date:20130410

Erwan David wrote:
> 2) add at the beginning of each /etc/init.d/myserv a test to stop if
> the encrypted partition is not mounted
> 
> Neither of those solutions seems acceptable for me.
> 
> So if someone has an idea, I'm listening.

I would do one of two things.  Either I would remove the /etc/rc?.d/S*
links associated with the services you don't want to start, or make
the script not executable.  Then start them manually later as you
wish.  Or I would install a /usr/sbin/policy-rc.d script that did your
automated check and only allowed the services to start if the disk was
mounted as you wish.

See the man page for invoke-rc.d for the first pass documentation.
Then read the README.policy-rc.d.gz file.

  man invoke-rc.d

  less /usr/share/doc/sysv-rc/README.policy-rc.d.gz

There is a huge amount of flexibility built into policy-rc.d that most
people will never need nor use.  This makes the documentation a little
bit overdone.  I will include a simple one that I am using at the
bottom so that you can get the feel for it.  In my case this is for a
chroot and I only want to allow cron and nullmailer to start there.
All other daemons are denied.  For your case you would want the
reverse and generally allow everything but exclude only the ones you
want to exclude.

Bob

#!/bin/sh
# /usr/sbin/policy-rc.d [options]   []
# /usr/sbin/policy-rc.d [options] --list  [ ...]
# See /usr/share/doc/sysv-rc/README.policy-rc.d for documentation.

# Live example scraped from ps:
#   /bin/sh /usr/sbin/policy-rc.d x11-common stop unknown

while [ $# -gt 0 ]; do
case $1 in
--list) exit 101 ;;
--quiet) shift ;;
-*) shift ;;
cron) exit 0 ;;
nullmailer) exit 0 ;;
*) exit 101 ;;
esac
done

exit 101

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Re: wheezy still missing php5-suhosin

On 11/04/2013 3:21 PM, Bob Proulx wrote:
> Andrew McGlashan wrote:
>> Yes, but insecure code is so easy to make and even the so called experts
>> are making them.  There is even an O'Reilly book that has wrong
>> information that is leading programmers astray.  The protections
>> provided by Suhosin in the past may _always_ be required and necessary.
> 
> This is all so nebulous and vague.  Is there an example that could be
> cited of a case that the suhosin patch will protect against in the
> php 5.4.4 interpreter?  Even one example would really help drive the
> point home.

I wish I could give you an example, but I can't.

You need to know exactly what Suhosin is protecting against, the code
implementation that causes vulnerability, and then you need someone to
test against that using newer PHP base.

>> It's not as bad as 95% of people running Java are using older versions
>> that are known to be exploitable, but there is plenty of exploitable PHP
>> code -- some may remain for years on non-patched servers, but new and
>> properly patched servers shouldn't be part of the problem.  PHP needs
>> to, upstream, make sure that programming flaws cannot be exploited and
>> that is what Suhosin aims to achieve.  Bad code will be there, we need
>> to be protected from it one way or another.
> 
> So...  Why isn't upstream PHP being pressured to address the problem?

Perhaps they have, the problem is that we just don't have the details...

If PHP upstream has committed to providing the same functionality as
Suhosin, and they've implemented it then we are sweet -- but right now,
we just don't know.

> And if they are really so bad why are so many people still using it?
> 
> Yes I have seen a lot of really horrid php code.  But I am not a heavy
> user of other people's code.  I am supporting one php application that
> I wrote and that is it at the moment.  And since I wrote it I am very
> familiar with the internals of it.  But it isn't representative of
> "other people's code".

I see messages from a Magento website, that is probably always going to
be somewhat out of date  don't ask me which module or where the code
problems are, but I see logcheck messages quite often from Suhosin on
stable servers.

Cheers
A.



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Hot sell

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Serveur with encrypted partition : 2 steps boot.

2013-04-10 Thread Erwan David

Hi,
I need to setup a distant server where some services store their data
on an encrypted disk. I'd like to be able to reboot server, which
should then start a minimal set of services (including ssh), which
would allow me to then mount the encrypted disk through an ssh
connection, and start the services which need the encrypted disk to be
mounted.

I'd like to do it in a way which would not disturb standard debian
tools nor packages upgrade.

My solutions so far are :

1) use a centos/fedora, where I can have services not automatically
started at boot which I can start manually through 
service myserv start (it generally do not work in debian since
/etc/init.d.myserv will check in /etc/default wether to start service
or not)

2) add at the beginning of each /etc/init.d/myserv a test to stop if
the encrypted partition is not mounted

Neither of those solutions seems acceptable for me.

So if someone has an idea, I'm listening.

Thanks everybody.


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Re: wheezy still missing php5-suhosin

Andrew McGlashan wrote:
> Yes, but insecure code is so easy to make and even the so called experts
> are making them.  There is even an O'Reilly book that has wrong
> information that is leading programmers astray.  The protections
> provided by Suhosin in the past may _always_ be required and necessary.

This is all so nebulous and vague.  Is there an example that could be
cited of a case that the suhosin patch will protect against in the
php 5.4.4 interpreter?  Even one example would really help drive the
point home.

> It's not as bad as 95% of people running Java are using older versions
> that are known to be exploitable, but there is plenty of exploitable PHP
> code -- some may remain for years on non-patched servers, but new and
> properly patched servers shouldn't be part of the problem.  PHP needs
> to, upstream, make sure that programming flaws cannot be exploited and
> that is what Suhosin aims to achieve.  Bad code will be there, we need
> to be protected from it one way or another.

So...  Why isn't upstream PHP being pressured to address the problem?
And if they are really so bad why are so many people still using it?

Yes I have seen a lot of really horrid php code.  But I am not a heavy
user of other people's code.  I am supporting one php application that
I wrote and that is it at the moment.  And since I wrote it I am very
familiar with the internals of it.  But it isn't representative of
"other people's code".

Bob

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Mac Mini EFI issues

2013-04-10 Thread Aaron Dewell


Hello all,

I've been installing wheezy on a Mini for most of the afternoon/evening, and 
I'm nearly there.  The first issue with the install was that grub-pc is 
installed by default, so I had to manually purge it and install grub-efi before 
reboot.  grub-efi installation was also highly manual and still not complete.

Second problem was that that partman set the partition type to EF00 on the root 
filesystem…  So nothing could see it.  I manually changed it to 8300 (using 
gdisk), not sure if that was correct or not, but it has at least let the Mac 
side see it as something other than Free Space.  However, Fuse-ext2 still 
doesn't see it, so perhaps the partition tag is still wrong.

I'm at the point now that grub-efi gives me a command prompt (when EFI loaded 
from holding down the option key, aka Apple Boot Selector or something), with 
zero configuration.  Got that covered, except the kernel won't load due to not 
finding the root filesystem (root=/dev/sdb3 not working).  I'm about to try 
UUID next.  Course, I had to boot off CD again to find the UUID...

rEFInd still doesn't see the bootable Linux partition.  But that's out of scope 
of this mailing list.

So my question is: should setting this up have been so difficult?  Or is it 
just not optimized for an Intel Mac and they are inherently problematic?  Or 
did I do things wrong?

I am trying to avoid a hybrid partition table, as there will be no Windows on 
this (well, not directly).  My actual goal is to run this Debian install as Xen 
dom0 and migrate the existing MacOS X into a domU plus add windows as well.  
But that's a later step.

Any suggestions appreciated!  Thanks,

Aaron


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Re: which operation leads to the close all opening terminals

 > Without data, we can only speculate. Here's my wild speculation:
> 
> You thought you had multiple terminals open, but what you had
> was a single master process with multiple sub-processes. A

I did have multiple terminals open.

It only happened once, at least in what I can recall.

> failure of some kind happened in the master process and when it
> died, it took all the children with it.
> 
> -dsr-


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Starting Iceweasel

2013-04-10 Thread Ethan Rosenberg, PhD


Dear list -

Thanks for all your help.

Finally, I can start Iceweasel from the command line [sort of]: 
iceweasel -no-remote localhost/choice.php width $1280 height $800


The above works.

But ... in a store.desktop multiple windows are opened.

#!/usr/bin/env xdg-open

[Desktop Entry]
Encoding=UTF-8
Name=Store Program

Exec=iceweasel -no-remote localhost/choice.php width $1280 height $800
Terminal=false
X-MultipleArgs=false
Type=Application
Icon=iceweasel
Categories=Network;WebBrowser;
MimeType=text/html;text/xml;application/xhtml+xml;application/xml;application/vnd.mozilla.xul+xml;application/rss+xml;application/rdf+xml;image/gif;image/jpeg;image/png;
StartupWMClass=Firefox-bin
StartupNotify=true

=
FYI Iceweasel is NOT running when I issue the command or click on the icon.

TIA

Ethan

PS
The suggestions on migrating icedove to Thunderbird look excellent.

I'm reasonably good at three things at one time, but six is a little 
much.  As soon as I can climb out of the hole I am in, I'll do the 
migration and give a detailed answer.



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Re: which operation leads to the close all opening terminals

 > I´d also be interested in ~/.xsession-errors by the time of the incident.


** (xfce4-session:4890): WARNING **: ICE connection 0x7f00400422b0 rejected

** (gnome-terminal:22938): WARNING **: Failed to connect to the session
manager
: Authentication Rejected, reason : None of the authentication protocols
specified are supported and host-based authentication failed


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Re: which operation leads to the close all opening terminals

> Imho, the geeks are interested in the output of `dmesg' and the contents
> of `/var/log/syslog'.


Apr 10 23:57:01 dove kernel: [130001.429581] gnome-terminal[6910]:
segfault at
1 ip 7fbbadb22816 sp 7e7fc7c0 error 4 in
libgobject-2.0.so.0.3200.4
[7fbbadb0b000+4e000]


Is it related?

> The closer in time to the incident, the better.
> 
> 


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Re: wheezy still missing php5-suhosin

On 11/04/2013 5:40 AM, Bob Proulx wrote:
> What I have read (caution unverified) is that the PHP interpreter
> isn't intrinsically insecure.  It only becomes that way when used with
> insecure php code.  Which makes sense.  Any upstream interpreter
> vulnerability would have a CVE number associated with it that would be
> tracked.  I see people calling for those reports but none are being
> provided for any current vulnerabilities.

Yes, but insecure code is so easy to make and even the so called experts
are making them.  There is even an O'Reilly book that has wrong
information that is leading programmers astray.  The protections
provided by Suhosin in the past may _always_ be required and necessary.

It's not as bad as 95% of people running Java are using older versions
that are known to be exploitable, but there is plenty of exploitable PHP
code -- some may remain for years on non-patched servers, but new and
properly patched servers shouldn't be part of the problem.  PHP needs
to, upstream, make sure that programming flaws cannot be exploited and
that is what Suhosin aims to achieve.  Bad code will be there, we need
to be protected from it one way or another.

Cheers
A.

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Re: debian-6.0.7-amd64 how to set resolution and refresh for free NVIDIA X drivers?

Ralf Mardorf wrote:
> What's the package name for Debian that does include GET?

