[CentOS] how does the bootup screen move the cursor around?

[Frank Cox]

While rebooting my computer after installing the new kernel a few
minutes ago, I got to wondering about how the initial bootup screen
(after grub, before rhgb) is constructed.

The "Loading kernel blah blah blah" lines start at the top of the screen
and proceed to scroll down as one would expect.

But "kernel alive" shows up at the bottom of the screen and then more
write-up is printed above it.

My question is, how does that happen?  Does it write its own esc codes
directly to the screen?  If so, how does it know what terminal we're
using and, therefore, what esc codes to send?

Further into the boot sequence something like ncurses could do the heavy
lifting, but I don't think we're that far along yet.
-- 
MELVILLE THEATRE ~ Melville Sask ~ http://www.melvilletheatre.com

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Re: [CentOS] Multipath and iSCSI Targets

[Ross Walker]

On Mar 19, 2010, at 11:12 AM, "nate"  wrote:

> Joseph L. Casale wrote:
>> Just started messing with multipath against an iSCSI target with 4  
>> nics.
>> What should one expect as behavior when paths start failing? My lab  
>> setup
>> was copying some data on a mounted block device when I dropped 3 of  
>> 4 paths
>> and the responsiveness of the server completely tanked for several  
>> minutes.
>>
>> Is that still expected?
>
> Depends on the target and the setup, ideally if you have 4 NICs you
> should be using at least two different VLANs, and since you have 4  
> NICs
> (I assume for iSCSI only) you should use jumbo frames.

Jumbo frames should only be used if your CPU can't keep up with the  
load of 4 NICs otherwise it does add some latency to iSCSI.


> With my current 3PAR storage arrays and my iSCSI targets each system
> has 4 targets but usually 1 NIC, my last company(same kind of storage)
> I had 4 targets and 2 dedicated NICs(each on it's own VLAN for routing
> purposes and jumbo frames).
>
> In all cases MPIO was configured for round robin, and failed over
> in a matter of seconds.
>
> Failing BACK can take some time depending on how long the path was
> down for, at least on CentOS 4.x (not sure on 5.x) there was some
> hard coded timeouts in the iSCSI system that could delay path
> restoration for a  minute or more because there was a somewhat
> exponential back off timer for retries, this caused me a big
> headache at one point doing a software upgrade on our storage array
> which will automatically roll itself back if all of the hosts do
> not re-login to the array within ~60 seconds of the controller coming
> back online.
>
> If your iSCSI storage system is using active/passive controllers
> that may increase fail over and fail back times and complicate
> stuff, my arrays are all active-active.

I would check the dm-multipath comfig for how it handles errors, it  
might retry multiple times before marking a path bad.

That will slow things to a crawl.

-Ross

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Re: [CentOS] vim how to set colorscheme murphy

[MHR]

On Thu, Mar 18, 2010 at 10:14 PM, Agnello George
 wrote:
>
> sorry i got it solved , i created a /root/.vimrc  and added colorscheme
> murphy to it .

That solves the problem only for your root user.  You need it in a
.vimrc for each user affected, or put it into /etc/vimrc for all users
(which you will then have to keep updated).

mhr
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Re: [CentOS] [OT] Small touch screens that works with CentOS

[Dale Dellutri]

On Fri, Mar 19, 2010 at 6:44 AM, Pascal Robert  wrote:

> Hi,
>
> We want to display on a small LCD screen next to our meeting rooms and
> optionally let people book the room from the panel. We looked at different
> providers and those solutions either works with Exchange or Lotus Notes...
>
> Since I already have code to fetch events from any CalDAV/WebDSV servers,
> I'm looking at building the system myself. So I'm wondering if any of you
> can recommend small LCD screen that works well with Linux (the app would be
> a full screen Web app, browser have to be Gecko or WebKit based), and even
> better if the screen can have « touch buttons » (so that people don't have
> to use a physical keyboard to book the room), that's even better. I guess my
> other option would be a iPad.
>

The following page lists touchscreen laptops and add-on touchscreens:

  http://tuxmobil.org/touch_laptops.html

including Magic Touch which claims Linux compatibility.

And supposedly Freescale will soon ship its 7" touchscreen tablet.

