CentOS] Really changing the hostname

2013-02-14 Thread Brian Mathis

On Thu, Feb 14, 2013 at 1:15 PM, Digimer li...@alteeve.ca wrote:
 On 02/14/2013 01:13 PM, Digimer wrote:
 On 02/14/2013 01:11 PM, Robert Moskowitz wrote:
 I need to change the host name on a test server, and in the past when I
 used hostname to change the hostname, it did not seem to change it
 everywhere.

 I really don't want to do a rebuild just yet, but I have to feel
 confident that hostname is really changed (reboot is not too much of an
 issue).

 What is the recommened practice?  Other than get it right the first time.

 To make the change permanent, edit /etc/ssyconfig/network and set the
 desired hostname after HOSTNAME=.


 Sorry, I typo'd that;

 # cat /etc/sysconfig/network
 NETWORKING=yes
 HOSTNAME=your.new.hostname

 --
 Digimer



You also probably want to update /etc/hosts, though it strictly does
not itself set the hostname for the machine.


❧ Brian Mathis
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Re: [CentOS] A question

Les Mikesell wrote:
 On Thu, Feb 14, 2013 at 10:49 AM,  m.r...@5-cent.us wrote:

 Reminds me of the *only* O'Reilly book I didn't like: I think it was
 Larry's original book on Perl - the index was *dreadful*, couldn't
 find anything.

 On the other hand, if you wrote a perl program following those
 examples, it would almost certainly still run today, with the only
 change it might need being to escape @ symbols that you had in
 double-quoted strings. That's pretty rare.

 Well, yes. And I can do the same with my favorite language of all, ANSI
 C.

 Umm, yeah - now.  In 1987 when perl was released you'd have been using
 KR C which needed some changes when compilers started demanding the
 syntax from the ANSI changes.  Or worse, some compiler with it's own
 unique syntax.

True... but in '87, I was still on mainframes, and using *GAG* DOS/VSE/SP
(and whatever letters have been added since). I didn't get to use C until
'89, and perl... no one had heard of it were I was working in TX until
about '92 or '93.

Yes, I did start with KR, and have my copy of the Bible (KR, ANSI
version). Syntax on languages shouldn't change, anyway

mark

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Re: [CentOS] OT: UPS battery vendor, cont'd

Warren Young wrote:
 On 2/13/2013 06:12, mark wrote:
 Huh. No, I want to pay on the order of $12/individual battery,

 Please don't misuse order.  It's a corruption of the scientific term
 order of magnitude[1][2] which, used correctly, means that the values
 you're comparing use the same factor of 10 in scientific notation.  If
 we take your claim literally, you'd be satisfied with any complete
 battery that cost less than $120 * 8 = $960.

Now, this is serious nitpicking, and it also argues over common usage. But
if you *really* want to get into it, I could note that I want on the
order, base 2.

 (I will also come after you if you misuse literally. :) )

 $100 or so for the set of 8;

 You've got one low-ball quote, and now you're demanding that everyone
 else meet it?  Sigh...

I take it you haven't done a lot of purchasing, where alternatives were
considered? APC offers it at the highest price for their own UPSes. Many
other companies offer compatibles, and this kind of rate - the lower one -
is what I've been paying for over three years.

Actually, since of the three or four with the ballpark (go ahead, argue
*that*) of $100 for the set of 8, none offer GSA, I've checked with my
manager, and I'll just go ahead and get three quotes for open market
value.
snip
 Given how many news stories you can find about misbehaving cheap
 batteries, I'd bet on option a).  Just because the label has the same
 voltage and amp-hour rating as what came out of the APC UPS, doesn't
 mean it's exactly the same thing.  Batteries are tricky.  Boeing and
 Tesla Motors are both in the news now because too few people really
 understand batteries.

No. The only *real* issue is getting the vendor to understand that every
single battery manufacturer is lying, because they *haven't* tested them
on rackmount server UPSes, and yes, I don't care what the OEM says - and
I've spoken, personally, to two or three OEMs - they MUST be HR (high
rate) batteries; nothing else will make the UPSes happy.

The compatible batteries I've bought and put in the UPSes in '10 are only
*starting* to go, so three years (including '10, since most of them were
in the first half of the years) isn't bad, esp, when, with our wonderful
power that blinks at least once a day to the server rooms, they do get
hit.