  $ apt-file search /usr/bin/GET
  libwww-perl: /usr/bin/GET

> ... cat does show it correctly formatted, but this already does work
> using wget.

Huh?  Works fine for me.

> [rocketmouse@archlinux ~]$ wget 
> http://holgerdanske.com/users/dpchrist/bug-reports/debian/squeeze/amd64/X/a64x23800p-20130409-140018-xorg.conf.new
> --2013-04-11 04:34:09--  
> http://holgerdanske.com/users/dpchrist/bug-reports/debian/squeeze/amd64/X/a64x23800p-20130409-140018-xorg.conf.new
> [snip]
> [rocketmouse@archlinux ~]$ cat a64x23800p-20130409-140018-xorg.conf.new

Yep.  Works fine here.

Bob


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Indonesia Corporate Financial Reporting

2013-04-10 Thread Fortress Intelligence

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We look forward to your participation at this seminar.

* To unsubscribe from our mailing list, please reply to this email with the 
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Re: debian-6.0.7-amd64 how to set resolution and refresh for free NVIDIA X drivers?

On Thu, 2013-04-11 at 01:52 +0200, Benjamin Egner wrote:
> I deleted the earlier messages. Hopefully, this is appropriate:
> I wrote a startup script to fix my resolution aka `add new modes' to the 
> ones xrandr is showing you.
> --
> 
> #!/bin/bash
> # Purpose: Setting the monitor parameters for Samsung 943nw
> # Date:   2013-03-19
> # Author:  BE
> # Source:  For the startup-script idea:
> #  http://forums.debian.net/viewtopic.php?f=16&t=78330
> #
> #
> 
> # modeline obtained manually via `gtf' call.
> 
> xrandr --newmode "1440x900_70.00"  126.98  1440 1536 1688 1936  900 901 
> 904 937  -HSync +Vsync
> xrandr --addmode VBOX0 1440x900_70.00
> xrandr --output VBOX0 --mode 1440x900_70.00
> 
> --
> 
> 1. You have to create _your_ modelines
> 2. Replace VBOX0 with what you see when you run xrandr alone.
> 3. Hopefully shed tears of joy

As mentioned by me in two previous posts. You might need a modeline and
you can get the needed values by the command "cvt , e.g.:

[rocketmouse@archlinux ~]$ cvt 1152 864 90
# 1152x864 89.80 Hz (CVT) hsync: 81.99 kHz; pclk: 127.25 MHz
Modeline "1152x864_90.00"  127.25  1152 1232 1352 1552  864 867 871 913
-hsync +vsync

Regards,
Ralf


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Re: debian-6.0.7-amd64 how to set resolution and refresh for free NVIDIA X drivers?

On Wed, 2013-04-10 at 11:44 -0700, David Christensen wrote:
> On 04/10/13 07:53, Jonathan Dowland wrote:
> > On Tue, Apr 09, 2013 at 11:43:44PM +0200, Ralf Mardorf wrote:
> >> When opening your links they were not good formatted,
> 
> Agreed.  Iceweasle seems to be dropping the newlines and folding the 
> lines together.  View -> Page Source looks much better.

For Firefox 20.0 it does work with
Right click > View Page Source
I didn't know that. It's not provided by the View-menu.


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Re: debian-6.0.7-amd64 how to set resolution and refresh for free NVIDIA X drivers?

On Wed, 2013-04-10 at 15:53 +0100, Jonathan Dowland wrote:
> On Tue, Apr 09, 2013 at 11:43:44PM +0200, Ralf Mardorf wrote:
> > When opening your links they were not good formatted,
> 
> they are being sent (incorrectly) as content-type: text/html, so web browsers
> will try to render them as HTML - but a simple tool like 'GET' is OK:
> 
> > $ GET 
> > http://holgerdanske.com/users/dpchrist/bug-reports/debian/squeeze/amd64/X/a64x23800p-20130409-140018-xorg.conf.new

What's the package name for Debian that does include GET?

I only found this: http://linux.about.com/library/cmd/blcmdl1_GET.htm

*?*

On Arch I found perl-libwww ...

[rocketmouse@archlinux ~]$ pacman -Ql perl-libwww | grep perl/lwp
perl-libwww /usr/bin/vendor_perl/lwp-download
perl-libwww /usr/bin/vendor_perl/lwp-dump
perl-libwww /usr/bin/vendor_perl/lwp-mirror
perl-libwww /usr/bin/vendor_perl/lwp-request
[rocketmouse@archlinux ~]$ lwp-download 
http://holgerdanske.com/users/dpchrist/bug-reports/debian/squeeze/amd64/X/a64x23800p-20130409-140018-xorg.conf.new
Saving to 'a64x23800p-20130409-140018-xorg.conf.new.html'...
2.63 KB received
[rocketmouse@archlinux ~]$ cat a64x23800p-20130409-140018-xorg.conf.new.html

... cat does show it correctly formatted, but this already does work
using wget.

[rocketmouse@archlinux ~]$ rm a64x23800p-20130409-140018-xorg.conf.new.html
[rocketmouse@archlinux ~]$ wget 
http://holgerdanske.com/users/dpchrist/bug-reports/debian/squeeze/amd64/X/a64x23800p-20130409-140018-xorg.conf.new
--2013-04-11 04:34:09--  
http://holgerdanske.com/users/dpchrist/bug-reports/debian/squeeze/amd64/X/a64x23800p-20130409-140018-xorg.conf.new
[snip]
[rocketmouse@archlinux ~]$ cat a64x23800p-20130409-140018-xorg.conf.new

Regards,
Ralf

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Re: debian-6.0.7-amd64 how to set resolution and refresh for free NVIDIA X drivers?

2013-04-10 Thread Brian

On Wed 10 Apr 2013 at 16:50:54 -0700, David Christensen wrote:

> I have a KVM (IOGEAR GCS78)that doesn't seem to pass through monitor
> information.  :-(
> 
> Normally, I provide monitor information to the X server via
> xorg.conf, using the xorg.conf.new generated by "Xorg -configure" as
> a starting point.  But, as I stated before, the generated
> xorg.conf.new is broken.

First test the display resolution you want to have as described by
Benjamin. If it works you can use my xorg.conf as a basis to write
yours:

  Section "Device"
  Identifier   "FX5200"
  Driver   "nouveau"
  EndSection

  Section "Monitor"
  Identifier   "1905FP"
  Modeline "1280x1024"  115.00  1280 1368 1496 1712  1024 1027 1034 
1063 -hsync +vsync
  HorizSync 30-81
  VertRefresh   56-76
  EndSection

  Section "Screen"
  Identifier"Default Screen"
  Device"FX5200"
  Monitor   "1905FP"
  DefaultDepth   16
  SubSection "Display"
  Depth  16
  Modes "1280x1024"
  EndSubSection
  EndSection

I used 'cvt 1280 1024' to get the Modeline.


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Re: debian-6.0.7-amd64 how to set resolution and refresh for free NVIDIA X drivers?


On 04/10/13 16:28, Brian wrote:

dpchrist@a64x23800p:~$ xrandr
Screen 0: minimum 320 x 200, current 1024 x 768, maximum 4096 x 4096
VGA-1 connected 1024x768+0+0 (normal left inverted right x axis y
axis) 0mm x 0mm
1024x768   60.0*
800x60060.3 56.2
848x48060.0
640x48059.9
DVI-D-1 disconnected (normal left inverted right x axis y axis)
TV-1 disconnected (normal left inverted right x axis y axis)

You have a monitor which can do 1600x1200 but xorg can only see fit
to give you 1024x768. This may be because the monitor is not
providing suitable information to xorg, so it serves up 1024x768 so
as not to disappoint you.


I have a KVM (IOGEAR GCS78)that doesn't seem to pass through monitor 
information.  :-(


Normally, I provide monitor information to the X server via xorg.conf, 
using the xorg.conf.new generated by "Xorg -configure" as a starting 
point.  But, as I stated before, the generated xorg.conf.new is broken.


> Look at the Xorg log in /var/log and search
> in particular for 'EDID'. Is there anything like that or references
> to monitor resolution there?

Looking at:

http://holgerdanske.com/users/dpchrist/bug-reports/debian/squeeze/amd64/X/a64x23800p-20130409-141117-Xorg.0.log

I see:

(II) NOUVEAU(0): EDID for output VGA-1
(II) NOUVEAU(0): Not using default mode "640x350" (vrefresh out of range)
(II) NOUVEAU(0): Not using default mode "320x175" (vrefresh out of range)
(II) NOUVEAU(0): Not using default mode "640x400" (vrefresh out of range)
...
(II) NOUVEAU(0): Not using default mode "1024x768" (vrefresh out of range)
(II) NOUVEAU(0): Not using default mode "2048x1536" (vrefresh out of range)
(II) NOUVEAU(0): Not using default mode "1024x768" (vrefresh out of range)
(II) NOUVEAU(0): Printing probed modes for output VGA-1
(II) NOUVEAU(0): Modeline "1024x768"x60.0   65.00  1024 1048 1184 1344 
768 771 777 806 -hsync -vsync (48.4 kHz)
(II) NOUVEAU(0): Modeline "800x600"x60.3   40.00  800 840 968 1056  600 
601 605 628 +hsync +vsync (37.9 kHz)
(II) NOUVEAU(0): Modeline "800x600"x56.2   36.00  800 824 896 1024  600 
601 603 625 +hsync +vsync (35.2 kHz)
(II) NOUVEAU(0): Modeline "848x480"x60.0   33.75  848 864 976 1088  480 
486 494 517 +hsync +vsync (31.0 kHz)
(II) NOUVEAU(0): Modeline "640x480"x59.9   25.18  640 656 752 800  480 
489 492 525 -hsync -vsync (31.5 kHz)

(II) NOUVEAU(0): EDID for output DVI-D-1
(II) NOUVEAU(0): EDID for output TV-1
(II) NOUVEAU(0): Output VGA-1 connected
(II) NOUVEAU(0): Output DVI-D-1 disconnected
(II) NOUVEAU(0): Output TV-1 disconnected
(II) NOUVEAU(0): Using fuzzy aspect match for initial modes
(II) NOUVEAU(0): Output VGA-1 using initial mode 1024x768

David


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Re: debian-6.0.7-amd64 how to set resolution and refresh for free NVIDIA X drivers?

2013-04-10 Thread Benjamin Egner


I deleted the earlier messages. Hopefully, this is appropriate:
I wrote a startup script to fix my resolution aka `add new modes' to the 
ones xrandr is showing you.

--

#!/bin/bash
# Purpose: Setting the monitor parameters for Samsung 943nw
# Date:   2013-03-19
# Author:  BE
# Source:  For the startup-script idea:
#  http://forums.debian.net/viewtopic.php?f=16&t=78330
#
#

# modeline obtained manually via `gtf' call.

xrandr --newmode "1440x900_70.00"  126.98  1440 1536 1688 1936  900 901 
904 937  -HSync +Vsync

xrandr --addmode VBOX0 1440x900_70.00
xrandr --output VBOX0 --mode 1440x900_70.00

--

1. You have to create _your_ modelines
2. Replace VBOX0 with what you see when you run xrandr alone.
3. Hopefully shed tears of joy


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Re: debian-6.0.7-amd64 how to set resolution and refresh for free NVIDIA X drivers?

