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debian-user-digest Digest V2007 #2079

From: <debian-user-digest-request(at)lists.debian.org>
Date: Wed Aug 01 2007 - 13:09:22 EDT


Content-Type: text/plain

debian-user-digest Digest Volume 2007 : Issue 2079

Today's Topics: 

  Re: how to set network io priority f  [ Douglas Allan Tutty  ]
  Re: Compile Question                  [ Andrew Sackville-West  ]
  Re: Compile Question                  [ Brad Rogers  ]
  Re: Udev. Problems with ordering har  [ Douglas Allan Tutty 
  Re: how to set network io priority f  [ Douglas Allan Tutty <dtutty@porchli ]
  Re: nfs problem while internet acces  [ Stephane Durieux <durieux42@yahoo.f ]



Date: Wed, 1 Aug 2007 10:34:13 -0400


From: Douglas Allan Tutty <dtutty@porchlight.ca>
To: debian-user@lists.debian.org


Subject: Re: how to set network io priority for a process?

Message-ID: <20070801143413.GA9405@titan>
Content-Type: text/plain; charset=us-ascii
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On Wed, Aug 01, 2007 at 11:08:06AM -0300, Henrique de Moraes Holschuh wrote:

> On Sun, 29 Jul 2007, Douglas Allan Tutty wrote:
> > What we need is a multi-protocol proxy server that does proper
> > throttling of download requests.
> 
> Squid delay pools?  Will work for http and ftp.

But not rsync, which I use whenever I can for large downloads due to
errors creeping in for some reason over my noisy phone line and freqent
line drops (and susequent redials by pppd).  



Such a multi-protocol proxy server doesn't need to do any caching, it
just needs to put a variable delay on the outgoing ACKs that trigger
the next download block on ftp and rsync protocols, variable on whether
there's an active http connection.


Do you need help?X

Doug.



Date: Wed, 1 Aug 2007 16:02:01 +0100


From: Brad Rogers <brad@fineby.me.uk>


To: debian-user@lists.debian.org


Subject: Re: Compile Question


Message-ID: <20070801160201.2cc9ca53@abydos.stargate.org.uk>
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On Wed, 1 Aug 2007 14:40:13 +0000 (UTC)


Hendrik Boom <hendrik@topoi.pooq.com> wrote:



Hello Hendrik,


> My son uses the gentoo distribution, and he loves it.  Since all

I occasionally look at Gentoo, with a slightly green eye.  I've never
quite mustered the courage to dive in, though.


Do you need more help?X
> He gets an extremely up-to-date system (I gather it's usually more
> up-to-date than sid).  It is a reportable bug if the gentoo package is

And that too, could be a problem for me;  Occasionally, Debian Sid gets
"broken" and I wouldn't always know enough to be able to sort it out.
Especially if the problem meant I couldn't get on the 'net, because
with only the one machine available to me, I'd be completely unable to
seek assistance.


> It took all night and several extra gigabytes of temporary storage to
> install OpenOffice, though.

That's annoy my missus no end.  She thinks my machine is on too long,
as it is.


> By the way, I use etch and try hard not to install anything that
> doesn't arrive as a Debian package.

I use Testing, and mostly use .deb packages, as I said.  TBH, the ones
I do compile, I could probably get away with not doing so.  It's just
that these few I like to be fairly up to date on.


> up-to-date-ness, and having troubles. Xorg didn't autoconfigure
> properly.

Which would be a killer for me.


Can we help you?X

--=20


 Regards  _

         / )           "The blindingly obvious is
        / _)rad        never immediately apparent"


When I say ugly, I don't mean rough looking, I mean hideous
Ugly - The Stranglers



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Date: Wed, 1 Aug 2007 08:20:52 -0700


From: Andrew Sackville-West <andrew@farwestbilliards.com>
To: debian-user@lists.debian.org


Subject: Re: Compile Question


Message-ID: <20070801152052.GC14415@localhost.localdomain>
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Can't find what you're looking for?X

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On Wed, Aug 01, 2007 at 04:02:01PM +0100, Brad Rogers wrote:

> On Wed, 1 Aug 2007 14:40:13 +0000 (UTC)
> Hendrik Boom <hendrik@topoi.pooq.com> wrote:

=2E..

