Re: [Haifux] Open Source Graphic Design - Discussion

2016-01-23 Thread Tzafrir Cohen
uot;invisible"
> cost: less training = less downtime, more value.

If there are enough users, there should also be commercial support.

But then again I wonder: just how good is that commercial support?

> 
> 5. DRM
> Adobe tools support DRM, this is something design shops/publishers often WANT.
> This is ... against freedom, and free tools, especially FSF based
> won't ever support this.

Can you give examples of where this is actually used?

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Re: [Haifux] The Heartbeat vulnerability in OpenSSL (and hence ssh/https)

2014-04-27 Thread Tzafrir Cohen
On Sun, Apr 27, 2014 at 12:17:45PM +0300, Nadav Har'El wrote:
 On Sun, Apr 27, 2014, Tzafrir Cohen wrote about Re: [Haifux] The Heartbeat 
 vulnerability in OpenSSL (and hence ssh/https):
  On Sat, Apr 26, 2014 at 02:20:17PM +0300, Sorana Fraier wrote:
   There is now a fork by openbsd people for openssl. It's called libressl.
   
   http://www.libressl.org/
   
   They crave for more people to help.
  
  Not really. If they wanted more people they wouldn't use the OpenBSD
  CVS.
 
 Not everyone has been drinking from the distributed version-control
 system coolaid. I agree that CVS should be dropped for Subversion which
 is more-or-less a superset of CVS, but let's not judge them harshly for
 not using Git.

I don't judge them for not using git. I judge them for using CVS.

In fact they clearly state on their page that they're not looking for
code contributions as the code is not ready yet.

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Re: [Haifux] The Heartbeat vulnerability in OpenSSL (and hence ssh/https)

2014-04-26 Thread Tzafrir Cohen
On Sat, Apr 26, 2014 at 02:20:17PM +0300, Sorana Fraier wrote:
 There is now a fork by openbsd people for openssl. It's called libressl.
 
 http://www.libressl.org/
 
 They crave for more people to help.

Not really. If they wanted more people they wouldn't use the OpenBSD
CVS.

This is the only example I can think of of a project switching from Git
to CVS. Though we had OpenOffice switching from Mercurial to Subversion
when moving to Apache.

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Re: [Haifux] The Heartbeat vulnerability in OpenSSL (and hence ssh/https)

2014-04-11 Thread Tzafrir Cohen
On Fri, Apr 11, 2014 at 08:35:00AM +0300, Eli Billauer wrote:
 Hi all,
 
 I suppose that the security freaks already know about this, and still, 
 this seems important enough for an alert.
 
 In a nutshell, a bug in the mechanism that allows keepalive messages to 
 be sent to maintain an SSL link, also allows, accidentally, a remote 
 attacker to read a segment of up to 64 kBytes from the server's memory. 
 It's doesn't give access to any chunk of 64 kBytes, but it's a segment 
 which is likely to be dirty with data that belongs to the process 
 running openSSL. So there's a chance that data related to private keys 
 and passwords is revealed this way.
 
 See http://en.wikipedia.org/wiki/Heartbleed
 
 I haven't found any tool checking a local SSH server, say as source code 
 in C. I suppose it's being avoided for the sake of not supplying the 
 almost-finished attack to script kiddies.

SSH is safe from this - it does not use this mechanism. Its protocol is
different.Likewise is GPG is safe from this bug as it is built with
GnuTLS.

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Re: [Haifux] mailing list to facebook

2013-07-10 Thread Tzafrir Cohen
On Wed, Jul 10, 2013 at 05:25:04PM +0300, yakoub abaya wrote:
 maybe write code to hook into the mail daemon ?

Doesn't really matter. Any list subscriber can do whatever it wants with
the list messages. For instance, some folks at http://mail-archives.com/
have decide to archive it, just for the kicks.

 what mail daemon are you using, can i view the application source handling
 the mailing list ?

Mail messages are, well, mail messages. Take a look at procmail /
formail as one starting point.

My procmail filter for this list:


:0
* ^List-Id: Haifa Linux Club mailing list haifux.haifux.org
.haifux/

(saves mail messages in the maildir haifux).


If I wanted to pipe it to a script:

:0c
* ^List-Id: Haifa Linux Club mailing list haifux.haifux.org
| path/to/my/script with params


As an example script: here's an email - XMPP (Jabber) convertor script:
http://www.ladro.com/jabber/jsmtp.html

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Re: [Haifux] [JOB OFFER] VB Developer needed in Univ. of Haifa

2013-07-09 Thread Tzafrir Cohen
On Mon, Jul 08, 2013 at 07:47:20PM +0300, Oron Peled wrote:
 On Monday 08 July 2013 15:42:43 Orr Dunkelman wrote:
  The department of political science at university of Haifa is looking for a
  VB developer (yes, not really FOSS-related, but it's in Haifa) for an
  interesting project.
 
 VB as in Virtually-Broken -- no?

I thought he meant VirtualBox, given the list.

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Re: [Haifux] Command-line tips meeting: A rough summary

2013-01-21 Thread Tzafrir Cohen
On Mon, Jan 21, 2013 at 10:09:19PM +0200, Eli Billauer wrote:

 netstat -a -n -p

Deprecated in recent years. Try 'ss' instead (similar switches. Slightly
different and better defaults).

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Re: [Haifux] Oops your system with plain malloc()

2012-05-17 Thread Tzafrir Cohen
On Thu, May 17, 2012 at 09:31:16PM +0300, Eli Billauer wrote:
 On 05/17/2012 08:56 PM, Shlomi Fish wrote:
 Oh wait! You're using kernel-2.6.35.4 - not kernel 3.5.x (which does not 
 exist
 yet). That's a really old version. Is it an up-to-date distribution kernel? 
 If
 so - you can report it to your distributor. If not - you should upgrade.

 Of course I should upgrade. That way I'll exchange a problem which has  
 zero impact on my system (currently) with  one that will possibly cause  
 real trouble. That's the good thing about upgrading all the time: You  
 have a lot of quality time with you computer, fixing whatever broke when  
 you upgraded to fix the previous problem.

 I may consider upgrading to a kernel  2.6.35 which has gone through a  
 long phase of bug fixes only but I understand there is no such around  
 at the moment. What I call a vintage kernel.

You obviously have a beefy system with memory to spare. You obviously
don't really care rebooting it. The logical conclusion: build some
kernels and test it. Grab a kernel tree, see if this still crashes
v2.6.35, and if so, git bisect is your friend.

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Re: [Haifux] Something fun and geeky to read

2012-05-09 Thread Tzafrir Cohen
On Wed, May 09, 2012 at 03:12:01PM +0300, boazg wrote:
 also, the black perl
 http://en.wikipedia.org/wiki/Black_Perl

http://www.ioccc.org/1990/westley.c - Charlie and Charlotte

Other entried from the IOCCC could be useful.

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[Haifux] Plover for fast typing [was: Re: [HAIFUX LECTURE] Maqaf Hataf Patakh - The new standard Hebrew keyboard layout by Amir E. Aharoni]

2012-01-13 Thread Tzafrir Cohen
The fast typing method that was mentioned at the meeting is Plover.
See:

http://ploversteno.org/
http://opensource.com/life/11/12/open-source-changes-face-stenography-and-possibilities-hearing-impaired

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[Haifux] coding guidelines

2012-01-09 Thread Tzafrir Cohen
Hi

The company I work for just ran into the thing called ISO9000. It seems
that one thing they want is to have coding guidelines for every
programming language used. Right now we have C, shell, perl, python and
PHP.

For C we mostly work on some existing projects. For the rest, I figure
that the kernel ones[1] are sane enough. The kernel folks also bothered
writing a small script to check for most of them (checkpatch.pl).

What would you recommend for coding guidelines for PHP and shell?

[1] http://kernel.org/doc/Documentation/CodingStyle

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Re: [Haifux] The Wiki Workshop tomorrow

2011-09-12 Thread Tzafrir Cohen
On Sun, Sep 11, 2011 at 07:17:03PM +0300, Eli Billauer wrote:
 Hello all,


 On behalf of Tomer, I'm forwarding his clarifications about tomorrow's  
 meeting. There's Hebrew in this mail, as these are entries in the Hebrew  
 Wikipedia.