2013-04-10 Thread Brian

On Wed 10 Apr 2013 at 11:37:26 -0700, David Christensen wrote:

> xrandr works:
> 
> dpchrist@a64x23800p:~$ xrandr
> Screen 0: minimum 320 x 200, current 1024 x 768, maximum 4096 x 4096
> VGA-1 connected 1024x768+0+0 (normal left inverted right x axis y
> axis) 0mm x 0mm
>1024x768   60.0*
>800x60060.3 56.2
>848x48060.0
>640x48059.9
> DVI-D-1 disconnected (normal left inverted right x axis y axis)
> TV-1 disconnected (normal left inverted right x axis y axis)

You have a monitor which can do 1600x1200 but xorg can only see fit
to give you 1024x768. This may be because the monitor is not
providing suitable information to xorg, so it serves up 1024x768 so
as not to disappoint you. Look at the Xorg log in /var/log and search
in particular for 'EDID'. Is there anything like that or references
to monitor resolution there?

> My xrandr apparently has no "--output X --list" option:

Neither has anyone elses.

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Re: RAID 6 mdadm

2013-04-10 Thread Stan Hoeppner

On 4/10/2013 12:32 PM, Dexter Filmore wrote:
> Am Wednesday 10 April 2013 18:05:08 schrieb Ross Boylan:
>>>
>>> You cannot get more than about 200MB/s out of a RAID1 setup, not even
>>> with
>>> 15krpm SAS drives. the RAID1 will never be faster than a single disk.
>>> How
>>> would it.
>>
>> It can read faster than a single disk by combining reads from different
>> sectors on different disks.  I think your assertion is incorrect for
>> reading, though  not for writing.
>>
>> Ross Boylan
> 
> Then dm would have to manage/combine the reads from the involved disks.
> I do not know better, but I doubt this is done. 
> I'll ask the raid list for curiousity's sake.

It's not necessary to ask on linux-raid, and as you have not yet done
so, I'll clarify this now:

Both the md RAID1 and RAID10 personalities will read sectors in parallel
from both disks in a mirror pair in most circumstances.  This has been
the case for many years.  This is a read optimization only.  Writes
occur in parallel as well, obviously, but as it's the same data the net
data throughput isn't doubled, only the raw device throughput.  This
should be obvious to anyone.  I'm merely being complete in my description.

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Re: RAID 6 mdadm

2013-04-10 Thread Stan Hoeppner

On 4/10/2013 9:15 AM, Muhammad Yousuf Khan wrote:

> actually what i need is 4GB LAN throughput with teaming (802.3ad) for data
> storage to backup VMs and same huge data manipulations will be done. so
> just confused if it going to work or not.

Addressing the bonded ethernet issue:

802.3ad LACP configured at the switch and within the Linux bonding
driver will facilitate TRANSMIT TCP stream load balancing.  However, it
does nothing to address RECEIVE load balancing.  Your application is a
~100% receive workload.  So LACP is out.  Linux balance-alb is required
to achieve any level of receive load balancing.  It does not require
bonding support in the switch.  And it only works with IPv4.

See:  https://www.kernel.org/doc/Documentation/networking/bonding.txt

Addressing the storage issue:

RAID6 only has good write performance in a single scenario: large single
streaming writes, such as video recording, large file backup, etc.  If
your writes are smaller than stripe width you incur read-modify-write
cycles.  These can triple (or more) the number of heads seeks per drive
required to complete the write, and you suffer the extra rotational
latency in between the seeks.  Thus if you're performing multiple
partial stripe width writes in parallel, then your performance, even
with expensive hardware, will drop into the teens of MB/s.  And if
you're doing multiple streams RAID6 isn't suitable simply due to the
extra head seek and rotational latency of double rotating parity writes.

So if you're serious about achieving an aggregate 400MB/s of write
throughput to the array, with this workload, you're very likely not
going to get there with 8x 7.2K SATA drives in RAID6.  Depending on how
many concurrent backup streams you're running, and what filesystem
you're using, you might get close to 400MB/s using 10 drives in RAID10.
 The more concurrent jobs, the more spindles you need to mitigate the
extra seeks.  This will also greatly depend on your backup job write
pattern, and thus the chunk/stripe width you select for the array.  The
RAID parameters must match the application write pattern or performance
may be horrible.

And lastly, select the right filesystem for the job.  EXT3/4 are not
suitable for large parallel streaming writes.  You will likely need XFS
for this workload for optimal performance, and you'll need to align the
filesystem to the md/RAID stripe parameters during mkfs.  If you're
directly formatting the md/RAID device, mkfs.xfs will query the kernel
and configure proper alignment automatically.  If you use LVM between
md/RAID and XFS then you'll need to do manual alignment during mkfs.xfs.

Parting thought:  It's very easy to get 400MB/s write throughput from an
8 SATA drive md/RAID6 array when doing single streaming writes from 'dd'
or other simple one dimensional tests.  However, achieving 400MB/s with
real workloads is a completely different matter and much more demanding.
 Most of the md/RAID throughput data you'll find via Google comes from
these one dimensional simplistic tests.  Don't trust this information.
Look for specific workload tests or synthetic benchmark data from
bonnie, iozone, etc.  While these won't precisely mimic your workload,
they give a much better picture of potential real world performance.
And the numbers will always be much, much smaller than 'dd' numbers.

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Re: Information not on relavant man page - where to find on WEB?

Bob Proulx wrote:

Richard Owlett wrote:

I often do not have available a functioning Linux system, thus my
need for web based source of information.

The FreeBSD man page site is an excellent source for online web access
to various system man pages. More than just FreeBSD. They are
hosting the service but include access to many other systems man
pages. Unfortunately Debian is not among them. But I mention it for
you in your quest for online man pages.

http://www.freebsd.org/cgi/man.cgi

Debian man pages are provided here at this site:

http://manpages.debian.net/

My current problem is proper use of dpkg-scanpackages. I need
examples of its typical and atypical use. I need those to give me
the background for a sensible question.

The online debian man page for dpkg-scanpackages is available here:

http://manpages.debian.net/cgi-bin/man.cgi?query=dpkg-scanpackages&apropos=0&sektion=0&manpath=Debian+6.0+squeeze&format=html&locale=en

Where I started ;)

The Debian wiki is also a good source of information. Follow the
links through from it and you will find a HOWTO document on it.

http://wiki.debian.org/HowToSetupADebianRepository

It had given me just enough to tantalize.

As an alternative many people use other package pool management
systems. Such as reprepro. I have converted over to using it and am
happy with it.

I saw that mentioned in passing once. This time I browsed
its man page. By the breadth of options it may be overkill
but it appears capable. I am impressed with the additional
documentation available. So far I've had a quick look at

http://wiki.debian.org/SettingUpSignedAptRepositoryWithReprepro
http://www.jejik.com/articles/2006/09/setting_up_and_managing_an_apt_repository_with_reprepro/

http://git.debian.org/?p=mirrorer/reprepro.git;a=blob_plain;f=docs/manual.html;hb=HEAD

http://anonscm.debian.org/gitweb/?p=mirrorer/reprepro.git;a=blob_plain;f=docs/FAQ;hb=HEAD

A detailed read and link following should keep me occupied
for a while.

There are advantages to retirement ;)
Thanks.

Bob

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Re: Data Archiving

2013-04-10 Thread MRH


On 08/04/13 20:59, Rob Owens wrote:

On Mon, Apr 08, 2013 at 09:30:52AM -0700, Gary Roach wrote:

As for as OCR vs retyping vs scan and preses - still up in the air
at this point. I suspect that all three methods might be used.


There are commercial companies that will do bulk scanning and OCR.  I
used one in the past and I found the price to be pretty reasonable.  I'm
not sure if anybody has OCR software that works on hand-written
documents, though...

-Rob




If the database / digital storage space is not a problem I'd rather 
suggest storing scanned documents as they are (in graphical format) - 
you never know when this may come handy. Sometimes you want to see how 
the document looked like, not just to read its content only. And OCRed 
version for searching purposes, linked with the images.


I remember there was a (commercial, MS Windows) Russian OCR software 
some years ago, really good working then; probably it could handle 
handwriting to some extent:

http://finereader.abbyy.com/
I never used it for handwritten text though.
Another option is to hire some teenagers or students who'd like to earn 
some additional money if you have funds for that - both ways need 
proof-reading afterwards.


Not sure which database would be good for storing images; is MySQL 
capable of managing it in an efficient way; perhaps Postgress SQL or 
another solution is better. You could also store the images on the drive 
and keep links (paths) to the images in the database.


Did you try contacting other institutions which might have similar needs 
- what do they use?


Kind regards,
Michal
--
Michal R. Hoffmann


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Re: Information not on relavant man page - where to find on WEB?

Linux-Fan wrote:
> Often the info-pages do not give any additional details (I have just
> verified this for "dpkg-scanpackages" where both info and manpage seemed
> equal after a quick glance).

Uhm...  Are you sure you were looking at info pages?  AFAIK the
dpkg-dev package which includes dpkg-scanpackages does not provide any
info pages.  It only provides man pages.  I think you must have been
looking at the man page in the info viewer which falls back to man
pages if no info pages are present.

I think this entire subthread talking about info pages is a red
herring and off the scent of looking for dpkg-scanpackages
documentation.

Bob

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Re: Information not on relavant man page - where to find on WEB?

Richard Owlett wrote:
> I often do not have available a functioning Linux system, thus my
> need for web based source of information.

The FreeBSD man page site is an excellent source for online web access
to various system man pages.  More than just FreeBSD.  They are
hosting the service but include access to many other systems man
pages.  Unfortunately Debian is not among them.  But I mention it for
you in your quest for online man pages.

  http://www.freebsd.org/cgi/man.cgi

Debian man pages are provided here at this site:

  http://manpages.debian.net/

> My current problem is proper use of dpkg-scanpackages. I need
> examples of its typical and atypical use. I need those to give me
> the background for a sensible question.

The online debian man page for dpkg-scanpackages is available here:

http://manpages.debian.net/cgi-bin/man.cgi?query=dpkg-scanpackages&apropos=0&sektion=0&manpath=Debian+6.0+squeeze&format=html&locale=en

The Debian wiki is also a good source of information.  Follow the
links through from it and you will find a HOWTO document on it.

  http://wiki.debian.org/HowToSetupADebianRepository

As an alternative many people use other package pool management
systems.  Such as reprepro.  I have converted over to using it and am
happy with it.