>=20


> > It took all night and several extra gigabytes of temporary storage to
> > install OpenOffice, though.
>=20


> That's annoy my missus no end.  She thinks my machine is on too long,
> as it is.


>=20



you turn your machine off? ...blink blink...



/me wanders away muttering and confused...




A



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Don't know where to look next?X


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Confused? Frustrated?X

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Date: Wed, 1 Aug 2007 20:27:07 +0530


From: Kumar Appaiah <akumar@iitm.ac.in>


To: debian-user@lists.debian.org


Subject: Re: Compile Question

Message-ID: <20070801145707.GA8282@localhost>
Content-Type: text/plain; charset=us-ascii
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On Wed, Aug 01, 2007 at 02:40:13PM +0000, Hendrik Boom wrote:

> up-to-date than sid).  It is a reportable bug if the gentoo package is
> not as up-to-date as the upstream developers' release.

Why isn't it in Debian? You can always file a minor or wishlist bug,
and normally, my experience has been that it is attended to.


> I'm installing gentoo on another partition,
> for the occasional moments when I really need aggressive up-to-date-ness,
> and having troubles. Xorg didn't autoconfigure properly.

I would like you to name a few packages which are not as up to date in
sid. Of course, there could very well be a reason, such as inactive
maintainer etc., but that should be reported to the BTS, IMO.



Comments?


Call Pantek today for Open Source Technical Support at 1-877-546-8934 - 24/7/365X

Thanks.



Kumar

-- 
Kumar Appaiah,
458, Jamuna Hostel,
Indian Institute of Technology Madras,
Chennai - 600 036


Date: Wed, 1 Aug 2007 16:25:20 +0100
From: Brad Rogers <brad@fineby.me.uk>
To: debian-user@lists.debian.org
Subject: Re: Compile Question
Message-ID: <20070801162520.78c4fc7d@abydos.stargate.org.uk>
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On Wed, 1 Aug 2007 08:20:52 -0700
Andrew Sackville-West <andrew@farwestbilliards.com> wrote:

Hello Andrew,


> you turn your machine off? ...blink blink...
> /me wanders away muttering and confused...


:-)

Sometimes, I just have to bend to TOBAC's wishes.

--=20
 Regards  _
         / )           "The blindingly obvious is
        / _)rad        never immediately apparent"

It's your life so go your own way
Questions And Answers - Sham 69

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Date: Wed, 1 Aug 2007 11:34:27 -0400
From: Douglas Allan Tutty <dtutty@porchlight.ca>
To: debian-user@lists.debian.org
Subject: Re: Udev. Problems with ordering hardware using /dev/video
Message-ID: <20070801153427.GB9405@titan>
Content-Type: text/plain; charset=us-ascii
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On Tue, Jul 31, 2007 at 11:21:27PM +0200, Florian Kulzer wrote:
 

> This flip-flopping is, AFAIK, more the fault of the newer kernel then
> the fault of udev. If the kernel would always load the modules in the
> same order then udev would probably assign the device nodes in a
> consistent manner.


I disagree.  Udev is responsible for creating device nodes.  It should
remember what devices nodes it has made in the past for different
devices, and recreate them the same way in the futuer.  Yes, this could
mean that if a webcam is video0 and a TV card is video1 that if the
webcam is not connected there will be no video0, but that would be fine.
Over the life of a box, I could see that there may be videos starting
with video20.  The only problem with this is that we enumerate drives with
letters instead of numbers.

This whole udev mess, and devfs before it, was to address the rampant
growth in device nodes/names.  It seems to have brought with it a whole
slew of its own problems.  

Doug.



Date: Wed, 1 Aug 2007 11:41:24 -0400
From: Douglas Allan Tutty <dtutty@porchlight.ca>
To: debian-user@lists.debian.org
Subject: Re: ntfs mount errors
Message-ID: <20070801154124.GC9405@titan>
Content-Type: text/plain; charset=us-ascii
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On Wed, Aug 01, 2007 at 04:49:04AM +0200, pinniped wrote:

> 
> (quote)
> I still have the problem. ie. The windoze partition is
> mounted automatically fine, but I can only cd to it if I am root.
> (end quote)
> 
> Do:
> man mount
> 
> Look at the 'Mount options for ntfs'. All your mysteries are explained 
> there - for example:
> 
> "... By default, the files are owned by root and not readable by somebody 
> else."
> 
> So you need to set the uid/gid and umask. You really want 'root' to be the 
> owner anyway so I guess you only want to change the gid to the 'disk' group 
> and make sure you have a sensible umask.