 Forwarded message follows.


 


 The meeting will consist of a short presentation explaining the basic  
 wiki syntax and an explanation about how to write articles in Wikipedia.

 The participants will then write, rewrite or expand an article of their  
 choice. The following list is presented as an option:

ר' גם: 
http://he.wikipedia.org/wiki/%D7%A7%D7%98%D7%92%D7%95%D7%A8%D7%99%D7%94:%D7%AA%D7%95%D7%9B%D7%A0%D7%94_%D7%97%D7%95%D7%A4%D7%A9%D7%99%D7%AA
הקטגוריה תוכנה חופשית


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Re: [Haifux] [HAIFUX MEETING] Wiki-Workshop with Tomer Ashur

2011-09-11 Thread Tzafrir Cohen
Hi

On Sun, Sep 11, 2011 at 02:55:18AM +0300, Eli Billauer wrote:
 On Monday, September 12th (TOMORROW), at 18:30, Haifux will gather for a  
 Wiki-Workshop with Tomer Ashur.


 Abstract

 During this meeting, the Haifa Linux Club will help the Hebrew Wikipedia  
 project to extend, improve, generate, and fix various FOSS related 
 entries.

 The meeting will start with a few pointers by Tomer about how a good  
 Wikipedia entry looks like, and then will follow by participants working  
 on their assigned entries. We note that this is an opportunity for you  
 to contribute both to promoting FOSS and free content, even if you  
 cannot physically attend.

What do you mean?


 

 We meet in Taub (CS Faculty) building, room 6. For instructions see:  
 http://www.haifux.org/where.html

What about internet connectivity?

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Re: [Haifux] Running 32 bit applications (Firefox?) on 64 bit machines

2011-08-21 Thread Tzafrir Cohen
On Sat, Aug 20, 2011 at 09:36:59PM +0300, Muli Ben-Yehuda wrote:
 On Sat, Aug 20, 2011 at 07:32:29PM +0300, Eli Billauer wrote:
 
  It's not like I expect Firefox to address 1 GB of RAM.
 
 There's no 1GB of RAM limitation with 32 bit. Perhaps you meant 4GB of
 RAM?
 
  So it really makes me wonder: Why are the preinstalled binaries on a
  64 bit machine, well, 64 bit executables? I run a 64 bit machine
  because I want the *overall* RAM to exceed 4 GB, but except for
  virtual machines, I don't expect any application to have problems
  with the 32 bit limitation.
 
 I speculate that the best reason, from the distribution's point of
 view, is that it is simpler to only maintain and support one
 environment (64 bit) rather than maintain and support co-existing 32
 bit and 64 bit environments. Distributions will grudgingly carry both
 32 bit and 64 bit versions of an application where there 64 bit
 version is deficient in some sense (e.g., firefox with flash) but
 would naturally like to minimize these hassles.

From a distribution's point a view, on 64bit x86 it is actually safe to
assume that you have some useful optimization and a resonably recent
CPU.

That said, Debian and Ubuntu are now switching to MultiArch support as
well. It is said to be better designed than the current bi-arch support
in RPM-based releases. But it only just now got to the stage of being
useful enough to actually confuse users. So we'll just have to wait and
see.

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Re: [Haifux] Running 32 bit applications (Firefox?) on 64 bit machines

2011-08-21 Thread Tzafrir Cohen
On Sat, Aug 20, 2011 at 07:32:29PM +0300, Eli Billauer wrote:
 Hi,


 It has suddenly hit me, that there's no apparent reason to run most  
 executables as 64 bits on a x86_64 machine. I mean, what for? It's not  
 like I expect Firefox to address 1 GB of RAM. If it does, let it crash.  
 On the other hand, plugins and other binaries for 64 bits is a headache.  
 Flash player tops the list, I suppose.


 So it really makes me wonder: Why are the preinstalled binaries on a 64  
 bit machine, well, 64 bit executables? I run a 64 bit machine because I  
 want the *overall* RAM to exceed 4 GB, but except for virtual machines,  
 I don't expect any application to have problems with the 32 bit 
 limitation.

Another thing I forgot:

Try building Firefox (with debug information and such). IIRC you'll need
more than 4GB of memory space. And this is far from being the only
program.

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Re: [Haifux] No Poetry Today

2011-08-08 Thread Tzafrir Cohen
On Mon, Aug 08, 2011 at 10:43:16AM +0300, Orna Agmon Ben-Yehuda wrote:
 On Mon, Aug 8, 2011 at 7:54 AM, Tzafrir Cohen tzaf...@cohens.org.il wrote:
 
  On Sun, Aug 07, 2011 at 02:37:32PM +0300, Orna Agmon Ben-Yehuda wrote:
   Orr writes poetry,
   I am not in the mood.
   The talk queue is empty,
   and this is not good.
  
   So think of a topic,
   Suggest  an idea,
   Pick yourself a date
   Winter is near.
 
  I have no simple topic for a lecture. Though I wonder if it's possible
  to do an OpenStreetMap[1] mapping session instead. Note that it cannot be
  done at the standard place because:
 
  1. We need to add data. I suspect the Technion campus is already
  well-charted.
 
  2. We later need to upload data and edit it. This requires internet
  connectivity.
 
 
  Generally I would expect this to be done in small teams where each team
  must have:
 
  * BigBrother: with a GPS device monitoring the location. That trace
   should then be later to his/her OpenStreetMap account for easier
   mapping in a different computer.
 
  * Mapper: Someone who knows what we actually need to chart (and what we
   don't have to / shouldn't)
 
  A team should probably include 1-3 other participants.
 
 
  After finishing to cover an area, the team should move on to a place
  with an internet access and update the data.
 
 
  [1] http://www.openstreetmap.org/
 
 
 Great idea. I suggest the following organization:
 
 1. The mapper (volunteer required?) will find areas that need coverage, and
 prepare a list.

Looking at the map of Haifa[1] I can't pin-point a specific area that
needs improvements. Things that may be missing:

* English names
* Arabic names (are mostly missing)
* Footwalks
* Any other places worth mentioning: restaurants and such.

 2. People will sign up to areas and groups (a wiki page would be a good
 media for this), statingif they got a GPS device.
 3. In a Haifux meeting, Tzafrir (who kind of volunteered) or and/or others
 will
 A. help people configure their GPSes and install them with whatever needed.
 This will enable people who are not good technically to join the effort,
 including school kids on vacation etc (great activity for the summer).
 B. explain how to upload the data exactly.
 4. People will take the tours and upload the data on their own time.
 5.If they had any trouble, we will devote the beginning of the next Haifux
 meeting to helping them do it.
 
 Tzafrir, can you be the mapper, or do you depend on someone else?


[1] http://osm.org/go/xtTpfiR1-- and that area

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Re: [Haifux] No Poetry Today

2011-08-08 Thread Tzafrir Cohen
On Mon, Aug 08, 2011 at 02:33:08PM +, Tzafrir Cohen wrote:
 On Mon, Aug 08, 2011 at 10:43:16AM +0300, Orna Agmon Ben-Yehuda wrote:
  On Mon, Aug 8, 2011 at 7:54 AM, Tzafrir Cohen tzaf...@cohens.org.il wrote:
  
   On Sun, Aug 07, 2011 at 02:37:32PM +0300, Orna Agmon Ben-Yehuda wrote:
Orr writes poetry,
I am not in the mood.
The talk queue is empty,
and this is not good.
   
So think of a topic,
Suggest  an idea,
Pick yourself a date
Winter is near.
  
   I have no simple topic for a lecture. Though I wonder if it's possible
   to do an OpenStreetMap[1] mapping session instead. Note that it cannot be
   done at the standard place because:
  
   1. We need to add data. I suspect the Technion campus is already
   well-charted.
  
   2. We later need to upload data and edit it. This requires internet
   connectivity.
  
  
   Generally I would expect this to be done in small teams where each team
   must have:
  
   * BigBrother: with a GPS device monitoring the location. That trace
should then be later to his/her OpenStreetMap account for easier
mapping in a different computer.
  
   * Mapper: Someone who knows what we actually need to chart (and what we
don't have to / shouldn't)
  
   A team should probably include 1-3 other participants.
  