Bob

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Re: RAID 6 mdadm

2013-04-10 Thread Gary Dale


On 10/04/13 12:05 PM, Ross Boylan wrote:

On Wed, 2013-04-10 at 17:57 +0200, Dexter Filmore wrote:

Am Wednesday 10 April 2013 17:21:35 schrieb Muhammad Yousuf Khan:

exactly, i am using RAID 1 with mdadm and not more then 230 or 300MB
throughput.  and the people are harnessing 4GB so this is the point

where i

am confused

You cannot get more than about 200MB/s out of a RAID1 setup, not even
with
15krpm SAS drives. the RAID1 will never be faster than a single disk.
How
would it.

It can read faster than a single disk by combining reads from different
sectors on different disks.  I think your assertion is incorrect for
reading, though  not for writing.

Ross Boylan
Exactly. Most data is read more often than it is written so that read 
performance is critical.


In the particular setup of RAID6 with only 3 drives, each drive gets the 
same amount of information as they would in RAID1 so that write 
performance also does not change. However RAID1 requires less CPU time 
and is arguably more reliable (please let's not start a debate on this - 
it's not a big issue).


The advantage of RAID6 comes when you have 4 or more disks. Because each 
disk then gets only part of the data, write performance can improve.




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Re: Information not on relavant man page - where to find on WEB?

2013-04-10 Thread Linux-Fan

On 04/10/2013 09:19 PM, Richard Owlett wrote:
> Carroll Grigsby wrote:
>> On Wed, 10 Apr 2013 13:48:26 -0500
>> Richard Owlett  wrote:
>>
>>> Man pages generally do not include information some users
>>> would find vital.
>>>
>>> In fact
>>> http://manpages.debian.net/cgi-bin/man.cgi?query=intro&sektion=1&apropos=0&manpath=Debian+6.0+squeeze&title=Introduction%20Section%201
>>>
>>>
>>> explicitly states in part:
>>> "... Man pages are terse, and allow  you to find quickly
>>> some forgotten detail.  For newcomers an  introductory text
>>> with more examples and explanations is useful."
>>> and later states:
>>> "A  lot  of  GNU/FSF  software  is provided with info files."
>>>
>>> I often do not have available a functioning Linux system,
>>> thus my need for web based source of information.
>>>
>>> My current problem is proper use of dpkg-scanpackages. I
>>> need examples of its typical and atypical use. I need those
>>> to give me the background for a sensible question.

Often the info-pages do not give any additional details (I have just
verified this for "dpkg-scanpackages" where both info and manpage seemed
equal after a quick glance).

However, I can not help you with "dpkg-scanpackages"-usage.

>>> Pointers please.
>>> TIA
>>
>> Try the info package -- it should be installed on your system. Enter
>> "info info" at a terminal. Then enter "info dpkg". After that, you're
>> on your own.
>>
>> -- cmg
>>
> 
> BUT I SAID
> "I often do not have available a functioning Linux system,
> thus my need for web based source of information."
> 
> That is my current situation, hence my explicit request for we based
> information ;/

-- 
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Re: wheezy still missing php5-suhosin

Andrew McGlashan wrote:
> To cut a long story short, if PHP upstream has incorporated the features
> of Suhosin, then we should be fine; is it the final conclusion from that
> long thread and all the references from it, that we are in good shape
> with 5.4.4 -- better than pre 5.4 with Suhosin?

To be honest I have not read through all of that information myself
yet in enough detail to know one way or the other.  It really needs
the skills of an upstream interpreter developer to know.  I would love
to hear from someone who is familiar with the code well enough to make
an intelligent summary.

What I have read (caution unverified) is that the PHP interpreter
isn't intrinsically insecure.  It only becomes that way when used with
insecure php code.  Which makes sense.  Any upstream interpreter
vulnerability would have a CVE number associated with it that would be
tracked.  I see people calling for those reports but none are being
provided for any current vulnerabilities.

Bob

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Re: Partitioning problem

2013-04-10 Thread Chris Bannister

On Tue, Apr 09, 2013 at 01:52:57PM +0200, Alexandre De Muer wrote:
> Hi, When installing from  "Debian GNU/kFreeBSD 6.0.7 "Squeeze" -
> Official kfreebsd-i386 DVD Binary-1 20130223-17:32"the following
> problem issued from "guided partition layout":"unable to set mount
> from file-system type swap on ** to none". The hardware I'm using: AMD
> Athlon XP 2200+, MSI 6511 ver1 motherboard, 386 Mb RAM, 250 Gb Maxtor
> drive.I'm a regular user and wanted to hear what fix exists for this
> problem.
> Alexandre De Muer

Since there doesn't seem to be any users of Debian GNU/kFreeBSD on this
list who can help you, you may have better luck on the debian-bsd list:
http://lists.debian.org/debian-bsd/

-- 
"If you're not careful, the newspapers will have you hating the people
who are being oppressed, and loving the people who are doing the 
oppressing." --- Malcolm X


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Re: Information not on relavant man page - where to find on WEB?


Carroll Grigsby wrote:

On Wed, 10 Apr 2013 13:48:26 -0500
Richard Owlett  wrote:


Man pages generally do not include information some users
would find vital.

In fact
http://manpages.debian.net/cgi-bin/man.cgi?query=intro&sektion=1&apropos=0&manpath=Debian+6.0+squeeze&title=Introduction%20Section%201

explicitly states in part:
"... Man pages are terse, and allow  you to find quickly
some forgotten detail.  For newcomers an  introductory text
with more examples and explanations is useful."
and later states:
"A  lot  of  GNU/FSF  software  is provided with info files."

I often do not have available a functioning Linux system,
thus my need for web based source of information.

My current problem is proper use of dpkg-scanpackages. I
need examples of its typical and atypical use. I need those
to give me the background for a sensible question.

Pointers please.
TIA





Try the info package -- it should be installed on your system. Enter
"info info" at a terminal. Then enter "info dpkg". After that, you're
on your own.

-- cmg



BUT I SAID
"I often do not have available a functioning Linux system,
thus my need for web based source of information."

That is my current situation, hence my explicit request for 
we based information ;/




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Re: Information not on relavant man page - where to find on WEB?

2013-04-10 Thread Carroll Grigsby

On Wed, 10 Apr 2013 13:48:26 -0500
Richard Owlett  wrote:

> Man pages generally do not include information some users 
> would find vital.
> 
> In fact
> http://manpages.debian.net/cgi-bin/man.cgi?query=intro&sektion=1&apropos=0&manpath=Debian+6.0+squeeze&title=Introduction%20Section%201
> 
> explicitly states in part:
> "... Man pages are terse, and allow  you to find quickly 
> some forgotten detail.  For newcomers an  introductory text 
> with more examples and explanations is useful."
> and later states:
> "A  lot  of  GNU/FSF  software  is provided with info files."
> 
> I often do not have available a functioning Linux system, 
> thus my need for web based source of information.
> 
> My current problem is proper use of dpkg-scanpackages. I 
> need examples of its typical and atypical use. I need those 
> to give me the background for a sensible question.
> 
> Pointers please.
> TIA
> 
> 
> 

Try the info package -- it should be installed on your system. Enter
"info info" at a terminal. Then enter "info dpkg". After that, you're
on your own.

-- cmg


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Information not on relavant man page - where to find on WEB?

Man pages generally do not include information some users 
would find vital.


In fact
http://manpages.debian.net/cgi-bin/man.cgi?query=intro&sektion=1&apropos=0&manpath=Debian+6.0+squeeze&title=Introduction%20Section%201

explicitly states in part:
"... Man pages are terse, and allow  you to find quickly 
some forgotten detail.  For newcomers an  introductory text 
with more examples and explanations is useful."

and later states:
"A  lot  of  GNU/FSF  software  is provided with info files."

I often do not have available a functioning Linux system, 
thus my need for web based source of information.


My current problem is proper use of dpkg-scanpackages. I 
need examples of its typical and atypical use. I need those 
to give me the background for a sensible question.


Pointers please.
TIA



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Re: debian-6.0.7-amd64 how to set resolution and refresh for free NVIDIA X drivers?


On 04/10/13 07:53, Jonathan Dowland wrote:

On Tue, Apr 09, 2013 at 11:43:44PM +0200, Ralf Mardorf wrote:

When opening your links they were not good formatted,


Agreed.  Iceweasle seems to be dropping the newlines and folding the 
lines together.  View -> Page Source looks much better.


David


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Re: debian-6.0.7-amd64 how to set resolution and refresh for free NVIDIA X drivers?


On 04/10/13 07:46, Jonathan Dowland wrote:

... it may be worth trying the next release of Debian, currently considered 
'testing', known as 'wheezy'.


I'll keep it in mind; certainly when Wheezy becomes the new "stable".

David


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Re: debian-6.0.7-amd64 how to set resolution and refresh for free NVIDIA X drivers?


On 04/10/13 01:51, "Morel Bérenger" wrote:

2.  How do I determine the current color depth

xrandr --output  --list


xrandr works:

dpchrist@a64x23800p:~$ xrandr
Screen 0: minimum 320 x 200, current 1024 x 768, maximum 4096 x 4096
VGA-1 connected 1024x768+0+0 (normal left inverted right x axis y axis) 
0mm x 0mm

   1024x768   60.0*
   800x60060.3 56.2
   848x48060.0
   640x48059.9
DVI-D-1 disconnected (normal left inverted right x axis y axis)
TV-1 disconnected (normal left inverted right x axis y axis)

My xrandr apparently has no "--output X --list" option:

dpchrist@a64x23800p:~$ xrandr --output VGA-1 --list
usage: xrandr [options]
  where options are:
  -display  or -d 
  -help
  -o 
or --orientation 
  -qor --query
  -s /x or --size /x
  -r  or --rate  or --refresh 
  -vor --version
  -x(reflect in x)
  -y(reflect in y)
  --screen 
  --verbose
  --dryrun
  --nograb
  --prop or --properties
  --fb x
  --fbmm x
  --dpi /
  --output 
  --auto
  --mode 
  --preferred
  --pos x
  --rate  or --refresh 
  --reflect normal,x,y,xy
  --rotate normal,inverted,left,right
  --left-of 
  --right-of 
  --above 
  --below 
  --same-as 
  --set  
  --scale x
  --transform 
  --off
  --crtc 
  --panning 
x[++[/x++[]]]

  --gamma ::
  --primary
  --noprimary
  --newmode  
   
   
[+HSync] [-HSync] [+VSync] [-VSync]
  --rmmode 
  --addmode  
  --delmode  

"xrandr --output X --refresh" produces similar output.

David


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Re: wheezy still missing php5-suhosin

Hi Bob,

On 11/04/2013 3:26 AM, Bob Proulx wrote:
> Andrew McGlashan wrote:
>> Now, php5-suhosin provides some real protection against programming
>> problems that could very easily exist and it is not uncommon to see
>> messages from Debian stable installs reporting bugs / vulnerabilities
>> detected by suhosin
> 
> The question isn't whether the suhosin patch did good with older PHP
> versions.  The question is whether newer PHP versions benefit as much
> from it.  Because in recent years AIUI many of the features of suhosin
> were merged into the mainline PHP.  And supporting suhosin isn't easy.
> At least some other distros have also stopped supporting it too.