Be careful there, members of the 'disk' group can do nasty things on
your debian box too.  Perhaps create a new group who can access the
windows partition, put those users into the group, then use the gid=
parameter in fstab.  However, this doesn't affect the uid.  I can't test
this further since I haven't run windows since 3.1 and never played with
ntfs.

Doug.



Date: Wed, 1 Aug 2007 08:57:13 -0700
From: Andrew Sackville-West <andrew@farwestbilliards.com>
To: debian-user@lists.debian.org
Subject: Re: nfs problem while internet access broken
Message-ID: <20070801155712.GA32121@localhost.localdomain>
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On Wed, Aug 01, 2007 at 05:51:40PM +0200, Stephane Durieux wrote:

> Hello=20

>=20

> I encounter a problem whith my nfs stations.
> If the server has not access to internet, they cannot
> mount their directories !


in what way is network access broken?=20

>=20

> I have checked /etc/fstab
> nfs server is referenced by is ip

>=20

> /etc/nsswitch.conf
> files hosts dns nis

>=20

> /etc/host.conf=20
> order hosts, bind, nis


none of these matter if you have no network connection. If the local
machine cannot access any network then there is no way to mount nfs
shares.=20

what is the output of=20

/sbin/ifconfig

A

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Date: Wed, 1 Aug 2007 08:59:42 -0700
From: Andrew Sackville-West <andrew@farwestbilliards.com>
To: debian-user@lists.debian.org
Subject: Re: Compile Question
Message-ID: <20070801155941.GB32121@localhost.localdomain>
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On Wed, Aug 01, 2007 at 04:25:20PM +0100, Brad Rogers wrote:

> On Wed, 1 Aug 2007 08:20:52 -0700
> Andrew Sackville-West <andrew@farwestbilliards.com> wrote:

>=20

> Hello Andrew,

>=20

> > you turn your machine off? ...blink blink...
> > /me wanders away muttering and confused...

>=20

> :-)

>=20

> Sometimes, I just have to bend to TOBAC's wishes.


TOBAC?

A

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Date: Wed, 1 Aug 2007 18:47:04 +0300
From: Alexandar Angelov <sasho.angelov@gmail.com>
To: debian-user@lists.debian.org
Subject: Re: dpkg purge problem
Message-Id: <200708011847.05893.sasho.angelov@gmail.com>
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On Wednesday 01 August 2007, Bob Proulx wrote:

/boot/grub/menu.lst is not corrupted


> After fixing and running update-grub inspect the file.  If update-grub
> runs without hanging then you should be able to purge the package.

>

> If all else fails and a package simply will not pass the prerm or
> postrm scripts then a reach-into-the-guts of the system approach is to
> edit the /var/lib/dpkg/info/linux-image-2.6.14-2-k7.prerm and/or
> /var/lib/dpkg/info/linux-image-2.6.14-2-k7.postrm files and hack them
> to exit(0); so as to avoid the error.  At that point dpkg will succeed
> without running the script.  But it won't have run the script either
> and so that problem would need to be dealt with but some broken
> packages have required this.


Can I get postrm script form other linux-image and change only 
my $version      to be      = "2.6.14-2-k7";


Do you need help?X

Date: Wed, 1 Aug 2007 13:03:52 -0300
From: Henrique de Moraes Holschuh <hmh@debian.org>
To: debian-user@lists.debian.org
Subject: Re: how to set network io priority for a process?
Message-ID: <20070801160352.GM23111@khazad-dum.debian.net>
Content-Type: text/plain; charset=us-ascii
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On Wed, 01 Aug 2007, Douglas Allan Tutty wrote:

> But not rsync, which I use whenever I can for large downloads due to
> errors creeping in for some reason over my noisy phone line and freqent
> line drops (and susequent redials by pppd).  