  
   After finishing to cover an area, the team should move on to a place
   with an internet access and update the data.
  
  
   [1] http://www.openstreetmap.org/
  
  
  Great idea. I suggest the following organization:
  
  1. The mapper (volunteer required?) will find areas that need coverage, and
  prepare a list.
 
 Looking at the map of Haifa[1] I can't pin-point a specific area that
 needs improvements. Things that may be missing:
 
 * English names
 * Arabic names (are mostly missing)
 * Footwalks
 * Any other places worth mentioning: restaurants and such.

 [1] http://osm.org/go/xtTpfiR1-- and that area

Looking at it again, I bet the area of Nesher could use a loving hand.
Compare the Technion to Nesher in http://osm.org/go/xtTp0gf7 .

So maybe we'll start with something along the lines of:

http://osm.org/go/xtTp0idT2--
http://osm.org/go/xtTp0q4OV--
http://osm.org/go/xtTp0z4xZ--

That is: basically the area of Nesher near the Technion.

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Re: [Haifux] No Poetry Today

2011-08-07 Thread Tzafrir Cohen
On Sun, Aug 07, 2011 at 02:37:32PM +0300, Orna Agmon Ben-Yehuda wrote:
 Orr writes poetry,
 I am not in the mood.
 The talk queue is empty,
 and this is not good.
 
 So think of a topic,
 Suggest  an idea,
 Pick yourself a date
 Winter is near.

I have no simple topic for a lecture. Though I wonder if it's possible
to do an OpenStreetMap[1] mapping session instead. Note that it cannot be
done at the standard place because:

1. We need to add data. I suspect the Technion campus is already
well-charted.

2. We later need to upload data and edit it. This requires internet
connectivity.


Generally I would expect this to be done in small teams where each team
must have:

* BigBrother: with a GPS device monitoring the location. That trace
  should then be later to his/her OpenStreetMap account for easier
  mapping in a different computer.

* Mapper: Someone who knows what we actually need to chart (and what we
  don't have to / shouldn't)

A team should probably include 1-3 other participants.


After finishing to cover an area, the team should move on to a place
with an internet access and update the data.


[1] http://www.openstreetmap.org/

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Re: [Haifux] When was the last time you have given a talk @ Haifux?

2011-05-05 Thread Tzafrir Cohen
On Thu, May 05, 2011 at 01:42:39PM +0300, Orna Agmon Ben-Yehuda wrote:
 Most problematic.
 We cannot access chats in that floor.

Looks like an interesting chalange.

Is it possible to hook up any Linux laptop to the network there? Never
mind the main display for now.

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[Haifux] עבודה: מפתח לינוקס במשרה מלאה

2011-03-22 Thread Tzafrir Cohen
לחברת קסורקום, העוסקת בתחומי טלפוניה ולינוקס, דרוש מפתח במשרה מלאה.

דרישות:

* הכרות טובה עם בניית ותחזוקת מערכת לינוקס (בעיקר Centos)
* הכרות עם אסטריסק או טלפוניה בכלל: יתרון
* נסיון בתחזוקת קוד PHP, פרל, shell, פייתון: יתרון

מקום העבודה: אזור התעשיה משגב (דרומית לכרמיאל)

לבירורים וקורות חיים, נא לפנות אלי.

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Re: [Haifux] some additions and eratta to today's lecture

2011-03-15 Thread Tzafrir Cohen
On Tue, Mar 15, 2011 at 11:00:02AM +0200, Shachar Raindel wrote:
 Hijacking the thread to a more general HD discussion.

And while we're at it, here's the article I mentioned about the funny
behaviour of write to SSDs:
http://lwn.net/Articles/428584/

Short summary: someone of the Linaro project (Linux on ARM) looks into
the matter only to discover those devices are heavily tuned for using
FAT32 as the file system.

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Re: [Haifux] Public Domain Day event - January 5th, HaifaU

2011-01-04 Thread Tzafrir Cohen
On Mon, Jan 03, 2011 at 04:03:33PM +0200, Orna Agmon Ben-Yehuda wrote:

 A laptop with Linux, so people can see Linux on a desktop
 A laptop with Linux installed with kids games

* gcompris should have decent Hebrew support IIRC.
* sugar is interesting and innovative. I finally managed to get it
  working on my laptop as a separate login. Not all it working, but
  there are some interesting things.
* Show yesterday's eclipse in Stellarium

(I may or may not be able to attend)

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Re: [Haifux] [HAIFUX LECTURE] Creative Commons Licenses - Dalit Ken-Dror - Part II

2010-12-21 Thread Tzafrir Cohen
On Thu, Dec 16, 2010 at 10:57:14PM +0200, Orna Agmon Ben-Yehuda wrote:
 On Monday, December 20th, at 18:30, Haifux will gather to hear Dalit
 Ken-Dror continue her talk about
 
  Creative Commons Licenses, Open Source Software Licenses  the new
 Israeli Copyright Act of 2007
 
 Abstract
 
 Part I of the talk covered the new Israeli Copyright Act of 2007. This part
 of the talk will focus on Creative Commons Licenses.

כמו שנכתב בתגובה להודעה הזו, השקפים:

http://haifux.org/lectures/247/haifux-cc-lecture.pdf

ההרצאה היתה מעניינת ומחכימה. זה נושא שחשוב לדעת עליו יותר.


כמה הערות בקשר לנושא ההרצאה:

1. תוכנה חופשית

ההרצאה לא הספיקה להגיע לנושא הזה ברמת פירוט גבוהה. תוכנה חופשית מבית
מדרשו של סטולמן וקוד פתוח מבית מדרשו של ריימונד אולי שואפים לדברים
שונים, אך בפועל המושגים הללו קרובים מאוד. סטולמן דיבר על ארבע החרויות
שתוכנה חופשית צריכה להבטיח[1]. יותר מאוחר נכתבה הגדרת הקוד הפתוח של מוסד
הקוד הפתוח[2]. בפועל רשימת הרשיונות שקרן התוכנה החופשית מחשיבה כתוכנה
חופשית[3] מסכימות כמעט על כל הרשיונות.

הפצות שונות (הדוגמאות הבולטות הן דביאן ופדורה) יפסלו לעיתים גם תוכנות
חופשיות משיקולי רישוי. לדוגמה: יש להן בעיות של הפרת פטנטים, או שהן
דורשות תוכנות לא חופשיות לצורך בנייתן. לפעמים יש גם חוסר הסכמה בין הפצה
מסויימת לבין אחת מהרשימות הנל[5].

אז בקיצור, לא ממש משנה אם קוראים לזה תוכנה חופשית או קוד פתוח. במקרים
רבים משתמשים באנגלית בראשי התיבות FOSS - Free and Open-Source Software
או FLOSS - Free/Libree and Open Source Software.

מבין רשיונות Creative Commons, כל רשיון עם דרישה של מניעת שימוש מסחרי או
מניעת יצירה נגזרת משמעותה שהרשיון כבר לא מתאים לכללי התוכנה החופשית.


2. מידע על רשיונות בויקיפדיה

בעקבות שאלה של מישהו: המצב  בויקיפדיה העברית אכן גרוע (עזרה תתקבל בברכה).
לעומת זאת, בזו האנגלית יש פרוט לא רע.


3. רשיונות פשוטים

אני רוצה לחזור על ההדגשה: לא לכתוב רשיון שימוש. זה מסמך משפטי מחייב.
עדיף להשתמש במסמך קיים.

לדוגמה: 
http://en.wikipedia.org/wiki/WTFPL
שימו לב שזו גרסה 2 של הרשיון.

[1] http://www.gnu.org/philosophy/free-sw.html
[2] http://opensource.org/docs/osd
[3] http://www.gnu.org/licenses/license-list.html
[4] http://opensource.org/licenses/
[5] http://wiki.debian.org/DFSGLicenses#GNUFreeDocumentationLicense.28FDL.29

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Re: [Haifux] Router question

2010-10-18 Thread Tzafrir Cohen
On Mon, Oct 18, 2010 at 02:23:46PM +0200, Ohad Lutzky wrote:
 What do you guys think about this issue? I want to say that it's pressing,
 but:
 
 1. This is the only remaining problematic protocol for me. SSH works
 perfectly, and git works just as well over HTTP nowadays, if I'm not
 mistaken.
 2. It seems unnecessary, in my opinion, for this protocol to exist - it
 should just be done over HTTP.