I understand that Ubuntu have 12.10 locked in on 5.3.9 because of lack
of Suhosin patch / support.  Don't know what later Ubuntu will be doing.

>> Will php5-suhosin be re-instated any time soon?  And if not, what
>> measures can we take to protect Wheezy servers now?
> 
> Here is a good place to read up on the current state of PHP plus
> suhosin in Debian.
> 
>   http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=657698
> 
> It is a long thread with a lot of references to research.  Grab a
> comfortable chair and a stimulating beverage.

Great, thank you very much for your post and the reference.

To cut a long story short, if PHP upstream has incorporated the features
of Suhosin, then we should be fine; is it the final conclusion from that
long thread and all the references from it, that we are in good shape
with 5.4.4 -- better than pre 5.4 with Suhosin?

Thanks.
AndrewM

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Re (2): A home directory on removeable storage ...

2013-04-10 Thread peasthope

From:   Martin Steigerwald 
Date:   Wed, 10 Apr 2013 19:23:01 +0200
> If you mount a new filesystem onto an mount point of an already mounted 
> filesystem, ...

Please review my original posting.

Thanks,  ... Peter E.

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Re (2): A home directory on removeable storage ...

2013-04-10 Thread peasthope

From:   Darac Marjal 
Date:   Wed, 10 Apr 2013 16:32:18 +0100
> I'm not sure how you'd access the original /home/peter once you'd
> mounted the removable home on top of it, ...

The removeable shouldn't be mounted over the non-removeable. 
First unmount the non-removeable and mount it on /home/peter1, 
for example.  Then mount the removeable on /home/peter.

> Is pam_mount of any use to you? It's intended for mounting home
> directories on login.

The remount-followed-by-mount should be independent of login.  
Similarly, if the removeable storage is removed, then the 
non-removeable filesystem should be moved back to /home/peter, 
for example.  Anything for mounting specifically at login does not 
appear to be appropriate.  I imagine a script invoked by udev where 
insertion of storage triggers remount-followed-by-mount and 
removal triggers the remount.  

Thanks,  ... Peter E.

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Re: which operation leads to the close all opening terminals

2013-04-10 Thread Dan Ritter

On Thu, Apr 11, 2013 at 12:01:33AM +0800, lina wrote:
> Hi,
> 
> Right now, I have three or four terminals open, with 1 to 5 tabs in each
> terminal, most are ssh out.
> 
> In one terminal, I typed "more "
> 
> just one blink, all those terminal-emulators gone.
> 
> It's my first time meet this issue.
> 
> So I wonder which may lead to this episode?
> 

Without data, we can only speculate. Here's my wild speculation:

You thought you had multiple terminals open, but what you had
was a single master process with multiple sub-processes. A
failure of some kind happened in the master process and when it
died, it took all the children with it.

-dsr-

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Re: RAID 6 mdadm

2013-04-10 Thread Dexter Filmore

Am Wednesday 10 April 2013 18:05:08 schrieb Ross Boylan:
> >
> > You cannot get more than about 200MB/s out of a RAID1 setup, not even
> > with
> > 15krpm SAS drives. the RAID1 will never be faster than a single disk.
> > How
> > would it.
>
> It can read faster than a single disk by combining reads from different
> sectors on different disks.  I think your assertion is incorrect for
> reading, though  not for writing.
>
> Ross Boylan

Then dm would have to manage/combine the reads from the involved disks.
I do not know better, but I doubt this is done. 
I'll ask the raid list for curiousity's sake.

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Re: wheezy still missing php5-suhosin

Andrew McGlashan wrote:
> Now, php5-suhosin provides some real protection against programming
> problems that could very easily exist and it is not uncommon to see
> messages from Debian stable installs reporting bugs / vulnerabilities
> detected by suhosin

The question isn't whether the suhosin patch did good with older PHP
versions.  The question is whether newer PHP versions benefit as much
from it.  Because in recent years AIUI many of the features of suhosin
were merged into the mainline PHP.  And supporting suhosin isn't easy.
At least some other distros have also stopped supporting it too.

> Will php5-suhosin be re-instated any time soon?  And if not, what
> measures can we take to protect Wheezy servers now?

Here is a good place to read up on the current state of PHP plus
suhosin in Debian.

  http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=657698

It is a long thread with a lot of references to research.  Grab a
comfortable chair and a stimulating beverage.

Bob

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Re: which operation leads to the close all opening terminals

2013-04-10 Thread Martin Steigerwald

Am Mittwoch, 10. April 2013 schrieb Benjamin Egner:
> On 04/10/2013 06:01 PM, lina wrote:
> > Hi,
> > 
> > Right now, I have three or four terminals open, with 1 to 5 tabs in
> > each terminal, most are ssh out.
> > 
> > In one terminal, I typed "more "
> > 
> > just one blink, all those terminal-emulators gone.
> > 
> > It's my first time meet this issue.
> > 
> > So I wonder which may lead to this episode?
> > 
> > Thanks,
> > 
> > Best regards,
> > 
> > 
> > $ dpkg --get-selections | grep termin
> > gnome-terminal  install
> > gnome-terminal-data install
> > terminal.appinstall
> 
> Imho, the geeks are interested in the output of `dmesg' and the contents
> of `/var/log/syslog'.
> The closer in time to the incident, the better.

I´d also be interested in ~/.xsession-errors by the time of the incident.

Ciao,
-- 
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GPG: 03B0 0D6C 0040 0710 4AFA  B82F 991B EAAC A599 84C7


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Re: A home directory on removeable storage ...

2013-04-10 Thread Martin Steigerwald

Am Mittwoch, 10. April 2013 schrieb peasth...@shaw.ca:
> ... is possible.  I understand the concept of mounting
> the filesystem.
> 
> Additionally there can be a backup home directory which
> stays with the machine, on a hdd for example.  I imagine
> that when the machine powers up without the removeable
> storage, the backup home directory is instated.  When
> the removeable storage is connected, the backup is
> remounted as another directory in /home and the removeable
> is mounted as the home.
> 
> So for example, without the removeable present /home/peter
> is on the hdd.  With the removeable present, /home/peter
> is on that and the hdd is /home/peter.bak with the same
> ownership and privilages as /home/peter.  With udev, it
> might be accomplished with one or two scripts.
> 
> This can't be an original idea.  Is it available?

If you mount a new filesystem onto an mount point of an already mounted 
filesystem, processes which have their current working directory within the 
mount point will not recognize the change. The Linux kernel doesn´t take the 
original filesystem away from these processes unless the change their 
directory to outside of the mount point and then inside of it again.

Ciao,
-- 
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Re: which operation leads to the close all opening terminals

2013-04-10 Thread Benjamin Egner


On 04/10/2013 06:01 PM, lina wrote:

Hi,

Right now, I have three or four terminals open, with 1 to 5 tabs in each
terminal, most are ssh out.

In one terminal, I typed "more "

just one blink, all those terminal-emulators gone.

It's my first time meet this issue.

So I wonder which may lead to this episode?

Thanks,

Best regards,


$ dpkg --get-selections | grep termin
gnome-terminal  install
gnome-terminal-data install
terminal.appinstall



   
Imho, the geeks are interested in the output of `dmesg' and the contents 
of `/var/log/syslog'.

The closer in time to the incident, the better.


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Re: RAID 6 mdadm

2013-04-10 Thread Ross Boylan

On Wed, 2013-04-10 at 17:57 +0200, Dexter Filmore wrote:
> Am Wednesday 10 April 2013 17:21:35 schrieb Muhammad Yousuf Khan:
> > exactly, i am using RAID 1 with mdadm and not more then 230 or 300MB
> > throughput.  and the people are harnessing 4GB so this is the point
> where i
> > am confused
> 
> You cannot get more than about 200MB/s out of a RAID1 setup, not even
> with 
> 15krpm SAS drives. the RAID1 will never be faster than a single disk.
> How 
> would it.
It can read faster than a single disk by combining reads from different
sectors on different disks.  I think your assertion is incorrect for
reading, though  not for writing.

Ross Boylan


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which operation leads to the close all opening terminals

Hi,

Right now, I have three or four terminals open, with 1 to 5 tabs in each
terminal, most are ssh out.

In one terminal, I typed "more "

just one blink, all those terminal-emulators gone.

It's my first time meet this issue.

So I wonder which may lead to this episode?

Thanks,

Best regards,


$ dpkg --get-selections | grep termin
gnome-terminal  install
gnome-terminal-data install
terminal.appinstall



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Re: RAID 6 mdadm

2013-04-10 Thread Dexter Filmore

Am Wednesday 10 April 2013 17:21:35 schrieb Muhammad Yousuf Khan:
> exactly, i am using RAID 1 with mdadm and not more then 230 or 300MB
> throughput.  and the people are harnessing 4GB so this is the point where i
> am confused

You cannot get more than about 200MB/s out of a RAID1 setup, not even with 
15krpm SAS drives. the RAID1 will never be faster than a single disk. How 
would it.

If you want to saturate 4G*bit* ethernet (gigaBIT! not byte!) which comes down 
to 500MB/s raw across all interfaces, so 125MB/s on one nic you definetly do 
*not* want linux softraid 6. either patch up the kernel with ZFS or if you 
wanna cross the t's and dot the i's: get a HP Proliant N40L, put a 
KVR1333D3E9SK2/16G 2x8GB ECC mem kit in it, install FreeNAS, add 4 7k2 rpm 
drives of your choice and create a z-raid over it, you should see 400MB/s.
Has 2 slots, on pcie16x, one 1x so should take a 4xGBE card and there you go.
Due to the massive caching and whatnot zraid uses and hence the amount of data 
in the 16GB make sure it's UPS backed. So far we're looking at roundabout 450 
USD without disks and UPS, but you'll have one heck of a NAS.

Now, *this* totally is not debian anymore, so back on topic:

I have a 5x1500GB raid5 from 72krpm sata drives and without optimizations, 
LVM2 and xfs on top of it get about 80MB/s write speed. raid6 probably would 
slow to a crawl (platform is a core i5 quad @2.3GHz)

>
> On Wed, Apr 10, 2013 at 7:38 PM, Gary Dale  wrote:
> > On 10/04/13 10:15 AM, Muhammad Yousuf Khan wrote:
> >> i was watch a person's video regarding RAID 6 with mdadm
> >> his configuration was very low, some old system probably
> >> 2GB RAM, 3x8TB Hard Drives, 4port Ethernet card for channeling.

There is no such thing as a 8TB hard drive in the year 2013

> >> and the guy was giving review of his home server. he says he will
> >> channel the 4 port Ethernet to achive 4Gbps network throughput. and 2
> >> drive redundancy with RAID6.

...maybe 8x3TB rahter with 2 spares?

> >>
> >> my question is
> >> since i can not invest that huge money for testing so just asking from
> >> experience users. isn't it going to be a problem because of bottleneck
> >> and limited throughput of SATA 7200 rpm 3TB drives?
> >>
> >> actually what i need is 4GB LAN throughput with teaming (802.3ad) for
> >> data storage to backup VMs and same huge data manipulations will be
> >> done. so just confused if it going to work or not.