 If you're willing to open up the APC sled and replace the individual
 VRLAs directly, the cheapest *reputable* vendor I've found is Mouser.
 Their part # 632-GP1245 looks close, but don't take my word on that.
 I'm just eyeballing photos and springboarding off the McMaster
 dimensions; I have no direct experience on that particular swap.

Oh, sorry if I wasn't clear: that's what I do, open the sled and replace
with the new set of eight individual batteries. Not a big deal.
snip
 When you buy individual VRLAs, you have to account for your time opening
 up the sled, swapping VRLAs, and reassembling it all.  Then you add in
 your time to dispose of the spent VRLAs.  I'm sure you can find plenty
 of places locally that will take them, but I'll bet your salary and gas
 costs will wipe out your DIY savings.

Nope. I bring the old batteries to my cube, and when I've got enough to
make it worth it, I call the folks in hazardous waste who explicitly take
care of recycling batteries, and they come get them.

 You're probably not counting opportunity costs[4], either.

And you're not looking at the bigger picture: I'm a sysadmin. We're not
overworked, though there's plenty to do. The Republicans in Congress
pretend to cut the budget; therefore, saving the US gov't, in the form of
my division, budget dollars, since I'm on a fixed rate, is cheaper than
trying to get more money out of Congress to save my time by shipping the
entire sled and recycling that.

 mark



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Re: [CentOS] OT: UPS battery vendor, cont'd

2013-02-14 Thread Tom Bishop

Mark did you look at atbatt.com, I have been looking recently and they are
ones that I have been looking to go with, not sure if they do GSA though...
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Re: [CentOS] OT: UPS battery vendor, cont'd

Tom Bishop wrote:
 Mark did you look at atbatt.com, I have been looking recently and they are
 ones that I have been looking to go with, not sure if they do GSA
 though...

Just looked at them. They're about half-way between full APC prices and
the discounters I've been looking at. They do have a page about
organizational purchases, but no GSA.

Thanks, though.

  mark

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Re: [CentOS] Really changing the hostname

Les Mikesell wrote:
 On Thu, Feb 14, 2013 at 12:15 PM, Digimer li...@alteeve.ca wrote:
 On 02/14/2013 01:13 PM, Digimer wrote:
 On 02/14/2013 01:11 PM, Robert Moskowitz wrote:
 I need to change the host name on a test server, and in the past when
I used hostname to change the hostname, it did not seem to change it
everywhere.

 I really don't want to do a rebuild just yet, but I have to feel
confident that hostname is really changed (reboot is not too much of
an issue).

 What is the recommened practice?  Other than get it right the first
time.

 To make the change permanent, edit /etc/ssyconfig/network and set the
desired hostname after HOSTNAME=.

 Sorry, I typo'd that;

 # cat /etc/sysconfig/network
 NETWORKING=yes
 HOSTNAME=your.new.hostname

 This will get picked up on the next reboot.  You will have to use the
hostname command to make it take effect immediately, but some
 applications only pick it up when they start so things like your login
prompt won't change until the next login.

Yep, what les says. If you don't reboot, things like syslog/rsyslog won't
change it in messages.

  mark



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Re: [CentOS] motherboard for cents 6.3

2013-02-14 Thread Johnny Hughes

On 02/14/2013 09:28 AM, Jerry Geis wrote:
 Seems like overnight every motherboard that worked with linux has 
 DROPPED off
 the face of the earth.

 Every motherboard I looked at is using the realtek 8111 chipset and a 
 northbridge
 that is not supported.

 Example: GIGABYTE GA-970A-DS3, does not work with linux
 I tried disabling the onboard NIC and using a PCI-E intel card I always use
 and that would not work either. The north or south bridge is messing 
 with the network card.
 The card asks for a PXE boot but after centos starts it can no longer 
 find kickstart files, network
 is messed up.

 I was using Asus M5A88-M and they are no longer available.

 Anyway - anyone have a suggestion for and AMD motherboard that works with
 linux be great if it has onboard video (gaming is not needed), onboard 
 network,
 SATA nothing super special just working.

I use the M5A99X EVO R2.0 board from ASUS ... I just built 2 machines
with it the other day and installed CentOS-6.3 on there.