Surely not. A different protocol makes it easy for the provider to treat
this protocol differently.

 
 However, network neutrality is always important, and Bezeq International's
 claims of we don't block any ports become problematic (albeit technically
 true). Is there anything that can be done about this?

At work (at the time: using a Barak business ADSL account) had to mess
with the support personnel for a few days to make the git protocol work
properly. Don't expect them to actually admit it. Expect those network
oddities to resolve themselves. 

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Re: [Haifux] [HAIFUX LECTURE] Packaging in Debian - Ohad Lutzky

2010-08-29 Thread Tzafrir Cohen
On Sun, Aug 29, 2010 at 01:56:19PM +0200, Eli Billauer wrote:
  TOMORROW, August 30th at 18:30, Haifux will gather to hear Ohad Lutzky  
 talk about:

 Packaging in Debian

 Debian is one of the more popular Linux distributions, well-known for  
 its excellent package management. Debian has also been known to be the  
 base for many other distributions, such as knoppix and ubuntu. In this  
 lecturre I will show how to build packages, how to build repositories,  
 how to version-control the whole thing by example of git, as well as a  
 short overview of the extensive documentation available on the subject.

I see nobody was interested in my off-topic suggestion, so, here it is
again:

I normally don't get to come to lectures. I suppose I'll come to this
one. I realised that in all the Haifus meetings I don't recall anybody
asking me to sign a OpenPGP key. Nor have I asked anyone to sign my
key(s).

I thus figured it might be a good idea to set-up key signing. After all,
we are relatively well-connected. So, if you have an existing key, and
you want it to be signed by others in the lecture tommorow:

1. (Prefferebly) send me the (public) key (gpg --export KEY_ID).
2. Bring a printed copy of the key's ID (gpg --fingerprint KEY_ID)
   2.1. Maybe bring multiple copies of it in case (1) fails.
See e.g. gpg-key2ps in the package siging-party (Debian/Ubuntu)
3. Brind a valid ID card (or driver's license or whatever, Should
   identify you, and include a photo).

If you have no idea what I'm  talking about:
* Look it up. 
* http://cryptnet.net/fdp/crypto/keysigning_party/en/keysigning_party.html
* If there's enough interest, well:

 *OPEN SLOT ALERT*


 The next slot on September 13th is still vacant! This could be YOUR  
 talk. Don't miss the opportunity!

(I'm not sure I can make such a lecture. Anybody?)

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Re: [Haifux] Lecture proposal: Packaging in Debian

2010-08-16 Thread Tzafrir Cohen
On Mon, Aug 16, 2010 at 10:35:01PM +0300, Ohad Lutzky wrote:
 Debian is one of the more popular Linux distributions, well-known for its
 excellent package management. Debian has also been known to be the base for
 many other distributions, such as knoppix and ubuntu. I can show how to
 build packages, how to build repositories, how to version-control the whole
 thing by example of git, as well as a short overview of the extensive
 documentation available on the subject.

Slightly related: 

anybody need their PGP keys signed?

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Re: [Haifux] Haifux is a candidate for Hamakor Prize

2010-08-06 Thread Tzafrir Cohen
On Wed, Aug 04, 2010 at 11:46:22AM +0300, Shlomi Fish wrote:
 On Wednesday 04 August 2010 10:12:48 Orna Agmon Ben-Yehuda wrote:
  Clarification: we need someone who is going to August Penguin the day after
  tomorrow, to go up on stage and get the document of candidacy or winning.
  Neither Orr, nor Eli, nor I, will be able to attend. We got no response so
  far, from no one.
  
  So please don't make the calculation of others are more 'Haifuxers' than
  me (what does that mean, anyhow?). It brings us to zero volunteers. We
  need one person to go on stage and get the document, that is all.
 
 I guess I can take the prize if I'm going to attend (which I'm planning to.)

Sadly Shlomi was not able to represent Haifux, as he was too busy
representing the Mantises of Perl-IL at the same time :-)

Kudos  to the Blogli folks who ended up first in that category.

You missed a nice event. I hope to see you there next year.

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Re: [Haifux] Haifos?

2010-04-08 Thread Tzafrir Cohen
On Wed, Apr 07, 2010 at 04:25:17PM +0300, Shlomi Fish wrote:
 On Wednesday 07 Apr 2010 15:54:22 Dotan Cohen wrote:
  Considering that many lectures and mailing list topics are not
  Linux-specific, might it be wise to take Shlomi Fish's example and
  rename to Haifos - Haifa Open Source? I personally like promoting
  Linux in the group name, but it is a bit inaccurate.
 
 Well, before renaming Haifux to Haifos or HaiFOSS or HaiFree (because you may 
 discuss open/free content too) 

No. FOSS, as we all know, fails to state that we're talking about
Free (*Libre*) OSS, and may confuse people to thing we're talking about
freebies. Thus the name should be HaiFLOSS. And the homepage should be
green.

Gah, this thread should have been a week ago. Like
http://thread.gmane.org/gmane.linux.kernel/969355 .

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Re: [Haifux] Kernel oops, so what?

2010-01-16 Thread Tzafrir Cohen
On Fri, Jan 15, 2010 at 10:49:41PM +0200, Orna Agmon Ben-Yehuda wrote:
 On Fri, Jan 15, 2010 at 4:27 PM, Eli Billauer e...@billauer.co.il wrote:
  Hello,
 
 
  Maybe this is a boker-tov-eliyahu thing, but still. I've installed
  Fedora 12, just to find out that it warns me about kernel oopses. In my
  remote memories, I recall that a kernel oops usually meant that my
  hardware was cooking (in those days when Linux was rock solid and
  hardware wasn't) and the computer froze completely.
 
 
  Now I get an oops warning every now and then, but nothing really
  happens. And I wonder what is going on? Has the dreaded oops become
  something one can live with? And then there's this site which collects
 
 Hypothesis: nowadays, machines have at least two cores. Even if
 something got seriously messed up on one core, there is still the
 other core still able to do something and recover somehow. 

Those two cores still share the same memory space. If a certain kernel
thread wrote to some unexpected in the kernel memory space, you'll have
problems later on. If a kernel thread existed unexpectedly and left some
resources in use, you may have a problem recovering.

  Jan 15 14:45:17 test kernel: WARNING: at arch/x86/kernel/hpet.c:390
  hpet_next_event+0x5c/0x81() (Not tainted)

But as Muli already noted, this is a warning, rather than a 'BUG'. The
kernel code in question did continue execution.

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Re: [Haifux] Kernel oops, so what?

2010-01-16 Thread Tzafrir Cohen
On Sun, Jan 17, 2010 at 12:06:27AM +0200, Eli Billauer wrote:
 Hi,
 
 Just to wrap the story up: I checked the source code. The offending 
 oops comes from a line 390 in hpet.c, which is the WARN_ON_ONCE call 
 below:
 
 kernel code
 /*
  * We need to read back the CMP register to make sure that
  * what we wrote hit the chip before we compare it to the
  * counter.
  */
 WARN_ON_ONCE((u32)hpet_readl(HPET_Tn_CMP(timer)) != cnt);
 /kernel code
 
 (there are two hpet.c in the kernel tree, but I won't be fussy)

Two arch/x86/kernel/hpet.c? (the path from the message)

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Re: [Haifux] cat-like command

2009-12-20 Thread Tzafrir Cohen
On Sun, Dec 20, 2009 at 11:43:51AM +0200, Shlomi Fish wrote:

 And finally, you may opt to buy this cheap Mipsel machine:
 
 http://en.wikipedia.org/wiki/Lemote

MIPS can be either big endian or little endian. mipsel is little
endian MIPS.

arch/mips/configs/lemote2f_defconfig has:

# CONFIG_CPU_BIG_ENDIAN is not set
CONFIG_CPU_LITTLE_ENDIAN=y

(I just got one such laptop. Looks nice, though the included software
could be improved. They seem to be making an effort and I see quite a
few changesets from @lemote.com addresses in 2.6.33)


OTOH, you can buy a used Mac/PowerPC


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Re: [Haifux] FOSS/Proprietary Debate

2009-11-14 Thread Tzafrir Cohen
On Sat, Nov 14, 2009 at 06:01:27PM +0200, Orna Agmon Ben-Yehuda wrote:
 Hello all, and especially the avid argumentative people,
 
 The Technion debate club has offered to organize a show-debate on the
 subject of FOSS vs. proprietary software. 