VM storage: make that N40L FreeNAS a N54L and use block dedup. Cost more, but 
worth it.

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Re: A home directory on removeable storage ...

2013-04-10 Thread Darac Marjal

On Wed, Apr 10, 2013 at 08:23:03AM -0800, peasth...@shaw.ca wrote:
> ... is possible.  I understand the concept of mounting 
> the filesystem.  
> 
> Additionally there can be a backup home directory which 
> stays with the machine, on a hdd for example.  I imagine 
> that when the machine powers up without the removeable 
> storage, the backup home directory is instated.  When 
> the removeable storage is connected, the backup is 
> remounted as another directory in /home and the removeable 
> is mounted as the home.  
> 
> So for example, without the removeable present /home/peter 
> is on the hdd.  With the removeable present, /home/peter 
> is on that and the hdd is /home/peter.bak with the same 
> ownership and privilages as /home/peter.  With udev, it 
> might be accomplished with one or two scripts.
> 
> This can't be an original idea.  Is it available?

Is pam_mount of any use to you? It's intended for mounting home
directories on login.

I'm not sure how you'd access the original /home/peter once you'd
mounted the removable home on top of it, though. Someone will know how,
though.



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A home directory on removeable storage ...

2013-04-10 Thread peasthope

... is possible.  I understand the concept of mounting 
the filesystem.  

Additionally there can be a backup home directory which 
stays with the machine, on a hdd for example.  I imagine 
that when the machine powers up without the removeable 
storage, the backup home directory is instated.  When 
the removeable storage is connected, the backup is 
remounted as another directory in /home and the removeable 
is mounted as the home.  

So for example, without the removeable present /home/peter 
is on the hdd.  With the removeable present, /home/peter 
is on that and the hdd is /home/peter.bak with the same 
ownership and privilages as /home/peter.  With udev, it 
might be accomplished with one or two scripts.

This can't be an original idea.  Is it available?

Thanks,... Peter E.




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Re: RAID 6 mdadm

2013-04-10 Thread Muhammad Yousuf Khan

exactly, i am using RAID 1 with mdadm and not more then 230 or 300MB
throughput.  and the people are harnessing 4GB so this is the point where i
am confused


On Wed, Apr 10, 2013 at 7:38 PM, Gary Dale  wrote:

> On 10/04/13 10:15 AM, Muhammad Yousuf Khan wrote:
>
>> i was watch a person's video regarding RAID 6 with mdadm
>> his configuration was very low, some old system probably
>> 2GB RAM, 3x8TB Hard Drives, 4port Ethernet card for channeling.
>> and the guy was giving review of his home server. he says he will channel
>> the 4 port Ethernet to achive 4Gbps network throughput. and 2 drive
>> redundancy with RAID6.
>>
>> my question is
>> since i can not invest that huge money for testing so just asking from
>> experience users. isn't it going to be a problem because of bottleneck and
>> limited throughput of SATA 7200 rpm 3TB drives?
>>
>> actually what i need is 4GB LAN throughput with teaming (802.3ad) for
>> data storage to backup VMs and same huge data manipulations will be done.
>> so just confused if it going to work or not.
>>
>> Thanks,
>> MYK
>>
>>
> That's an odd setup. Why use RAID6 with only 3 drives? He'd get better
> performance with RAID1 with only 3 drives.
>
> However, your question is about performance. My RAID5 array with SATA 2
> drives gets about 200MBps. SATA 3 performance should be double that.
>
> Caching is critical. Disk access is dramatically slower than memory access
> so that your real throughput will depend on how much disk access can be
> avoided or optimized.
>
>
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Re: debian-6.0.7-amd64 how to set resolution and refresh for free NVIDIA X drivers?

2013-04-10 Thread Sven Joachim

On 2013-04-10 16:46 +0200, Jonathan Dowland wrote:

> Since you are willing and able to reinstall from scratch, it may be worth
> trying the next release of Debian, currently considered 'testing', known
> as 'wheezy'. You can get wheezy Release Candidate 1 release installation
> media from here:
>
> 
>
> Wheezy is to be released imminently, so it should not be significantly more
> unstable to use than you would expect from a stable release. However it is
> much newer than squeeze, and the open source nouveau driver has been under
> rapid development, so the version in wheezy is likely to have a much larger
> set of supported cards, and many bugs squashed compared to squeeze.

While this is true in general, there are many known issues with David's
card (GeForce 6150), and I would not recommend to use it with Nouveau.

Cheers,
   Sven


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Re: debian-6.0.7-amd64 how to set resolution and refresh for free NVIDIA X drivers?

Le Mer 10 avril 2013 16:43, Jonathan Dowland a écrit :
> On Wed, Apr 10, 2013 at 11:49:14AM +0200, "Morel Bérenger" wrote:
>
>> [Nouveau]'s not still not working like a charm, since I tried kernel
>> 3.8 to
>> try a game (regnum online, bugged as hell, but at least it have a linux
>> client which is playable) which perfectly works with official NVidia.
>> The
>> result with nouveau of 3.8 was only a black screen (for 3.2 the game
>> simply said that some features were lacking and closed).
>
> For *you*, which does not mean that this is the experience for
> *everyone*.
> Therefore there's no reason to try and discourage *anyone else* from using
>  Nouveau, unless you know categorically what in particular about your
> setup is to blame for your troubles (e.g. a specific video card), and the
> person you are discouraging has the same setup.

> On Wed, Apr 10, 2013 at 11:49:14AM +0200, "Morel Bérenger" wrote:
>> Of course, those features which are lacking are only for special cases,
>> and for all other stuff, nouveau is really good, my intent is not to deny
>> that fact, and I am waiting impatiently to see the 3.8 kernel in debian
>> testing, to get rid of that piece of crap named nvidia drivers, which only
>> give me problems and the ability to play one or two games I could not
>> otherwise play

This other part of my message was also explaining that it depends on the
needs of the person which want to try it.
The cases were it currently does not fit the needs of people is when heavy
3D acceleration, optimius support, or dynamic fan speed depending on
temperature is needed.
In other situations, I have not said it was not a good idea, did I?
I also said that the kernel 3.8 seems to have a fairly bettre version of
nouveau driver, which I was not able to test efficiently due to problems I
did not even tried to diagnose and fix.

I thought it was clear, but is sounds it was not, so I present my
apologies, and thanks you to have fixed my unclear words.


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RE: RAID 6 mdadm

2013-04-10 Thread shmick



> -Original Message-
> From: Gary Dale [mailto:garyd...@rogers.com]
> Sent: Thursday, 11 April 2013 12:39 AM
> To: debian
> Subject: Re: RAID 6 mdadm
> 
> On 10/04/13 10:15 AM, Muhammad Yousuf Khan wrote:
> > i was watch a person's video regarding RAID 6 with mdadm
> > his configuration was very low, some old system probably
> > 2GB RAM, 3x8TB Hard Drives, 4port Ethernet card for channeling.
> > and the guy was giving review of his home server. he says he will
> > channel the 4 port Ethernet to achive 4Gbps network throughput. and 2
> > drive redundancy with RAID6.
> >
> > my question is
> > since i can not invest that huge money for testing so just asking from
> > experience users. isn't it going to be a problem because of bottleneck
> > and limited throughput of SATA 7200 rpm 3TB drives?
> >
> > actually what i need is 4GB LAN throughput with teaming (802.3ad) for
> > data storage to backup VMs and same huge data manipulations will be
> > done. so just confused if it going to work or not.
> >
> > Thanks,
> > MYK
> >
> 
> That's an odd setup. Why use RAID6 with only 3 drives? He'd get better
> performance with RAID1 with only 3 drives.
> 
> However, your question is about performance. My RAID5 array with SATA 2
> drives gets about 200MBps. SATA 3 performance should be double that.
> 
> Caching is critical. Disk access is dramatically slower than memory
> access so that your real throughput will depend on how much disk access
> can be avoided or optimized.

This is really not debian related at all

>
> 
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Re: debian-6.0.7-amd64 how to set resolution and refresh for free NVIDIA X drivers?

On Tue, Apr 09, 2013 at 11:43:44PM +0200, Ralf Mardorf wrote:
> When opening your links they were not good formatted,

they are being sent (incorrectly) as content-type: text/html, so web browsers
will try to render them as HTML - but a simple tool like 'GET' is OK:

> $ GET 
> http://holgerdanske.com/users/dpchrist/bug-reports/debian/squeeze/amd64/X/a64x23800p-20130409-140018-xorg.conf.new


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Re: debian-6.0.7-amd64 how to set resolution and refresh for free NVIDIA X drivers?

On Tue, Apr 09, 2013 at 07:21:22PM +0200, Ralf Mardorf wrote:
> I recommend to use a more or less classical xorg.conf. I'm still using
> CRTs myself.
> 
> >From my current Ubuntu:

OP beware, please do not try something like Ralf's xorg.conf yourself.
For a start, it specifies the radeon driver; but it also declares modelines
that may not be appropriate to your monitor, which in extreme cases could
result in hardware damage, apparently.

Modern X should not require any xorg.conf at all, with all relevant information
automatically detected, and the goal here should be to get you to a desired
resolution without introducing one.

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Re: debian-6.0.7-amd64 how to set resolution and refresh for free NVIDIA X drivers?

David,

Since you are willing and able to reinstall from scratch, it may be worth
trying the next release of Debian, currently considered 'testing', known
as 'wheezy'. You can get wheezy Release Candidate 1 release installation
media from here:



Wheezy is to be released imminently, so it should not be significantly more
unstable to use than you would expect from a stable release. However it is
much newer than squeeze, and the open source nouveau driver has been under
rapid development, so the version in wheezy is likely to have a much larger
set of supported cards, and many bugs squashed compared to squeeze.

Once you've done that, if you could try attaching a Xorg.0.log that results
in running X *without an xorg.conf*, that may be useful too.

Cheers


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Re: debian-6.0.7-amd64 how to set resolution and refresh for free NVIDIA X drivers?

On Wed, Apr 10, 2013 at 11:49:14AM +0200, "Morel Bérenger" wrote:
> [Nouveau]'s not still not working like a charm, since I tried kernel 3.8 to
> try a game (regnum online, bugged as hell, but at least it have a linux
> client which is playable) which perfectly works with official NVidia. The
> result with nouveau of 3.8 was only a black screen (for 3.2 the game simply
> said that some features were lacking and closed).

For *you*, which does not mean that this is the experience for *everyone*.
Therefore there's no reason to try and discourage *anyone else* from using
Nouveau, unless you know categorically what in particular about your setup
is to blame for your troubles (e.g. a specific video card), and the person
you are discouraging has the same setup.