I did not hook up sound, but network and sata work fine.  I also did not
use any of the hardware raid options, but there are 6 sata ports
(6GB/sec), 6 e-sata ports (6GB/sec), and USB 3.0 support.  It has AM3+
socket with support for a huge number of AMD CPUs from a single core
Sempron 100 series to the 8 core FX-8350.

The bios adjustments are amazing and there are several buttons on the
board itself if you get a bit too aggressive on the memory settings,
overclocking, etc.  This will do a self diagnostic and set things at
default for the Memory, CPU, and get you back to working settings.  You
can also flash the bios from a usb key while booted into the bios, so no
DOS booting to upgrade the firmware.

Needless to say ... I love these boards :)

They also seem to be very close to what you were already using
(M5A88-M), so any spare parts you have laying around should work (CPUs,
Memory, etc). 

It does NOT have built in Video though ... and it requires a pci-e 2.0
video card.  I had some GeForce cards on the shelf that would work.



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[CentOS] chrooted bind -- addition to rsyslog.conf

In /etc/sysconfig/named that gets installed along with bind-chroot there 
is a comment that basically says:

Don't forget to add $AddUnixListenSocket /var/named/chroot/dev/log 
line to your /etc/rsyslog.conf file.

All these little touches you need to find out about.  But is there any 
order in rsyslog.conf?  Do I just add this line to the end of it?


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[CentOS] Done - Re: Really changing the hostname

Thanks all.

Changed /etc/sysconfig/network and rebooted and all is well.  At least 
so far!

/etc/hosts did not have an entry for the host there.  Maybe because I 
have installed bind on this system.


On 02/14/2013 01:11 PM, Robert Moskowitz wrote:
 I need to change the host name on a test server, and in the past when I
 used hostname to change the hostname, it did not seem to change it
 everywhere.

 I really don't want to do a rebuild just yet, but I have to feel
 confident that hostname is really changed (reboot is not too much of an
 issue).

 What is the recommened practice?  Other than get it right the first time.


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[CentOS] Problem with installing DHCP

2013-02-14 Thread Bassem Sossan

I'm trying to install DHCP on CentOS 6 yum install dhcp, but the
installation doesn't complete...
I get a message that tell me that there is a conflict with file from
package dhclient...
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Re: [CentOS] chrooted bind -- addition to rsyslog.conf

2013-02-14 Thread Steven Tardy

On 02/14/2013 04:00 PM, Robert Moskowitz wrote:
 In /etc/sysconfig/named that gets installed along with bind-chroot there
 is a comment that basically says:

 Don't forget to add $AddUnixListenSocket /var/named/chroot/dev/log
 line to your /etc/rsyslog.conf file.

 All these little touches you need to find out about.  But is there any
 order in rsyslog.conf?  Do I just add this line to the end of it?

add your file in /etc/rsyslog.d/*whatever*.conf and restart rsyslog.
[user@dns01 ~]# cat /etc/rsyslog.d/MSU.named.chroot.conf
$AddUnixListenSocket /var/named/chroot/dev/log
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Re: [CentOS] Problem with installing DHCP

2013-02-14 Thread Paolo De Michele

the official documentation by redhat:
https://access.redhat.com/knowledge/docs/en-US/Red_Hat_Enterprise_Linux/6/html/Deployment_Guide/s1-dhcp-configuring-server.html

or

http://m.krizna.com/centos/install-configure-dhcp-server-centos-6/

I advise you to use the software dhcp and delete dhclient

let me know for any questions
 On Feb 14, 2013 11:18 PM, Bassem Sossan bayrnmun...@gmail.com wrote:

 I'm trying to install DHCP on CentOS 6 yum install dhcp, but the
 installation doesn't complete...
 I get a message that tell me that there is a conflict with file from
 package dhclient...
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Re: [CentOS] chrooted bind -- addition to rsyslog.conf


On 02/14/2013 05:58 PM, Steven Tardy wrote:
 On 02/14/2013 04:00 PM, Robert Moskowitz wrote:
 In /etc/sysconfig/named that gets installed along with bind-chroot there
 is a comment that basically says:

 Don't forget to add $AddUnixListenSocket /var/named/chroot/dev/log
 line to your /etc/rsyslog.conf file.