Could you please be more specific? There are a number of quite different
questions:

* Is FOSS useful for the economy?
* Is proprietary software good for the economy?
* Is proprietary software immoral?

etc.


Here is an example of a more focused question:

  Should FOSS be preffered to proprietary software in goverenment
  contracts?

Note that this question mostly ignores moral aspects.

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Re: [Haifux] How come Haifux isn't listed in linux.org's LUG listing?

2009-11-10 Thread Tzafrir Cohen
On Tue, Nov 10, 2009 at 12:50:02PM +0200, Tzafrir Rehan wrote:
 http://www.linux.org/groups/israel.html
 
 No Haifux :(

http://www.linux.org/groups/ mentions you should contact the webmaster
to add your group. I just did.

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Re: [Haifux] [HELP HELP] Uses of Linux in the real world

2009-10-31 Thread Tzafrir Cohen
On Sat, Oct 31, 2009 at 12:51:37AM +0200, guy keren wrote:

 linksys wireless routers are linux-based machines.

Some of them. Some aren't.

E.g. WRT54G (later versions) vs. WRT54GL

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Re: [Haifux] [W2L] Call for lecturer + Linux guru

2009-10-17 Thread Tzafrir Cohen
A note regarding your terminology:

On Sat, Oct 17, 2009 at 03:50:40AM +0200, Ohad Lutzky wrote:

 I still believe that with warning on those two issues, git is simple enough
 to use, and that the ability to work offline is well worth it.

Work offline is a problem only if the alternative is SVN or another
centralized system. If you just use files, you have no problems working
offline.

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[Haifux] OT: yes, I do want duplicates

2009-10-16 Thread Tzafrir Cohen
Slightly off-topic, but:

I noticed that messages from the recent discussion were only coming into
my INBOX and not into my haifux folder.

Fix: logging into the mailman web interface and setting Avoid duplicate
copies of messages? to No.

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Re: [Haifux] [W2L] Call for lecturer + Linux guru

2009-10-16 Thread Tzafrir Cohen
On Fri, Oct 16, 2009 at 10:05:14AM +0200, Vadim Eisenberg wrote:
 guy keren wrote:
  you can mention memory leaks if you want - but students don't care about 
  them so much, because it doesn't break their programs.
 
 Starting from the Winter 2008-2009 semester, the memory leaks are 
 checked in Matam (Introduction to Systems Programming) course and 1 
 point is reduced for each leak. The check is done automatically, 
 using, guess what, valgrind. So the students in Matam actually care
 very much about the memory leaks.

... which are detectable by valgrind :-)

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Re: [Haifux] [W2L] Call for lecturer + Linux guru

2009-10-16 Thread Tzafrir Cohen
On Fri, Oct 16, 2009 at 01:35:09PM +0200, boazg wrote:
 it seems that on t2 (now called stud) you can use not only file:/// but also
 svn+ssh://, with only a student account. in that case i agree that
 subversion is much better than git for this purpose.

git works just as well with git-over-ssh repositories. Alternatively you
can also use the http method to provide a public repository off t2 from
your homepage :-)

(Just make sure to 'chown +x .git/hooks/post-update' At least here -
Debian Lenny - this makes a repository run the required
git-update-server-info)

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Re: [Haifux] [W2L] Call for lecturer + Linux guru

2009-10-15 Thread Tzafrir Cohen
On Thu, Oct 15, 2009 at 05:14:50PM +0200, boazg wrote:
 as a side note, a seperate lecture on git for CS students, and how to use it
 with t2 would be a good idea.

Why git?

While I think git is a handy tool, did you have in mind developement
tools?

Other tools that come in mind:

gcc
make
vi / vim
gdb
autotools
emacs
kdevelop
eclipse

(Just a list of tools from the top of my head, I don't intend to start a
flame war on the exact content of a non-existing lecture)

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Re: [Haifux] [W2L] Call for lecturer + Linux guru

2009-10-15 Thread Tzafrir Cohen
On Thu, Oct 15, 2009 at 08:17:22PM +0200, Orna Agmon Ben-Yehuda wrote:
 Great idea. Can you do this? We have not had anything on source
 control since Tzahi Fadida's CVS.

You're right. We had a lecture about Git, but it's not a Version Control
System :-)

http://www.haifux.org/lectures/182/

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Re: [Haifux] [W2L] Call for lecturer + Linux guru

2009-10-15 Thread Tzafrir Cohen
On Thu, Oct 15, 2009 at 09:13:58PM +0200, Eli Billauer wrote:
 OK, I think this is a good time to express my view regarding the  
 Development tools lecture. It's purpose, as I see it, is to give the  
 students a nice start with the right tools for developing code, as  
 needed for their exercises. If their experience is good, they'll stay.  
 If not, they'll soon use the alternatives.


 If you want to give a lecture about any other subject, as a  
 Stay-in-Linux or mainstream lecture, by all means come forward. But  
 let's try to get some focus on the initial lecture.


 Correct me if I'm wrong, but a student is not likely to go beyond a  
 project which runs on a single platform, having a few source files, and  
 with no more than two or three persons involved. Hence autotools are  
 irrelevant, and so are version control systems. Tarballing all sources,  
 and sending to your partner with comments, is as much version control as  
 you need in these situations.

I'm not sure I agree with you regarding version control systems.

Specifically distributed version control systems make the common case of
a repository for the project simple. Unlike Subversion, you don't need
to set up a separate server.

And it saves you a whole lot of time in saving ex1.c_1 , ex1.c_2,
ex.c.orig and such. I think that demonstarting simple linear workflow
(no branches, no remote repositories) with git, bzr or hg could be handy.

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Re: [Haifux] Idea: Welcome to Open Source instead of Welcome to Linux this year

2009-09-11 Thread Tzafrir Cohen
On Fri, Sep 11, 2009 at 01:26:32PM +0300, Ohad Lutzky wrote:
 I agree. Welcome to Linux and FOSS should be the name, and a short (no
 more than 20 words) explanation of the name should preclude the event.

Now try pronouncing that :-)

It's not that short.

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Re: [Haifux] Missing UDP statistics in recent distributions (RcvbufErrors, SndbufErrors)

2009-07-28 Thread Tzafrir Cohen
On Tue, Jul 28, 2009 at 10:45:23PM +0200, Eli Billauer wrote:
 Hi,
 
 
 We won't discuss the pieces of software running on my own computers. 
 Only say that from where I stand, there is an afterlife. ;)

But for the benefit of the archeologists among us:

  http://archive.kernel.org/

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Re: [Haifux] Open call for projects by ISOC-IL

2009-07-23 Thread Tzafrir Cohen
On Thu, Jul 23, 2009 at 02:51:39PM +0200, Eli Billauer wrote:
 Hello,
 
 In this context, I have two words in mind: GIMP and Hebrew.
 
 Maybe the situation has become better since I downloaded my version 2.4, 
 but proper documentation and translation of the GUI may be in place.
 
 Just an idea, if someone wants to pick it up.

Another thing, in the context of Hebrew, I'd really love to see (though
I have no idea about the complexity) is text-to-speech.

Koby Zamir put some initial working version based on Mbrola:

http://linmagazine.co.il/hacking/2009/07/15/kzamir/mborla-voice-synth

However Mbrola is in the not exactly free category.

Don't you just love to have an ugly, metalic voice read your email with
tons of funny errors?

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[Haifux] an OS for your PIC

2009-06-30 Thread Tzafrir Cohen
Just two projects I rant into recently on Freshmeat and might seem a bit
more useful now after the lecture on the Arduino:

First:

  http://www.sics.se/contiki/

Contiki is an open source, highly portable, multi-tasking operating
system for memory-efficient networked embedded systems and wireless
sensor networks. Contiki has been used is a variety of projects, such as
road tunnel fire monitoring, intrusion detection, water monitoring in
the Baltic Sea, and in surveillance networks.