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Re: RAID 6 mdadm

2013-04-10 Thread Gary Dale


On 10/04/13 10:15 AM, Muhammad Yousuf Khan wrote:

i was watch a person's video regarding RAID 6 with mdadm
his configuration was very low, some old system probably
2GB RAM, 3x8TB Hard Drives, 4port Ethernet card for channeling.
and the guy was giving review of his home server. he says he will 
channel the 4 port Ethernet to achive 4Gbps network throughput. and 2 
drive redundancy with RAID6.


my question is
since i can not invest that huge money for testing so just asking from 
experience users. isn't it going to be a problem because of bottleneck 
and limited throughput of SATA 7200 rpm 3TB drives?


actually what i need is 4GB LAN throughput with teaming (802.3ad) for 
data storage to backup VMs and same huge data manipulations will be 
done. so just confused if it going to work or not.


Thanks,
MYK



That's an odd setup. Why use RAID6 with only 3 drives? He'd get better 
performance with RAID1 with only 3 drives.


However, your question is about performance. My RAID5 array with SATA 2 
drives gets about 200MBps. SATA 3 performance should be double that.


Caching is critical. Disk access is dramatically slower than memory 
access so that your real throughput will depend on how much disk access 
can be avoided or optimized.



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RAID 6 mdadm

2013-04-10 Thread Muhammad Yousuf Khan

i was watch a person's video regarding RAID 6 with mdadm
his configuration was very low, some old system probably
2GB RAM, 3x8TB Hard Drives, 4port Ethernet card for channeling.
and the guy was giving review of his home server. he says he will channel
the 4 port Ethernet to achive 4Gbps network throughput. and 2 drive
redundancy with RAID6.

my question is
since i can not invest that huge money for testing so just asking from
experience users. isn't it going to be a problem because of bottleneck and
limited throughput of SATA 7200 rpm 3TB drives?

actually what i need is 4GB LAN throughput with teaming (802.3ad) for data
storage to backup VMs and same huge data manipulations will be done. so
just confused if it going to work or not.

Thanks,
MYK

Re: debian-6.0.7-amd64 how to set resolution and refresh for free NVIDIA X drivers?

On Wed, 10 Apr 2013 14:25:59 +0200, Morel Bérenger  
 wrote:

Just one question: what is the link between audio stuff and graphic card?


One claim is, that shared memory could cause issues. I own a card with  
it's own memory and currently I use an onboard device, that does share RAM  
for frame buffer. I can't confirm this claim. Shared memory seemingly  
never caused issues for me.


Sometimes when getting xruns (audio glitches), they can go away when using  
another graphics or graphics driver.


Using proprietary drivers sometimes doesn't work with real-time patched  
kernels, regarding to licensing issues. There are workarounds to ignore  
the license, that often do not work. Instead of using a real-time kernl,  
it's possible to use a full preempted kernel and as boot option using  
"threadirqs", however, a real-time patched kernel still could be a little  
bit better than a full preempted and since the hardware registers aren't  
accessible directly by PCs, as it is possible for the C64, Atari ST, PC  
anyway don't have that good real-time abilities, so IMO it's better to use  
a rt-patched kernel.


Last but not least, as for all hardware, the graphics could share the IRQ  
with the sound device, fortunately modern kernels seem to ensure that the  
graphics get it's own IRQ.


On my machine 2 USB ports, the graphics and my sound card share IRQ 18.  
With modern kernels, the graphics gets another IRQ and I wrote a script to  
unbind the USB ports.


Regards,
Ralf


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Re: Fixing a half-configured package

2013-04-10 Thread Thilo Six

Hello Bob,


Excerpt from Bob Proulx:
--  --
> I will pull back to the safer higher level tool "dpkg-reconfigure"
> which runs the postinst scripts.
> 
>   root@junk:~# dpkg-reconfigure nfs-kernel-server
>   insserv: Service nfs-common has to be enabled to start service 
> nfs-kernel-server
>   insserv: exiting now!
>   update-rc.d: error: insserv rejected the script header
> 
> To fix it means enabling nfs-common to start.  This can be done with
> update-rc.d but the safe answer is to use dpkg-reconfigure and let it
> run the postinst script.  Here is the fix.
> 
>   root@junk:~# dpkg-reconfigure nfs-common
>   Stopping NFS common utilities: idmapd statd.
>   Starting NFS common utilities: statd idmapd.
>   root@junk:~# dpkg-reconfigure nfs-kernel-server
>   Stopping NFS kernel daemon: mountd nfsd.
>   Unexporting directories for NFS kernel daemon
>   Exporting directories for NFS kernel daemon
>   Starting NFS kernel daemon: nfsd mountd.
> 
> Bob

Thank you for your analysis of the problem. I did learn new things from that!

-- 
Regards,
Thilo

4096R/0xC70B1A8F
721B 1BA0 095C 1ABA 3FC6  7C18 89A4 A2A0 C70B 1A8F




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Re: Pioneer BDR-206 Internal Blu-Ray Disc DVD/CD writer and Debian

2013-04-10 Thread Thomas Schmitt

Hi,

> According to this[1] bug (found by searching the internet for "Merging data
> is impossible with this disc"), brasero doesn't support BluRay discs.
> [1]https://bugs.launchpad.net/ubuntu/+source/brasero/+bug/637379

Well, that bug seems somewhat outdated.
But of course, Debian packages are outdated too.
Maybe this bug is even too young for Brasero 2.30 as is
packaged in Debian 6.

Current Brasero source from git seems to have clue of BD media.

Other than xfburn, where BD media might work nevertheless,
because i cannot spot code for their rejection and because
libburn supports them in version 0.8.0 of Debian 6.


So there remains xorriso command line. Like

  xorriso -outdev /dev/sr0 -map ./my_disk_file /my_iso_file

which puts the file ./my_disk_file as /my_iso_file into a
ISO 9660 + Rock Ridge filesystem on the blank medium in /dev/sr0.
The BD-R medium will stay appendable, i.e. more files can be
added in further sessions until the medium is full.
For adding another session:

  xorriso -dev /dev/sr0 -map ./some_disk_directory /some_iso_directory

Good for about 300 sessions on the same BD-R. More than
one -map command can be used in one run to add multiple files
or directories. (Actually there are lots of commands available.)

This should work even with the frightening old xorriso-0.5.6 as
packaged for Debian 6.


After unfreezing of Debian, i hope for xorriso-tcltk to appear in
"testing". It is half way between GUI and command line :))
  http://www.gnu.org/software/xorriso/xorriso-tcltk-screen.gif


Have a nice day :)

Thomas


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Re: debian-6.0.7-amd64 how to set resolution and refresh for free NVIDIA X drivers?

Le Mer 10 avril 2013 12:02, Ralf Mardorf a écrit :
> Yes, AFAIK all your claims a correct! I needed the nv driver for a long
> time, because nouveau completely didn't work, today it can be possible (but
> it also still can be impossible) to use 3D and even to use the driver for
> real-time applications, even for cards that completely didn't work in the
> past. It's much better than it was a long time ago.
>
> At the moment I use my ATI, it seems to be less good supported than my
> NVIDIA. I switch the cards from time to time, regarding to unusual
> needs, in my case it's audio real-time.
>
> I still use xorg.conf, but it could be that xrandr does work as good as
> the xorg.conf does work.

The main interest of xrandr in my opinion is, that it is far easier to
play with than what I can easily name the ugly Xorg.conf.
Here are some examples:
_ user can configure his screen himself, no need to sudo or su
_ no need to restart anything, it's dynamic. You can
add/move/remove/resize screens without any problem at your will.
_ far easier to learn for a beginner: it took less than 10 minutes, while
Xorg.conf will require hours of web browsing. And web browsing without a
good resolution is a pain in...
_ if your multiple screens have different resolutions, there is no "ghost
space", so you can not loose your mouse cursor.
_ it have nice GUI interfaces (I do not use them, but I think it is a
power to have some) like lxrandr. So if you want a normal user to use it,
he will not need to learn anything :)

Considering that my 2 computers are some of the cheapest I know about (an
eeepc laptop and a desktop repaired multiple times with 2 different
screens, and one which will blow it's 10th candle this year, with its
1024x768 max resolution :D) this power of the randr extension is really
comfortable.

And nouveau supports all of this out of the box since at least 2 years,
unlike NVidia.

I think you should take a look at this
http://nouveau.freedesktop.org/wiki/FeatureMatrix if you want to have a
good viewing of were it is for your GPU.

Just one question: what is the link between audio stuff and graphic card?


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Re: sync apt/dpkg state between systems?

2013-04-10 Thread Thilo Six

Hello Bob,


Excerpt from Bob Proulx:

--  --
>> Let me tell you why i suggested etckeeper.
>> Here i use it to commit /etc into $VCS on a regularly basis. This helps me to
>> keep track of what is going on in /etc.
>> Being able to compare my modifications with the original is a feature you 
>> surely
>> will not miss anymore, after you get used to it.
> 
> This is where our strategy of attack on the problem is different.  I
> started from the idea that there are a lot of files in /etc but only a
> few of them need to be excluded from the restoration.  Therefore
> identify the files that should be excluded.  Then restore everything
> *except* for the files that should be excluded.  Whereas I think you
> were started from the idea that there a lot of files in /etc and only
> the known okay files to restore should be restored.  Identify the
> files that should be restored and only restore those files.
> 
> Basically one strategy is include all but those excluded and the other
> strategy is exclude all but those included.
> 
> I think we are in agreement that some files must be restored and some
> files must be excluded.  We differ on the technique to get there.

Excellent summary!
It is like positiv vs. negativ logic in bollean algebra. If you know the rules
with both you can reach your goal, just the way in between is different.


--  --
>> Dpkg::Options {
>> "--force-confdef";
>> "--force-confold";
>> "--force-confmiss";
>> }
>> credits for this go to: http://raphaelhertzog.com
> 
> That controls the behavior of dpkg when it would normally stop and
> interact with the user admin who is installing or upgrading a package
> about the handling of a conffile.  Should you install the new package
> file, keep the existing file, or merge them?  Or see the differences
> between them?  The above answers those questions globally so that it
> never stops to ask a question.
> 
> I fully agree with confmiss.  I routinely set that too.  But I have
> seen heated arguments from people who have argued (apparently
> successfully because the change went in) that removing a required /etc
> file is a desired configuration and that it must be preserved.
> (Regarding the /etc/network/interfaces file.)  This adds yet another
> logical state to be considered.
> 
> I use a system configuration management system similar to cfengine,
> puppet, chef that I have programmed to configure the system.  I have
> directed it to read-modify-write various configuration files to set
> them as desired.  In that type of environment it is advantageous to me
> to use confnew.  With confnew I will always get the package version of
> the file with the package default configuration.  Which will then
> immediately be reconfigured into my desired configuration by the
> system management tool.

I understand we do have a common understanding of handling such things.
As i do not have to administer a bulk of systems i differ in that i do not have
the need for an advanced configuration system as cfengine.
But apart from that my workflow to handle /etc is similar to yours.
With 'confold' dpkg by default keeps the configuration that is already in place
in production and installs new configurations from DMs as foo.dpkg-dist.
My VCS then notifies me about new or changed files and the i go through them and
merge them as i see fit.