 All these little touches you need to find out about.  But is there any
 order in rsyslog.conf?  Do I just add this line to the end of it?
 add your file in /etc/rsyslog.d/*whatever*.conf and restart rsyslog.
 [user@dns01 ~]# cat /etc/rsyslog.d/MSU.named.chroot.conf
 $AddUnixListenSocket /var/named/chroot/dev/log

Got it. this makes more sense than what the comments tell you to do.

thanks.


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Re: [CentOS] OT: UPS battery vendor, cont'd

2013-02-14 Thread John R Pierce

On 2/14/2013 11:41 AM, m.r...@5-cent.us wrote:
 Tom Bishop wrote:
 Mark did you look at atbatt.com, I have been looking recently and they are
 ones that I have been looking to go with, not sure if they do GSA
 though...
 Just looked at them. They're about half-way between full APC prices and
 the discounters I've been looking at. They do have a page about
 organizational purchases, but no GSA.


do be sure you're comparing pears with pears and not apples with oranges.

serious UPS's are supplied with high discharge rate UPS certified VRLA 
batteries, which are NOT the same as the typical cheaper VRLA's you'll 
find at a discounter, intended for use as burglar alarm etc batteries.  
standard VRLA batteries are usually specified by their voltage and 
amp*hour rating for a 20 hour discharge rate, while UPS batteries use 
Watts at a 10 minute discharge rate.

example:  Panasonic LC-R127R2P is a standard VRLA 12V 7.2AH (at 20 hour 
rate) battery, thats rated at a 0.36 amp discharge rate. UP-VW1245P1 is 
the high discharge rate UPS version, rated at 268 watts (45 watts per 
cell) for 10 minutes, which is about 3.5 amp hours at a 22 amp discharge 
rate.  these two batteries are physically equivalent in size, weight.

yes, you can use the regular ones in your UPS and save a bundle.  I have 
a old(!) SmartUPS 2000 powering my home network, loaded with 4 x 
LC1220P's (12V 20AH).   My total load on this UPS is only like 500 
watts, so it will last for HOURS during extended power failures (winter 
storms, typically).   I wouldn't want to pull 2000VA out of this, however.


-- 
john r pierce  37N 122W
somewhere on the middle of the left coast

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[CentOS] bind-chroot rpm only builds chroot tree?

I just downloaded the bind-chroot rpm and looked into it with Archive 
manager (so I am lazy), and no files, just the chroot tree. I am 
assuming there is some script that Archive manager does not show, or I 
am just missing it, because the ROOTDIR= did get added to 
/etc/sysconfig/named (and the one in the bind rpm is without this line).

Just interesting that if you chroot, you are expected to know that 
everything needs to be placed there.  And they leave the /etc/named.conf 
there untouched.  Seems they should remove this or make it a symlink?

And what about /etc/rndc.key?  your chrooted bind uses the 
/var/named/chroot/etc/rndc.key and rndc uses the /etc/rndc.key, or so it 
seems, so your rndc.key is left unprotected outside of the chroot jail?  
Am I missing something in the rndc setup with chrooted bind?  I am not 
seeing any special instructions on this in the Redhat documentation.


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Re: [CentOS] bind-chroot rpm only builds chroot tree?


On 02/14/2013 08:47 PM, Robert Moskowitz wrote:
 I just downloaded the bind-chroot rpm and looked into it with Archive
 manager (so I am lazy), and no files, just the chroot tree. I am
 assuming there is some script that Archive manager does not show, or I
 am just missing it, because the ROOTDIR= did get added to
 /etc/sysconfig/named (and the one in the bind rpm is without this line).

 Just interesting that if you chroot, you are expected to know that
 everything needs to be placed there.  And they leave the /etc/named.conf
 there untouched.  Seems they should remove this or make it a symlink?

I just went back to the Centos 5.5 bind-chroot rpm (which I have on my 
local repo server) and it is the same.  Wow, that means I have been 
caring this stuff around further back than that?  But one thing is in 
5.5 it created /var/named/chroot/var/named/ data and slave which 6.3 are 
not.  And I am having permission problems with these two subdirectories 
and I am NOT seeing the problem.  Hope it is not a selinux issue.


 And what about /etc/rndc.key?  your chrooted bind uses the
 /var/named/chroot/etc/rndc.key and rndc uses the /etc/rndc.key, or so it
 seems, so your rndc.key is left unprotected outside of the chroot jail?
 Am I missing something in the rndc setup with chrooted bind?  I am not
 seeing any special instructions on this in the Redhat documentation.