Contiki is designed for microcontrollers with small amounts of memory. A
typical Contiki configuration is 2 kilobytes of RAM and 40 kilobytes of
ROM.


(And it can even use IPv6)


The second one appears to be a bit more posixish:

  http://nuttx.sourceforge.net/

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Re: [Haifux] Fun with timezones in Linux

2009-04-18 Thread Tzafrir Cohen
On Sat, Apr 18, 2009 at 07:17:27PM +0300, Ohad Lutzky wrote:
 Hello folks,
 
 I've recently been dealing with an odd timezone issue at work, which has to
 do with daylight savings time. I've published a blog post about it, and I'd
 very much appreciate any input you might have.
 http://blog.lutzky.net/2009/04/18/timezones-are-fickle/
 Many thanks!

Pure timezones with no DST mess?

TZ=GMT-3 date
TZ=GMT-2 date

Sure, there are many ways you can shoot yourself in the foot.

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Re: [Haifux] Windows-Free laptops in Haifa

2009-02-08 Thread Tzafrir Cohen
On Sun, Feb 08, 2009 at 09:52:47AM +0200, Dan Shimshoni wrote:
 Hi everybody,
 
 Reminder:
 On 3.12.08, we heard about Zvi Devir and his Successful Windows Vista
 refund - see:
 http://www.mail-archive.com/haifux@haifux.org/msg03372.html
 
 And later, there was a lecture in Haifux by Zvi Devir about it:
 see:  http://www.mail-archive.com/haifux@haifux.org/msg03451.html
 
 And now what ?
 
 I went last week to two stores in Haifa area, of very large and
 country-wide computer network stores;
 I do not want to mention names here.
 
 I asked about some models of laptops (Lenovo and others) ; they told
 me that they are not
 selling these models of laptops without Windows Vista, and that it is
 everywhere thus.
 When I told  them about Zvi Devir and his case, they laughed. It did not
 interest them, and they said that they are not going to change anything
 in this policy.

Cheaper Dell models in Israel seem to be distributed with FreeDOS as an
OS.

Some Acer laptops are distributed with some Linux distribution (Linpus.
Yeah, a distro iwth such a name really exists).

Not sure about others. Best of luck if you go for a more expensive
model.

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Re: [Haifux] Windows-Free laptops in Haifa

2009-02-08 Thread Tzafrir Cohen
On Sun, Feb 08, 2009 at 11:33:16AM +0200, Eli Billauer wrote:
 Dan Shimshoni wrote:
 
  The struggle must go on!
 

 Sincerely, I don't know what for. The situation is not going to change 
 because a very small group of people starts to bother computer stores 
 with an unusual request. Asking to check the laptop for Linux 
 compatibility with a Live CD makes sense, but with all respect, I find 
 this struggle pointless. Unless you enjoy it, of course.

You mean: asking them to do what Dell already does today in Israel
(preload with FreeDOS) is too much?

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Re: [Haifux] The 10th tip?

2009-02-07 Thread Tzafrir Cohen
On Sat, Feb 07, 2009 at 10:12:00PM +0200, Oron Peled wrote:

  * The Unix part is tragic story in itself. Let's start with the simple
fact it uses csh/tcsh (Nee, nee, nee, nee)

Nope :-(

http://webcourse.cs.technion.ac.il/234122/Winter2008-2009/en/syllabus.html

Even Mac OSX defaults to a posix shell (bash).

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Re: [Haifux] Student complaints.

2009-02-02 Thread Tzafrir Cohen
On Mon, Feb 02, 2009 at 03:31:35PM +0200, Dotan Cohen wrote:

 No Linux video player can play the Technion's video lecture files. 

Err... what format do they use there?

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Re: [Haifux] Haifux Digest, Vol 17, Issue 15

2009-01-27 Thread Tzafrir Cohen
On Tue, Jan 27, 2009 at 12:13:19PM +0200, Shlomi Fish wrote:
 On Tuesday 27 January 2009 08:59:51 Eran Arbel wrote:
  Hi, some time reader, first time writer.
  I'm a second year CS student and had to work with the Linux in the farms
  for a while now and frankly, I love the idea that someone finally forced me
  to use Linux. I think it's a good thing.
 
  I've already had stuff explained to me and had a chance to explain things
  to others. I already told people that they better get used to using the
  Linux and Unix on the farm machines. Firstly, because they have to;
  Secondly, because it's better; And thirdly, because it's fun.
 
  Problems of Windows\Linux compatibility with code files I solved with
  Notepad++. I don't know if there's a Linux version or a Linux substitute
  but it's an awesome writer for windows that can display context in many
  languages and can also convert to\from Windows from\to Linux formatting.
  Saved me a lot of trouble
 
 First of all, you can always use tofrodos to do the conversion if needed:
 
 http://www.thefreecountry.com/tofrodos/index.shtml
 

 And otherwise, vim and other text editors for Linux are capable of converting 
 from CRLF to LF and vice-versa, but I cannot tell you off-hand how to do 
 that. 
vim will show you if the file is dos in the info line.

For more information: vim +'h dos-file-formats'

(To which I got by :h dostabtabtab... )

Most files can be either dos or unix, but some (notably shell scripts)
must be unix.


BTW: another crazy way to convert source files between dos and unix
formats is to store them in an SVN repository and check them out
separately in each environment.

You can create a simple SVN repository under your home directory and
access it through file: or svn+ssh: .

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Re: [Haifux] The use of SSDL...

2009-01-27 Thread Tzafrir Cohen
On Tue, Jan 27, 2009 at 05:42:31PM +0200, Yossi Gil wrote:
 Some of the comments I got showed that I did not make as clear as I should
 have the kind of teaching we do in SSDL.
 
 We offer the following courses:
 
 Software Design: Java based.
 Software Engineering: Mostly Java.
 Object Oriented Programming: C++, Java and C#.
 Programming Languages: ML and Prolog.

Which implementations are used?

BTW: there are a number of ocaml packages in actual use.

$ aptitude search '~Gimplemented-in::ocaml' | wc
1781517   14418

(on Debian Lenny - unison and hevea are among those packages)


 Software Verification:

Again: what relevant tools?

 Software Seminars.

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Re: [Haifux] LINUX and SSDL

2009-01-26 Thread Tzafrir Cohen
On Mon, Jan 26, 2009 at 08:59:45PM +0200, Haggai Eran wrote:

 On Mon, Jan 26, 2009 at 8:22 PM, Yossi Gil yossi@gmail.com wrote:
 
  2. Running FF3 is not possible if a user is logged on to multiple stations.
 
 This isn't a solution for the common user, but an advanced user can run
 firefox with a command line argument '-no-remote' which would cause it to
 open a new session, instead of connecting to the previous one.

But the profile will remain locked.

BTW: Konqueror does not have this problem. It baiscally allows a
separate instance per display rather than simply locking by the file
system.

 
 
  I also have my personal technical question, which you may be able to help
  in. I use Linux on a wireless home network, and I would like to do a couple
  of wireless network mounts, prior to any login screens. Any ideas on how I
  convince the computer to connect to the wireless before I logon?

Prior to login or at login? 

At login: pam-mount (heard the name, never used it)

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Re: [Haifux] Successful Windows Vista refund!!

2008-12-04 Thread Tzafrir Cohen
On Wed, Dec 03, 2008 at 10:26:32AM +0200, Eyal Rozenberg wrote:
 Bravo Zvi!

 What was the reason not to go to court, though? I mean, I don't suppose  
 you needed the 550 so badly... :-)

Sure he does: http://www.hamakor.org.il/content/view/41/51/

;-)

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Re: [Haifux] Multi-thread debugging for C++ on Linux

2008-11-28 Thread Tzafrir Cohen
A minor technical note:

On Fri, Nov 28, 2008 at 06:17:38PM +0200, gabik wrote:

 So as long as the threads are kernel threads and have different pids (which
 is what happens in latest fixed versions of POSIX Linux threads)

Threads had different PIDs even before that. They were actually even 
less connected before the NPTL change in Linux 2.6 .