Why do you allow for damaged packets at all?

I used analog async ITU-T V42 modems for a *long* time (fortunately, I was
able to move away before V9x hit the market).  You really want an error-free
channel without compression for regular Internet over PPP domestic use, and
any modem still on the market should be able to deliver that to you just
fine.  Just configure it for error correction without compression, and have
a proper error-free short and well-shielded serial connection to it if it is
an external modem.


> Such a multi-protocol proxy server doesn't need to do any caching, it
> just needs to put a variable delay on the outgoing ACKs that trigger
> the next download block on ftp and rsync protocols, variable on whether
> there's an active http connection.


At that point, it is easier to just configure the kernel to do what you want
re. QoS, shaping and policing.

-- 
  "One disk to rule them all, One disk to find them. One disk to bring
  them all and in the darkness grind them. In the Land of Redmond
  where the shadows lie." -- The Silicon Valley Tarot
  Henrique Holschuh



Date: Wed, 1 Aug 2007 17:51:40 +0200 (CEST)
From: Stephane Durieux <durieux42@yahoo.fr>
To: debian-user@lists.debian.org
Subject: nfs problem while internet access broken
Message-ID: <348694.68230.qm@web27811.mail.ukl.yahoo.com>
Content-Type: text/plain; charset=iso-8859-1
Content-Transfer-Encoding: quoted-printable

Hello=20

I encounter a problem whith my nfs stations.
If the server has not access to internet, they cannot
mount their directories !

I have checked /etc/fstab
nfs server is referenced by is ip

/etc/nsswitch.conf
files hosts dns nis

/etc/host.conf=20
order hosts, bind, nis

(I would like to know the difference between the two
lasts)

I ve heard it can be a reverse resolution problem.=20
Can someone explain me it ?=20
What is the file involved in reverse resolution
locally ?

Thanks for reply


      ___________________________________________________________________=
__________=20
Ne gardez plus qu'une seule adresse mail ! Copiez vos mails vers Yahoo! M=
ail=20



Date: Wed, 1 Aug 2007 11:58:59 -0400
From: Douglas Allan Tutty <dtutty@porchlight.ca>
To: debian-user@lists.debian.org
Subject: Re: Swap configuration for 16GB of RAM, 8 cores
Message-ID: <20070801155859.GD9405@titan>
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline

On Tue, Jul 31, 2007 at 08:18:09PM -0000, agenkin@gmail.com wrote:

> I am installing two servers, each with 16GB of RAM, two quad-core Xeon
> processors, and a SATA hard drive.  The machines will be compute
> servers, meaning lots of concurrently logged in users, each running
> an assortment of jobs, and various long-running processes.  The jobs
> will be
> vastly dissimilar with regards to using the memory, disk, and CPU, and
> to
> their run time, so the configuration should be generic, general
> purpose.
> 
> What are the current best practices with regards to swap partitions?
> Is it
> better to create one big, or several smaller swap partitions?  Is the
> rule
> of thumb still RAM*2 for the total size?
> 
> We are running Debian 4.0/Etch with the stock -i686-bigmem kernel.
> 


Try this:

Use LVM for everything.  Actually, grub may or may not work on LVM so
put a regular partition (32 MB is more than ample) at the start (sda1)
and the remainder of the disk as sda2, as physical device for LVM.  Then
set up your usual separate 'partitions' under LVM.  To be generous, this
means a / of 512 MB, a /usr of 4 GB, a /var  of 6 GB plus whatever other
stuff you need for your /var, a separate /srv if needed of whatever
size, and /home.   Your choice of filesystem is another matter; it
should be growable and reliable, shrinking is less of an issue.  I use
JFS.

Then put swap on LVM as well.  Since you may need to increase swap size,
and I don't know how to do that with the swap online, you may want two
swap partitions so that one can be off line for a couple of minutes.  

Total swap size depends on how much VM gets assigned.  Since disk space
is cheap you may want to start with RAM*2 so you could start with two 16
GB swap partitions.

Note, however, that I run amd64.  I don't know what the swap size limits
are on a Xeon.