-- 
Dale Dellutri
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[CentOS] CentOS-announce Digest, Vol 61, Issue 7

[centos-announce-request]

Send CentOS-announce mailing list submissions to
centos-annou...@centos.org

To subscribe or unsubscribe via the World Wide Web, visit
http://lists.centos.org/mailman/listinfo/centos-announce
or, via email, send a message with subject or body 'help' to
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You can reach the person managing the list at
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When replying, please edit your Subject line so it is more specific
than "Re: Contents of CentOS-announce digest..."


Today's Topics:

   1. CESA-2010:0147 Important CentOS 5 x86_64 kernel   Update
  (Karanbir Singh)
   2. CESA-2010:0147 Important CentOS 5 i386 kernel Update
  (Karanbir Singh)


--

Message: 1
Date: Thu, 18 Mar 2010 10:55:13 +
From: Karanbir Singh 
Subject: [CentOS-announce] CESA-2010:0147 Important CentOS 5 x86_64
kernel  Update
To: centos-annou...@centos.org
Message-ID: <20100318105513.ga17...@chakra.karan.org>
Content-Type: text/plain; charset=us-ascii


CentOS Errata and Security Advisory 2010:0147 Important

Upstream details at : http://rhn.redhat.com/errata/RHSA-2010-0147.html

The following updated files have been uploaded and are currently 
syncing to the mirrors: ( md5sum Filename ) 

x86_64:
aeda78a613ee85e01ab3a64454499db8  kernel-2.6.18-164.15.1.el5.x86_64.rpm
a82b99c27c0d0c471298616213f310e4  kernel-debug-2.6.18-164.15.1.el5.x86_64.rpm
33a2a49913c49802b3aa062d9b1d0f8f  
kernel-debug-devel-2.6.18-164.15.1.el5.x86_64.rpm
46bfd02d80d434afc2bf60307507bd54  kernel-devel-2.6.18-164.15.1.el5.x86_64.rpm
a60d8a90d69b7b2573c61851ccdd3e68  kernel-doc-2.6.18-164.15.1.el5.noarch.rpm
53b6cdddc47046e16e49ad96f1ceaea8  kernel-headers-2.6.18-164.15.1.el5.x86_64.rpm
0819b7ea1d6229b59d72d4fdf4d82856  kernel-xen-2.6.18-164.15.1.el5.x86_64.rpm
ec982d2eeefd7c5737b0fcca34f5679f  
kernel-xen-devel-2.6.18-164.15.1.el5.x86_64.rpm

Source:
2579b11b91a1247274b6bcc196cf6c55  kernel-2.6.18-164.15.1.el5.src.rpm


-- 
Karanbir Singh
CentOS Project { http://www.centos.org/ }
irc: z00dax, #cen...@irc.freenode.net



--

Message: 2
Date: Thu, 18 Mar 2010 10:55:12 +
From: Karanbir Singh 
Subject: [CentOS-announce] CESA-2010:0147 Important CentOS 5 i386
kernel  Update
To: centos-annou...@centos.org
Message-ID: <20100318105512.ga17...@chakra.karan.org>
Content-Type: text/plain; charset=us-ascii


CentOS Errata and Security Advisory 2010:0147 Important

Upstream details at : http://rhn.redhat.com/errata/RHSA-2010-0147.html

The following updated files have been uploaded and are currently 
syncing to the mirrors: ( md5sum Filename ) 

i386:
a7f6c97307a39de6bfd8fdfe30afba6b  kernel-2.6.18-164.15.1.el5.i686.rpm
f7698000b19b6ee495eefc097123b793  kernel-debug-2.6.18-164.15.1.el5.i686.rpm
7271e3a4b8b647e54aad3451746e9912  
kernel-debug-devel-2.6.18-164.15.1.el5.i686.rpm
cf2c2f55ca5a32eac2c9f0953a499349  kernel-devel-2.6.18-164.15.1.el5.i686.rpm
82cf1a9c247ebc5c114e93c3939ae5aa  kernel-doc-2.6.18-164.15.1.el5.noarch.rpm
0a41257eb16ab5b3b52d9b54677cf451  kernel-headers-2.6.18-164.15.1.el5.i386.rpm
b8f1e3626c0eb5a2d2f01f1192ddcb4b  kernel-PAE-2.6.18-164.15.1.el5.i686.rpm
c0ba83feb49acae2fdb5b4e8ebbe5743  kernel-PAE-devel-2.6.18-164.15.1.el5.i686.rpm
182bcc0117730434693ceb38b43d5fa4  kernel-xen-2.6.18-164.15.1.el5.i686.rpm
d2110406c7b01ddb86e1f3f66f394be4  kernel-xen-devel-2.6.18-164.15.1.el5.i686.rpm