But then again, most of us don't need to care about Linux 2.4 and older...

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Re: [Haifux] Why open source

2008-11-28 Thread Tzafrir Cohen
On Fri, Nov 28, 2008 at 06:07:09PM +0200, Tal Abir wrote:
 Hi,
 Lets say you wrote a utility that may be useful to others.

Is it useful for you as well?

 Why would you open source it?

There are several reasons. 

Do you think you can actually make money from selling the software as 
a stand-alone product? Without support? If you make it free software you
can still sell support. You're more likely to get good bug reports and
even some patches.

Furthermore, if you actually need that software to work well for you
(e.g. to offer a better service to your clients) then making it free
software reduces the development cost. It also reduces the deployment
cost, because there's no licensing overhead and there's no inherent
conflict between the developer and the user.

For instance, it means people can get support from someone else, and
hence they won't be left with a useless pile of bits if you're gone. It
gives the software a higher value.

 How can you earn money from opening the code and giving it for free?

There are several possible methods. 

Here is an article discussing several of them:
http://www.letmegooglethatforyou.com/?q=how+can+I+make+money+from+opensource

That said, it is still a tricky business. But then again, getting people
to pay you for limited usage licenses for a software isn't that easy as
well (specifically if there is an interesting competition).

Note that I did not write here that you should release your software as
free software. You wrote it, and it is up to you to license it.

 Source forge is making money from hosting your utility, 

SourceForge makes osme money form adds. But also from selling the 
proprietary SourceForge development platform.

 Wikipedia is making money from documenting it, 

Wikimedia is hosted by the Wikimedia foundation, which is a NGO. The 
content of Wikipedia is available under the terms of the GFDL. It is 
run by a software called wikimedia which is free software as well. 
Wikipedia carries no adds. You'll occasionally see there a call for 
donations.

 what is left for the developer?
 
 Is there someone who can give a lecture on the subject?
 Are there more people interested in the subject?

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Re: [Haifux] UBUNTU instalation

2008-09-10 Thread Tzafrir Cohen
On Thu, Sep 11, 2008 at 02:00:44AM +0300, Dave Roi wrote:
 Upon second thought, It seems very logical that a Save full state file
 will contain the same installation tags as the original (Manually installed
 as opposed to a dependency).
 I don't know this for certain but I believe automatic dependency deletion
 should still work on the target machine.
 
 Just seems very logical to me.
 Anyways, checking this shouldn't be hard.
 
 Anyways, I still recommend using ghost to copy machines instead of these
 mass apt-get methods.
 Ghost gives you the option of doing other customizations besides the package
 list, such as editing configuration files, changing themes, gconf settings,
 aliases etc...
 Linux also has the advantage that it doesn't require a different image file
 for each different hardware type.
 Just make sure the hard drive you create the image on is the smallest of all
 the target hard drives.

But then you don't know what those customizations are, and can't
reproduce them when you need to do a small change.

E.g. install the same configuration in ain a few monthes. Recall that
the D-I system already install security updates at system install time,
as they use apt to install packages.

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Re: [Haifux] More information about latest OpenSSL/OpenSSH/OpenVPN vulnerabilities?

2008-05-18 Thread Tzafrir Cohen
On Wed, May 14, 2008 at 03:15:18PM +0300, Dotan Cohen wrote:
 2008/5/14 Eli Billauer [EMAIL PROTECTED]:
   What really beats me, is why the original bug (consuming uninitialized
   data) wasn't fixed in the main branch in the first place (which, I
   understand, happened at a later stage) rather than in a local patch.
 
 
 Debian does not often push patches upstream. This was widely discussed
 in the relevant /. article. It's a great read:
 http://it.slashdot.org/article.pl?sid=08/05/13/1533212 (as posted
 earlier in the thread)

And you actually believe everything they write on Slashdot?

(That is to say: no decent references over there)

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Re: [Haifux] Journalized filesystem question

2008-02-22 Thread Tzafrir Cohen
On Fri, Feb 22, 2008 at 11:48:16AM +0200, Baruch Even wrote:
 Hai Zaar wrote:

  In other words, is there any time during the life
   of a disk running a journalized filesystem when the filesystem is
   practically corrupted?
 
 Theoretically this should only happen due to bugs 

Or due to a physical damage to the disk.

 and should be extremely rare.

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Re: [Haifux] Simulated permissions on VFAT

2008-02-07 Thread Tzafrir Cohen
On Wed, Feb 06, 2008 at 01:55:49PM -0800, Alon Altman wrote:
 Another option (poor man's fakeroot) is to write a script that uses
 'find' to create a script that restores the permissions.

Poor man's rpm, actually. fakeroot forgets things eventualy.

But what about other archivers? Any archiver that preserves unix
permissions (like tar) but allows in-place changing (like zip and
uncompressed tar)?

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Re: [Haifux] Lecture proposal : how Ethernet works ?

2008-02-06 Thread Tzafrir Cohen
On Wed, Feb 06, 2008 at 09:25:43AM +0200, Shahar Dag wrote:
 Hi Near
 
 I will be glade to here such lecture.
 It will be grate if you explain a bit about how to use ethereal.
 Please noteice that sniffing of the cs network might not be welcomed by the 
 system team of cs

No sniffing of the network allowed (at lecture time)? So it's not as
fun.

I guess that the alternatuve is to build our own network for
demonstrations.

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Re: [Haifux] Accessing Mozilla mail files

2005-07-02 Thread Tzafrir Cohen
On Sat, Jul 02, 2005 at 12:06:58PM +0200, Eli Billauer wrote:

 1. Mozilla runs on a Windows 2000 computer, and Spamassassin on the 
 Linux one, interfacing with Samba. If I open any mail archive file (for 
 read) from the Linux machine, Mozilla rebuilds the folder next time 
 I'll access that folder. That's a headache.

Interface with imap and store with your custom storage on the server?

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Re: [Haifux] dvorak and hebrew

2005-06-21 Thread Tzafrir Cohen
On Tue, Jun 21, 2005 at 04:25:44PM +0300, Michael Vasiliev wrote:
 On Tuesday June 21 2005 00:24, Tzafrir Cohen wrote:
  Hi
 
  To answer a question from the lecture:
 
  I haven't tried it myself, but frankly I can't see any conflict between
  the Israeli layout and the Dvorak layout. Try something like:
 
setxkbmap dvorak,il
 The default layout for il is il(basic), at least it's what I see on my screen 
 ATM.
 
 
  One minor conflict is between the si1452 variant and dvorak with the
  keys for {}. But:
 
  * This is not the only layout that has conflicts with the si1452
variant. Practically any non-default layout has similar conflicts
 
  * you use lyx and not si1452, right?
 
 No.
 si1452 inherited the AD11, AD12 conflict from il(basic) layout, note the
  include pc/il(basic) line. 

In the basic layouts AD11 and AD12 remap only group 1. That is: they
only change they layout when you use a hebrew keymap. The Hebrew layout
is indeed a qwerty one. If you wish to provide a better one, please do.

 Then, it overwrites the conflicting lines to 
 provide some third-level key mappings. So the si1452 does not have the 
 problem and the basic layout is the one to blame here, more specifically the 
 part labelled parens mirroring. On the other hand, lyx layout seems to have 
 the same issue, once you try: setxkbmap dvorak,il(lyx), you have three 
 (sic!) braces, two right ones and one left, which is even more confusing for 
 a novice. That is because lyx layout overwrites the AD11 (minus/underscore) 
 to provide third-level holam key.

Have you actually tried it?

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[Haifux] dvorak and hebrew

2005-06-20 Thread Tzafrir Cohen
Hi

To answer a question from the lecture:

I haven't tried it myself, but frankly I can't see any conflict between
the Israeli layout and the Dvorak layout. Try something like:

  setxkbmap dvorak,il

One minor conflict is between the si1452 variant and dvorak with the
keys for {}. But:

* This is not the only layout that has conflicts with the si1452
  variant. Practically any non-default layout has similar conflicts

* you use lyx and not si1452, right?

For reference:

/etc/X11/xkb/symbols/pc/dvorak
/etc/X11/xkb/symbols/pc/il
/etc/X11/xkb/symbols/pc/us

(Dan: any comments?)