In combination with your swap partitions, you could use swapd to
dynamically make swap files.  You can monitor their existance and as
needed, take a swap partition off-line (swapd should then automatically
increase swap-file size), increase it with LVM, mkswap again on that
partition, then swapon that partition.

Good luck,

Doug.



Date: Wed, 1 Aug 2007 17:47:51 +0200
From: Florian Kulzer <florian.kulzer+debian@icfo.es>
To: debian-user@lists.debian.org
Subject: [OT] Re: Compile Question
Message-ID: <20070801154751.GA13032@localhost>
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline

On Wed, Aug 01, 2007 at 16:25:20 +0100, Brad Rogers wrote:

> On Wed, 1 Aug 2007 08:20:52 -0700 Andrew Sackville-West wrote:
> 
> Hello Andrew,
> 
> > you turn your machine off? ...blink blink...
> > /me wanders away muttering and confused...
> 
> :-)
> 
> Sometimes, I just have to bend to TOBAC's wishes.


The Town of Oyster Bay Arts Council makes you switch off your computer?
Now I am even more confused than Andrew...

(Don't you look at me like that, I did in fact consult google.)

-- 
Regards,            | http://users.icfo.es/Florian.Kulzer
          Florian   |



Date: Wed, 1 Aug 2007 12:11:08 -0400
From: Douglas Allan Tutty <dtutty@porchlight.ca>
To: debian-user@lists.debian.org
Cc: Kevin Mark <kevin.mark@verizon.net>
Subject: Re: IM on a home debian network
Message-ID: <20070801161108.GE9405@titan>
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline

On Tue, Jul 31, 2007 at 10:16:32PM -0400, Kevin Mark wrote:

> I just started to use screen and it has 'control-a ?' which given you
> the 'cheatsheet'. But you dont need all the commands to start using it.
> 
> I use:
> 'screen MYCOMMAND' to start a new screen session
> control-a " for menu-based session selection
> control-a n for 'go to next screen session'
> 'screen -list' to list the sessions
> 
> there are many more, but it is easy to try and then ask here for more
> advanced options.


Yea, I just tried it again and it only took me 20 seconds to hit
something (wrong key?) and its frozen that vt, nothing works.  I tried
killing its process and it remained frozen.  Luckily, I had ssh'd in to
the box so I could kill the ssh session from the originating box.

I know, the GNU folks are in love with Ctrl-* * commands (witness info)
but why they can't give a screen like in minicom with drop-down menus or
something...

Doug.



Date: Wed, 1 Aug 2007 13:41:56 -0300
From: Henrique de Moraes Holschuh <hmh@debian.org>
To: debian-user@lists.debian.org
Subject: Re: how to set network io priority for a process?
Message-ID: <20070801164156.GP23111@khazad-dum.debian.net>
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline

On Wed, 01 Aug 2007, Douglas Allan Tutty wrote:

> > I used analog async ITU-T V42 modems for a *long* time (fortunately, I was
> > able to move away before V9x hit the market).  You really want an error-free
> > channel without compression for regular Internet over PPP domestic use, and
> > any modem still on the market should be able to deliver that to you just
> > fine.  Just configure it for error correction without compression, and have
> > a proper error-free short and well-shielded serial connection to it if it is
> > an external modem.
> 
> Its an external 3Com Courier modem, that's not the problem.  I don't


That's the very best async modem ever produced, AFAIK.  Especially if you
managed to get the latest firmware into it before 3com went to become
another useless outlet for stuff designed by others.


> know _where_ the errors happen, but the more times the download is
> interrupted the more frequently there are issues somewhere in the iso.


It is probably not being restarted properly, and some crap is left in the
file.  One way you can get rid of that problem is to truncate the file
throwing away the last 1MB of it or so, for example (assuming this is not
one of those "multiple connections per file" transfers, in which case the
bogosity might be anywhere in the file).

If you DO get data errors with a Courier in error-correcting mode, it means
your serial cabling or serial port is bad, or that the other side is sending
you bad data.

And TCP protects data end-to-end against damage, so it can't be corrupted
that anyway, come to think of it.


> It has never been a problem when downloading packages via aptitude, even
> if I have to interrupt it.  However, under sarge, I found that gftp
> would die out and not resume properly, corrupting the file, and that
> sometimes wget will also corrupt the file.  