--  --
>>>   * Exclude /etc/fstab
>>>   * Exclude /etc/lvm
>>>   * Exclude /etc/mdadm
>>
>> + /etc/initramfs-tools/conf.d/resume
> 
> Ha!  I always use lvm and so for me the names in the
> /etc/initramfs-tools/conf.d/resume file are always logical names and
> would be the same across systems.  But point taken.  If that is a UUID
> then it should be excluded from the restore.

here on my system it does:

$ grep -o 'RESUME=UUID=..' /etc/initramfs-tools/conf.d/resume
RESUME=UUID=7bb317c1-e


> Plus there is your note about ethernet addresses.  In addition to the
> 70-persistent-net.rules file that may also affect people using
> "guessnet" or other such networking packages.
> 
>> ..and maybe some more. This is why i would look into the difference prior to
>> rsyncing. After i had become confident i would use rsync, too.
> 
> At the center between the strategies of include and exclude is the
> need to identify which files must be included in the restoration and
> which files must be excluded.  Having that list then we would restore
> what should be included and avoid those that should be excluded.
> 
> I think you and I would both identify these files on-the-fly by seeing
> the files, by looking at the file contents, by other dynamic decision
> making.  But I fear that for many people that would be beyond their
> level of skill.  Our discussion shows that it isn't trivial.  It takes
> some experience.
> 
> Can we document what we have learned from this discussion?  Would
> someone be able to follow that documentation and successfully peform a
> restoration as described?  Is it possible to create a script that
> would a

Re: wheezy still missing php5-suhosin

2013-04-10 Thread Darac Marjal

On Wed, Apr 10, 2013 at 01:54:43PM +0200, "Morel Bérenger" wrote:
> Le Mer 10 avril 2013 12:36, Andrew McGlashan a écrit :
> > Will php5-suhosin be re-instated any time soon?
> 
> I have no clue about what instated means :)

https://en.wiktionary.org/wiki/reinstate



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Re: wheezy still missing php5-suhosin

Le Mer 10 avril 2013 12:36, Andrew McGlashan a écrit :
> Will php5-suhosin be re-instated any time soon?

I have no clue about what instated means :)

> And if not, what
> measures can we take to protect Wheezy servers now?

Maybe you can reuse the old package.
Check the dependencies, it is possible that there has been no changes in
them.
If there has been, take a look to applications' changelogs, to see if the
new versions are compatible with the existing dependencies.

As you might know, there is a more or less standard versioning scheme
named semantic versioning (it is quite easy to understand even for a
non-native english user like me. You can find it's description here:
http://semver.org/). If dependencies uses it, you will be able to check
compatibility quite quickly: if major number did not changed, then you are
fine.
Of course, since you are willing to use this tool on a production server,
I strongly encourage you to take a look into changelogs and/or ask to
their developers to ensure nothing should be broken.


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Re: text from serial port + IP camera + Debian for loss prevention?

2013-04-10 Thread Nick Lidakis

On Wed, Apr 10, 2013 at 06:28:44AM +0200, sp113438 wrote:
> > 
> > I know there is a program that records audio. It records several
> > seconds/minutes to memory and writes the interval to disk when a
> > button is hit.
> > I forgot it's name :-(
> > You need something similar, but for video.
> > 
> > 
> Timemachine is the program:
> 
> Timemachine writes the last 10 seconds of audio _before_ the button
> press and everything from now on up to the next button press into a
> WAV-file.
> 
> The idea is that you doodle away with whatever is kicking around in your
> studio and when you heard an interesting noise, you'd press record and
> capture it, without having to try and recreate it.

But I don't want to record just triggered events. The IP camera will be 
recording from
open to close. I'd like to archive the whole day's cash registers journal as
well. 

Integrating the two and searching based on triggers or text would be the key.
If I wanted to search "latte" the DVR would show me all the video footage of
lattes being rung up; same for when the No Sale key was hit.


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Re: text from serial port + IP camera + Debian for loss prevention?


Nick Lidakis wrote:

Forgive me if I'm not using the proper terminology or not explaining
this properly. This aspect of running a small business is foreign to me.

My wife and I run a small independent coffee shop and I'm the geek in
charge. I've got m0n0wall running great with the customer wifi on DMZ and
all our machines on a private LAN. We've got a recycled Pentium 4 running
Debian stable for our Music Player Daemon server. Motherboard is a Tyan
with real serial ports.

We have a mid-line Casio cash register setup that has 2 serial ports. 1
is dedicated to the credit card machine. The other can be connected to a
serial pole display. I understand that this second serial port outputs
formatted text of all buttons pressed and transactions processed.

This is also useful for overlaying this text with a CCTV camera connected
to a DVR. Though, this setup limits how you can search for mistakes or theft,
having to sift through hours of video.

I'd like to do the following with Debian: Use the text from the serial
port in conjunction with an IP network camera connected to our server. I'd
like to be able to search the text for particular triggers, e.g., look at
video whenever someone hits the NS (no sale) key to open the drawer.

I think I can connect the Casio to one of the serial ports on the server and
capture data through tty(?).

The text would not necessarily need to be overlayed but must sync with the 
video.
The Casio has a pretty accurate clock, running on 60Hz; the IP camera can
sync via NTP on our m0n0wall router.

I've Googled a few commercial solutions but they are very expensive and
are proprietary. One is this:
http://www.geovision.com.tw/english/Prod_GVDataV3E.asp

I'm thinking something like this must have been done with Linux for other
fields, e.g., scientific sensors outputting text on a live stream.

Any ideas or suggestions?


A keyword is "framegrabber" or "frame grabber" {note 
alternative spellings}.


www.google.com/search?q="frame+grabber"+linux  and 
www.google.com/search?q="framegrabber"+linux


give a different mix of results. Browsing the links may 
provide ideas. HTH




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wheezy still missing php5-suhosin

Hi,

I'm working on a server replacement, the old (current) server is running
latest stable release and the new server is running from this downloaded
installer ISO:

   debian-wheezy-DI-rc1-amd64-netinst.iso


Now, php5-suhosin provides some real protection against programming
problems that could very easily exist and it is not uncommon to see
messages from Debian stable installs reporting bugs / vulnerabilities
detected by suhosin

It seems to me that this is an essential package for most servers
running PHP5 and it's non-availability is a very serious concern.


I've found the following:

http://packages.qa.debian.org/p/php-suhosin/news/20120320T163911Z.html


Will php5-suhosin be re-instated any time soon?  And if not, what
measures can we take to protect Wheezy servers now?


Thanks
AndrewM



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Re: debian-6.0.7-amd64 how to set resolution and refresh for free NVIDIA X drivers?

Yes, AFAIK all your claims a correct! I needed the nv driver for a long
time, because nouveau completely didn't work, today it can be possible
(but it also still can be impossible) to use 3D and even to use the
driver for real-time applications, even for cards that completely didn't
work in the past. It's much better than it was a long time ago.

At the moment I use my ATI, it seems to be less good supported than my
NVIDIA. I switch the cards from time to time, regarding to unusual
needs, in my case it's audio real-time.

I still use xorg.conf, but it could be that xrandr does work as good as
the xorg.conf does work.


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Re: debian-6.0.7-amd64 how to set resolution and refresh for free NVIDIA X drivers?

Le Mer 10 avril 2013 11:28, Ralf Mardorf a écrit :
> On Wed, 2013-04-10 at 10:51 +0200, "Morel BÃ©renger" wrote:
>
>> In last kernels (around 3.8), it seems that there is also support for
>> better 3D acceleration
>
> Nouveau was a PITA for a long time, but nowadays it usually works like a
> charm, 3D acceleration is very good.

It is not still not working like a charm, since I tried kernel 3.8 to try
a game (regnum online, bugged as hell, but at least it have a linux client
which is playable) which perfectly works with official NVidia. The result
with nouveau of 3.8 was only a black screen (for 3.2 the game simply said
that some features were lacking and closed).

Another problem I know by following linuxfr, is that automatic adjustment
of fan speed according to temperature is not functional. At least,
according to a guy who claimed to be a contributor of nouveau :) (I did
not checked his assertions, I have other things to do than mistrust people
which give fairly good technical explanations and are recognized by more
ancient people of the community than me)

There is still a lack of support for dual card configuration (I have such
configuration, but I do not use it anyway: my two cards are just cheap
ones and the second were bought after an error of mine about which
component of my computer was out of order...) and IIRC card switching that
we can find in some portable computers.

Of course, those features which are lacking are only for special cases,
and for all other stuff, nouveau is really good, my intent is not to deny
that fact, and I am waiting impatiently to see the 3.8 kernel in debian
testing, to get rid of that piece of crap named nvidia drivers, which only
give me problems and the ability to play one or two games I could not
otherwise play (nexuiz is still unplayable with nouveau 3.2 too, but it's
engine really became a PITA in performance point of view).

Wesnoth, unvanquished, openmw and so many other which have a free engine
works like a charm (on the graphic point of view, since I have real
problems with unvanquished, which I should try to solve, one day, because
this game is a really good -and different than average FPS- one).

Anyway, nouveau have always (since I know it, so, not so many time, maybe
2 years :D) be the best when you have no need for 3D features.
And now, 3D features are coming, so, I will profit from that message to
say "Good job, guys, and thanks you a lot!" to it's developers.

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Re: debian-6.0.7-amd64 how to set resolution and refresh for free NVIDIA X drivers?

On Wed, 2013-04-10 at 10:51 +0200, "Morel Bérenger" wrote:
> In last kernels (around 3.8), it seems that there is also support for
> better 3D acceleration

Nouveau was a PITA for a long time, but nowadays it usually works like a
charm, 3D acceleration is very good.

> xrandr

As mentioned by me in a previous post. You might need a modeline  and
you can get the needed values by

The command "cvt , e.g.:

cvt 1152 864 90

Regards,
Ralf

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I'm working for human rights and childcare, one of my latest jobs was
working 1 year with children from more than 40 nations. Many of them
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Everybody who calls me a racist, please send me a list with Islamic
nations that care for human rights.

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Re: Pioneer BDR-206 Internal Blu-Ray Disc DVD/CD writer and Debian

2013-04-10 Thread Darac Marjal

On Tue, Apr 09, 2013 at 01:54:37PM -0700, David Christensen wrote:
> On 04/03/13 22:05, David Christensen wrote:
> >I looks like it's time for a backup/ wipe/ reinstall cycle.
> 
[cut]
> 
> 9.  Another pop-up appears "Error while burning.  Merging of data is
> impossible with this disc".  I click "Save log" (see below).
> 
> Any suggestions?
> 
> TIA,
> 
> David
> 
> $ cat brasero-session.log
> Checking session consistency (brasero_burn_check_session_consistency
> brasero-burn.c:1741)
> Session error : Merging data is impossible with this disc
> (brasero_burn_record brasero-burn.c:2839)

According to this[1] bug (found by searching the internet for "Merging data
is impossible with this disc"), brasero doesn't support BluRay discs.

[1]https://bugs.launchpad.net/ubuntu/+source/brasero/+bug/637379



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Re: debian-6.0.7-amd64 how to set resolution and refresh for free NVIDIA X drivers?