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[CentOS] Selinux blocking bind access to named/data and slave directories

I was getting permission errors (seen in /var/log/messages) in accessing 
these two directories within my chroot tree.  I was pulling out what 
little hair I have, as the permissions were identical to those on my 
Centos 5.5 server.  So I switched selinux into permissive mode and now I 
have /var/named/chroot/var/named/data/named.run and my /named/slave/ 
stubs.

What is the selinux magic to allow bind to write here?


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Re: [CentOS] Selinux blocking bind access to named/data and slave directories

2013-02-14 Thread Frederico Madeira

Robert,

Send output of this two commands:

ps -eZ | grep named
ls -alZ into directorys that you want to allow bind to write


Att,

Frederico Madeira
fmade...@gmail.com
www.madeira.eng.br


2013/2/14 Robert Moskowitz r...@htt-consult.com

 I was getting permission errors (seen in /var/log/messages) in accessing
 these two directories within my chroot tree.  I was pulling out what
 little hair I have, as the permissions were identical to those on my
 Centos 5.5 server.  So I switched selinux into permissive mode and now I
 have /var/named/chroot/var/named/data/named.run and my /named/slave/
 stubs.

 What is the selinux magic to allow bind to write here?


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[CentOS] Boot failures

2013-02-14 Thread Paul Greene

Hello All,

I was having some issues with samba configuration and was going to 
remove the packages and reinstall again.

I think I might have rebooted before all of the package removal tasks 
were finished running and might have corrupted something.

The system successfully boots up to the grub menu, but after that the 
boot process stalls when the centos logo comes up. I can't boot into 
single user mode either.

I'd rather not have to re-install the OS. What, if any, options are 
available at this point?

CentOS version is 6.3.

Thanks in advance for any tips.

Sam
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Re: [CentOS] bind-chroot rpm only builds chroot tree?

2013-02-14 Thread Stuart Barkley

On Thu, 14 Feb 2013 at 20:47 -, Robert Moskowitz wrote:

 I just downloaded the bind-chroot rpm and looked into it with
 Archive manager (so I am lazy), and no files, just the chroot tree.
 I am assuming there is some script that Archive manager does not
 show, or I am just missing it, because the ROOTDIR= did get added to
 /etc/sysconfig/named (and the one in the bind rpm is without this
 line).

 Just interesting that if you chroot, you are expected to know that
 everything needs to be placed there.  And they leave the
 /etc/named.conf there untouched.  Seems they should remove this or
 make it a symlink?

 And what about /etc/rndc.key?  your chrooted bind uses the
 /var/named/chroot/etc/rndc.key and rndc uses the /etc/rndc.key, or
 so it seems, so your rndc.key is left unprotected outside of the
 chroot jail?  Am I missing something in the rndc setup with chrooted
 bind?  I am not seeing any special instructions on this in the
 Redhat documentation.

It has been quite a while, but I think there might be some stuff in
the main bind package which makes chroot work right when bind-chroot
is installed.  Did you look at what that package installs?
-- 
I've never been lost; I was once bewildered for three days, but never lost!
--  Daniel Boone
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Re: [CentOS] Selinux blocking bind access to named/data and slave directories

2013-02-14 Thread Peter Brady

On 14/02/13 7:23 PM, Robert Moskowitz wrote:
 I was getting permission errors (seen in /var/log/messages) in accessing 
 these two directories within my chroot tree.  I was pulling out what 
 little hair I have, as the permissions were identical to those on my 
 Centos 5.5 server.  So I switched selinux into permissive mode and now I 
 have /var/named/chroot/var/named/data/named.run and my /named/slave/ 
 stubs.
 
 What is the selinux magic to allow bind to write here?

Hi,

This may start a debate but it is my understanding that RH recommends to
not use chroot jails with bind as selinux is more secure.  For some
additional information see the following extract from the BIND 9 FAQ:

https://scs.senecac.on.ca/~raymond.chan/nad810/0701/SELinux-DNS.html

Right now I can't locate this on the new ISC website though.  There is
also an selinux section in the named(8) manual page, for example:

http://linux.die.net/man/8/named

which states pretty much the same.