Source:
2579b11b91a1247274b6bcc196cf6c55  kernel-2.6.18-164.15.1.el5.src.rpm


-- 
Karanbir Singh
CentOS Project { http://www.centos.org/ }
irc: z00dax, #cen...@irc.freenode.net



--

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End of CentOS-announce Digest, Vol 61, Issue 7
**
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Re: [CentOS] [OT] Small touch screens that works with CentOS

[Bob Beers]

On Fri, Mar 19, 2010 at 11:26 AM, Jay Leafey  wrote:
>
> On Fri, March 19, 2010 06:44, Pascal Robert wrote:
>> Hi,
>>
>> We want to display on a small LCD screen next to our meeting rooms and
>> optionally let people book the room from the panel. We looked at different
>> providers and those solutions either works with Exchange or Lotus Notes...
>>
>> Since I already have code to fetch events from any CalDAV/WebDSV servers,
>> I'm looking at building the system myself. So I'm wondering if any of you
>> can recommend small LCD screen that works well with Linux (the app would
>> be a full screen Web app, browser have to be Gecko or WebKit based), and
>> even better if the screen can have « touch buttons » (so that people don't
>> have to use a physical keyboard to book the room), that's even better. I
>> guess my other option would be a iPad.
>>
>> --
>> Pascal Robert

IMO, this sounds like an ideal application for a rooted^h^h^h^h^h^h
re-purposed nook.

-- 
-Bob Beers
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Re: [CentOS] [OT] Small touch screens that works with CentOS

[Jay Leafey]

On Fri, March 19, 2010 06:44, Pascal Robert wrote:
> Hi,
>
> We want to display on a small LCD screen next to our meeting rooms and
> optionally let people book the room from the panel. We looked at different
> providers and those solutions either works with Exchange or Lotus Notes...
>
> Since I already have code to fetch events from any CalDAV/WebDSV servers,
> I'm looking at building the system myself. So I'm wondering if any of you
> can recommend small LCD screen that works well with Linux (the app would
> be a full screen Web app, browser have to be Gecko or WebKit based), and
> even better if the screen can have « touch buttons » (so that people don't
> have to use a physical keyboard to book the room), that's even better. I
> guess my other option would be a iPad.
>
> --
> Pascal Robert

I saw something on ThinkGeek that might suit your needs:

http://www.thinkgeek.com/computing/usb-gadgets/bfa3/

They have simple and touch screen models.  The monitor itself should be
usable in Linux (I've seen similar monitors used in Linux) but I don't
know about the touch screen.
-- 
Jay Leafey
Memphis, TN
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Re: [CentOS] Multipath and iSCSI Targets

[nate]

Joseph L. Casale wrote:
> Just started messing with multipath against an iSCSI target with 4 nics.
> What should one expect as behavior when paths start failing? My lab setup
> was copying some data on a mounted block device when I dropped 3 of 4 paths
> and the responsiveness of the server completely tanked for several minutes.
>
> Is that still expected?

Depends on the target and the setup, ideally if you have 4 NICs you
should be using at least two different VLANs, and since you have 4 NICs
(I assume for iSCSI only) you should use jumbo frames.

With my current 3PAR storage arrays and my iSCSI targets each system
has 4 targets but usually 1 NIC, my last company(same kind of storage)
I had 4 targets and 2 dedicated NICs(each on it's own VLAN for routing
purposes and jumbo frames).

In all cases MPIO was configured for round robin, and failed over
in a matter of seconds.

Failing BACK can take some time depending on how long the path was
down for, at least on CentOS 4.x (not sure on 5.x) there was some
hard coded timeouts in the iSCSI system that could delay path
restoration for a  minute or more because there was a somewhat
exponential back off timer for retries, this caused me a big
headache at one point doing a software upgrade on our storage array
which will automatically roll itself back if all of the hosts do
not re-login to the array within ~60 seconds of the controller coming
back online.