Try lftp.  I know of no better ftp client.  But it is command-line, which is
just as well: the transfer engine is well cared for, and not a secondary
thing to the GUI.


> For all I know, the errors are happening upstream of my ISP's modem.


Not on TCP connections.  If it is ftp transfers that are being damaged when
the line is teared down, it is because your ftp client is broken.

-- 
  "One disk to rule them all, One disk to find them. One disk to bring
  them all and in the darkness grind them. In the Land of Redmond
  where the shadows lie." -- The Silicon Valley Tarot
  Henrique Holschuh



Date: Wed, 1 Aug 2007 12:27:15 -0400
From: Douglas Allan Tutty <dtutty@porchlight.ca>
To: debian-user@lists.debian.org
Subject: Re: how to set network io priority for a process?
Message-ID: <20070801162715.GA10820@titan>
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline

On Wed, Aug 01, 2007 at 01:03:52PM -0300, Henrique de Moraes Holschuh wrote:

> On Wed, 01 Aug 2007, Douglas Allan Tutty wrote:
> > But not rsync, which I use whenever I can for large downloads due to
> > errors creeping in for some reason over my noisy phone line and freqent
> > line drops (and susequent redials by pppd).  
> 
> Why do you allow for damaged packets at all?
> 
> I used analog async ITU-T V42 modems for a *long* time (fortunately, I was
> able to move away before V9x hit the market).  You really want an error-free
> channel without compression for regular Internet over PPP domestic use, and
> any modem still on the market should be able to deliver that to you just
> fine.  Just configure it for error correction without compression, and have
> a proper error-free short and well-shielded serial connection to it if it is
> an external modem.
> 


Its an external 3Com Courier modem, that's not the problem.  I don't
know _where_ the errors happen, but the more times the download is
interrupted the more frequently there are issues somewhere in the iso.
Not a problem if I can find an rsync server with the file, but a royal
pain with plain ftp.  I _once_ had to download three defective copies of
an ISO (took a couple of weeks) and use that gnu tool that creates a
single good file out of three bad ones.

It has never been a problem when downloading packages via aptitude, even
if I have to interrupt it.  However, under sarge, I found that gftp
would die out and not resume properly, corrupting the file, and that
sometimes wget will also corrupt the file.  

For all I know, the errors are happening upstream of my ISP's modem.
I'm using porchlight which gives me unlimited for 9.99 per month.  This
never happened when I lived outside of Parry Sound, farther away from
the telephone exchange, but paid $24.95 per month.

Doug.



Date: Wed, 1 Aug 2007 18:28:46 +0200 (CEST)
From: Stephane Durieux <durieux42@yahoo.fr>
To: debian-user@lists.debian.org
Subject: Re: nfs problem while internet access broken
Message-ID: <375387.81641.qm@web27811.mail.ukl.yahoo.com>
Content-Type: text/plain; charset=iso-8859-1
Content-Transfer-Encoding: quoted-printable

--- Andrew Sackville-West
<andrew@farwestbilliards.com> a =E9crit :


> On Wed, Aug 01, 2007 at 05:51:40PM +0200, Stephane
> Durieux wrote:
> > Hello=20
> >=20
> > I encounter a problem whith my nfs stations.
> > If the server has not access to internet, they
> cannot
> > mount their directories !

>=20

> in what way is network access broken?=20

>=20

> >=20
> > I have checked /etc/fstab
> > nfs server is referenced by is ip
> >=20
> > /etc/nsswitch.conf
> > files hosts dns nis
> >=20
> > /etc/host.conf=20
> > order hosts, bind, nis

>=20

> none of these matter if you have no network
> connection. If the local
> machine cannot access any network then there is no
> way to mount nfs
> shares.=20

>=20

> what is the output of=20

>=20

> /sbin/ifconfig

>=20

> A

>=20
Of course the network connexion is good !
I can ping the server=20




      ___________________________________________________________________=
__________=20
Ne gardez plus qu'une seule adresse mail ! Copiez vos mails vers Yahoo! M=
ail=20

End of debian-user-digest Digest V2007 Issue #2079
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