If you wish to stay with chroot then the key is probably to install the
bind-chroot package and ensure that the ROOTDIR variable is set
correctly in:

/etc/sysconfig/named

For what its worth I'm running a number of master/slave DNS servers
under selinux no problems.  Any updates on the master propagates happily
to the slaves.  Mind you these are low traffic DNS servers that sit
behind a firewall.

Cheers
-pete

-- 
Peter Brady
Email: pdbr...@ans.com.au
Skype: pbrady77



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Re: [CentOS] Questions about software RAID, LVM.

2013-02-14 Thread Ted Miller

On 02/04/2013 06:40 PM, Robert Heller wrote:
 I am planning to increase the disk space on my desktop system.  It is
 running CentOS 5.9 w/XEN.  I have two 160Gig 2.5 laptop (2.5) SATA drives
 in two slots of a 4-slot hot swap bay configured like this:

 Disk /dev/sda: 160.0 GB, 160041885696 bytes
 255 heads, 63 sectors/track, 19457 cylinders
 Units = cylinders of 16065 * 512 = 8225280 bytes

 Device Boot  Start End  Blocks   Id  System
 /dev/sda1   *   1 125 1004031   fd  Linux raid autodetect
 /dev/sda2 126   19457   155284290   fd  Linux raid autodetect

 Disk /dev/sdb: 160.0 GB, 160041885696 bytes
 255 heads, 63 sectors/track, 19457 cylinders
 Units = cylinders of 16065 * 512 = 8225280 bytes

 Device Boot  Start End  Blocks   Id  System
 /dev/sdb1   *   1 125 1004031   fd  Linux raid autodetect
 /dev/sdb2 126   19457   155284290   fd  Linux raid autodetect

 sauron.deepsoft.com% cat /proc/mdstat
 Personalities : [raid1]
 md0 : active raid1 sdb1[1] sda1[0]
1003904 blocks [2/2] [UU]

 md1 : active raid1 sdb2[1] sda2[0]
155284224 blocks [2/2] [UU]

 unused devices:none

 That is I have two RAID1 arrays: a small (1Gig) one mounted as /boot
 and a larger 148Gig one that is a LVM Volume Group (which contains a
 pile of file systems, some for DOM0 and some that are for other VMs).
 What I plan on doing is getting a pair of 320Gig 2.5 (laptop) SATA
 disks and fail over the existing disks to this new pair.  I believe I
 can then 'grow' the second RAID array to be like ~300Gig.  My question
 is: what happens to the LVM Volume Group?  Will it grow when the RAID
 array grows?

Not on its own, but you can grow it.  I believe the recommended way to do 
the LVM volume is to
partition new drive as type fd
install new PV on new partition (will be new, larger size)
make new PV part of old volume group
migrate all volumes on old PV onto new PV
remove old PV from volume group

You have to do this separately for each drive, but it isn't very hard.  Of 
course your boot partition will have to be handled separately.


 Or should I leave /dev/md1 its current size and create a
 new RAID array and add this as a second PV and grow the Volume Group
 that way?

That is a solution to a different problem.  You would end up with a VG of 
about 450 GB total.  If that is what you want to do, that works too.

 The documentation is not clear as to what happens -- the VG
 is marked 'resisable'.

 sauron.deepsoft.com% sudo pvdisplay
--- Physical volume ---
PV Name   /dev/md1
VG Name   sauron
PV Size   148.09 GB / not usable 768.00 KB
Allocatable   yes
PE Size (KByte)   4096
Total PE  37911
Free PE   204
Allocated PE  37707
PV UUID   ttB15B-3eWx-4ioj-TUvm-lAPM-z9rD-Prumee

 sauron.deepsoft.com% sudo vgdisplay
--- Volume group ---
VG Name   sauron
System ID
Formatlvm2
Metadata Areas1
Metadata Sequence No  65
VG Access read/write
VG Status resizable
MAX LV0
Cur LV17
Open LV   12
Max PV0
Cur PV1
Act PV1
VG Size   148.09 GB
PE Size   4.00 MB
Total PE  37911
Alloc PE / Size   37707 / 147.29 GB
Free  PE / Size   204 / 816.00 MB
VG UUID   qG8gCf-3vou-7dp2-Ar0B-p8jz-eXZF-3vOONr

Doesn't look like anyone answered your question, so I'll tell you that the 
answer is Yes.

Ted Miller


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Re: [CentOS] Selinux blocking bind access to named/data and slave directories