If your iSCSI storage system is using active/passive controllers
that may increase fail over and fail back times and complicate
stuff, my arrays are all active-active.

nate


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[CentOS] Multipath and iSCSI Targets

[Joseph L. Casale]

Just started messing with multipath against an iSCSI target with 4 nics.
What should one expect as behavior when paths start failing? My lab setup
was copying some data on a mounted block device when I dropped 3 of 4 paths
and the responsiveness of the server completely tanked for several minutes.

Is that still expected?

Thanks,
jlc
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Re: [CentOS] [OT] Small touch screens that works with CentOS

[ken]

You could screw an OpenMoko phone to the wall.  It has, not just a
Linux-compatible screen, but the whole Linux OS on it.




-- 
Find research and analysis on US healthcare, health insurance,
and health policy at: 


On 03/19/2010 07:44 AM Pascal Robert wrote:
> Hi,
> 
> We want to display on a small LCD screen next to our meeting rooms
> and optionally let people book the room from the panel. We looked at
> different providers and those solutions either works with Exchange or
> Lotus Notes...
> 
> Since I already have code to fetch events from any CalDAV/WebDSV
> servers, I'm looking at building the system myself. So I'm wondering
> if any of you can recommend small LCD screen that works well with
> Linux (the app would be a full screen Web app, browser have to be
> Gecko or WebKit based), and even better if the screen can have «
> touch buttons » (so that people don't have to use a physical keyboard
> to book the room), that's even better. I guess my other option would
> be a iPad.
> 
> 
> -- Pascal Robert prob...@macti.ca
> 
> AIM/iChat : MacTICanada LinkedIn : http://www.linkedin.com/in/macti 
> Twitter : MacTICanada
> 
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[CentOS] [OT] Small touch screens that works with CentOS

[Pascal Robert]

Hi,

We want to display on a small LCD screen next to our meeting rooms and 
optionally let people book the room from the panel. We looked at different 
providers and those solutions either works with Exchange or Lotus Notes...

Since I already have code to fetch events from any CalDAV/WebDSV servers, I'm 
looking at building the system myself. So I'm wondering if any of you can 
recommend small LCD screen that works well with Linux (the app would be a full 
screen Web app, browser have to be Gecko or WebKit based), and even better if 
the screen can have « touch buttons » (so that people don't have to use a 
physical keyboard to book the room), that's even better. I guess my other 
option would be a iPad.


--
Pascal Robert
prob...@macti.ca

AIM/iChat : MacTICanada
LinkedIn : http://www.linkedin.com/in/macti
Twitter : MacTICanada

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[CentOS] linux/unix/osx administrator position available -- Milwaukee

[Andrea Laack]

My job will be coming available shortly.  I have been tasked with 
finding a replacement.  Please forward me your resume if you have the 
following skills:

Required:
* linux support
 Compiling from source.
 Tweaking makefiles.
 nfs file system.
 Custom scripting -- c shell
 kde
 Custom applications.
 iptables.
 samba.
 Preferably CentOS/RHEL experience.
 apache
 virtual machine support -- qemu, sun virtual box
 Some c/c++ code troubleshooting
*  OS X
 Tiger, Leopard and Snow Leopard
 nfs.
 Custom scripting
 command line
 dscl
 Darwinports
 Fink
*  Hardware
 Ability to custom build PCs for various purposes
* Windows XP
 Office Applications
 Virtual Machine support -- sun virtual box
* FreeBSD
 Compiling from source
 Tweaking makefiles
 nfs file system
 Custom scripting -- c shelle
 kde
* VPN support
* Various mail client support

At least 5 years experience with Linux, Unix, Windows, Mac OSX operating 
systems and applications.  Bachelor Degree or equivalent experience 
necessary.  You and others should consider you an expert on command line 
linux and OS X.

Desired Skills:
* Custom C/C++ programming

This job supports several research labs that utilize MRI and MEG for 
research.  Support of various MRI and MEG data analysis packages on 
various platforms.  Must have a good enough understanding of the 
operating systems and applications to learn custom applications without 
support or help.

You will be working with MDs, PhDs, Postdoctural Fellows and PhD/MD 
students who may have superior computer skills.

Salary is excellent and benefits are better.  This is an exempt position 
with a great PPO health care and dental plan.

Please forward me your resume and available start date.  This position 
is located at the Medical College of Wisconsin.

Thanks
Andrea Laack
ala...@mcw.edu
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