If you want to experiment with dvorak, don't forget that X's keymap and
the console keymap are seperate. Be sure to configure both of them.

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Re: [Haifux] What encoding ?

2005-06-08 Thread Tzafrir Cohen
On Wed, Jun 08, 2005 at 07:52:12PM +0300, Ron Artstein wrote:
 On Wed, 8 Jun 2005, Tzafrir Cohen wrote:
 
 What mail client do you use? Is it pine 4.44 on Aix 4? Any more 
 up-to-date mail client availble? (e.g: pine 4.5x, mutt 1.4/1.5)
 
 ISO-8859-8-i has the sam characters as ISO-8859-8, but implies 
 logical ordering of characters. ISO-8859-8 in mail-web implies 
 visual ordering, which is generally a bad idea.
 
 My experience is that bidi-aware mail clients treat iso-8859-8
 and iso-8859-8-i as equivalent and display both using logical 
 order. This is unlike the behavior of web browsers and might go
 against the standards, but is probably sensible given that most
 of the mail out there which identifies itself as iso-8859-8 is
 in fact in logical order.
 
 Of course this is irrelevant to pine, which not only is not 
 bidi-aware but not even charset-aware: as far as I understand,
 the only thing pine does with the charset header on an incoming
 message is compare it to its own definition, and issue a warning
 if they're different. Otherwise character handling is left to
 the terminal.

Pine has some charset-awareness. E.g: you can set some charset-dependent
filters and settings. This should have be improved in pine 4.5x . Pine
4.4x was still very problematic with regards to multi-byte (e.g: UTF-8)
support, though.

It's been long since I've used pine, though.

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[Haifux] [JobOffer] support a mail server

2004-12-16 Thread Tzafrir Cohen
Hi

I'm looking for someone to provide support for a small to meduim size
mail server on my Kibbutz's LAN. Please contact me for further details:

mobile: 050-7952506
icq: 16849755
email: [EMAIL PROTECTED]

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Re: [Haifux] /etc/fstab

2004-09-26 Thread Tzafrir Cohen
On Sun, Sep 19, 2004 at 11:39:58AM +0100, [EMAIL PROTECTED] wrote:
 i added the line :
/dev/hda5/mnt/boxvfatrw,auto,users1   0  
 to /etc/fstab
 so that normal user can mount /dev/hda5 and use it

The partition is already mounted at boot time. replace 'auto' with
'noauto'. But also see below.

 without beeing root
 but still when trying mount /dev/hda5 /mnt/xbox
i get  mount : only root can do that
 though i can still umount it after root have done so
 but even if root mounts the partition a normal
 user can't read from it
 so how do i get normal user to use /dev/hda5 ?

If that is what you need:

1. create a group of all the users that should be able to read and write
   to the partition (if there isn't such a group already) . I assume
   that this group is users

2. In the option field put:

   gid=users,umask=770

(rw and auto are default options, no need to mention them)

And while you're at editing that fstab line, add 'utf8' as well, to
avoid any unnecessary problems with Hebrew file names (assuming that
your locale settings are sane)

It is also advised that you change the '1' there to '2' , or even to '0'
. This is the priority of fsck checking at boot time.

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[Haifux] Re: Microsoft registered a patent for switching between links via the 'Tab' key

2004-09-18 Thread Tzafrir Cohen
On Sat, Sep 18, 2004 at 09:36:36PM +0300, Adir Abraham wrote:
 The name of the patent - Discoverability and navigation of hyperlinks via
 tabs
 
 Suggested patents: pressing an X box to close a window, pressing the enter
 key to start a new line, and even - pressing ctrl-alt-del to manually
 restart (if possible) after a BSOD :)
 
 The article about this is found here:
 http://www.ynet.co.il/articles/0,7340,L-2978322,00.html
 
 The full document of the patent is found here:
 http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1Sect2=HITOFFd=PALLp=1u=/netahtml/srchnum.htmr=1f=Gl=50s1=6,785,865.WKU.OS=PN/6,785,865RS=PN/6,785,865
 

It appears that lynx is not a prior art to this patent, do to claim 3:

  3. The method of claim 2 wherein, the visual indication is a curved
  focus shape. 

This patent is thus exteremly easy to bypass. Thus I suspect that this
claim and claim 6(e) were added to bypass existing prior art.

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Re: [Haifux] xkb, Hebrew and caps lock

2004-08-05 Thread Tzafrir Cohen
On Wed, Aug 04, 2004 at 11:27:56AM +0300, Eyal Rozenberg wrote:
 I've been trying to duplicate the Windows keyboard behavior with xkb, 
 with only partial success. Having read this:
 
 http://iglu.org.il/faq/cache/86.html
 
 I've managed to configure group toggling using Alt+Shift, to make apps 
 ignorant of whether or not I'm in the 'il' or 'us' group for the 
 purposes of Ctrl+something interpretation, to have the numpad keys 
 function as arrows when NumLock isn't pressed (even when Shift is 
 pressed), and even to get Nikkud sort of working (using RCtrl as a third 
 level switcher and the si1452 variant).
 
 What I would like to be able to do, and hope someone else has done and 
 can help me with the configuration of, is the following:
 
 (high priority) change the behavior of CapsLock so that when I'm in the 
 'il' group, with CapsLock 'on' state, and Shift and RCtrl unpressed, 
 typing letters will emit capitalized latin letters (e.g. by switching to 
 us group, level two).

have you tried the one of the options caps:shift_nocancel and
caps:internal_nocancel ?

For some reason it does not work for me, though.

 (low priority)  make an additional change in the behavior of Shift and 
 CapsLock, so that if CapsLock is 'on', Shift is a switch for third 
 level, and if CapsLock is not 'on', Shift is a group toggler.

Have a look at /etc/X11/xkb/types/caps . Maybe try changing the line:

   map[Shift+Lock] = Level2;

to:

   map[Shift+Lock] = Level3;

 
 Both of these are definitely tricky and may not even be possible without 
 breaking some xkb principles; if this is the case, do say so. Any other 
 thoughts/suggestions on this matter are welcome.
 
 Eyal
 
 PS - right now I'm using
 
 setxbkmap -option 
 grp:switch,grp:shift_toggle,srvrkeys:none,numpad:microsoft,lv3:switch 
 us,il -variant ,si1452
 

I'd add:

-model pc104
(just in case this is not set in your xorg.conf). This should allow you
to use key combinations with the windows and menu keys. I also
rather use grp:win_switch that grp:switch , as it gives me a switch key
on both sides of the keyboard (just like the shift key).

 or its xorg.conf equivalent.
 
 
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Re: [Haifux] rpm segfault

2004-04-04 Thread Tzafrir Cohen
On Sun, Apr 04, 2004 at 12:45:07PM +0200, Maor Meir wrote:
 Hi,
   I am running mandrake 8.1, and practicly anything I do with rpm
 ends in a segmentation fault. I have managed installing a few packages
 with urpmi successfully but when I try installing external packages
 with rpm I get a segmentation fault.

'rpm -q rpm' as a non-root user works?

What is the version of rpm and of glibc?

ls -l /var/lib/rpm

 also when trying to remove packages rpm -e I get a seg-fault.
 when installing/updating dependency checking and preperation of the
 packages work fine and after that it fails.
 I have tried rpm --rebuilddb which didn't do any good.
 I have tried installing/removing several freeciv rpms and several mysql
 rpms all had the same results. while urpmi still works fine.

Does it actually install? You should see progress bars, as it uses rpm
-[iU]vh to install packages.

 
 what does urpmi do diffrently?
 how does one debug rpm? (I would rather avoide compiling rpm with debug
 symbols and debugging it as one of my own)

Two useful tracing tools:

strace, rpm -vv

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Re: [Haifux] rpm segfault

2004-04-04 Thread Tzafrir Cohen
On Sun, Apr 04, 2004 at 05:53:42PM +0200, Maor Meir wrote:
 
 
 On Sun, 4 Apr 2004, Tzafrir Cohen wrote:
 
  On Sun, Apr 04, 2004 at 12:45:07PM +0200, Maor Meir wrote:
   Hi,
   I am running mandrake 8.1, and practicly anything I do with rpm
   ends in a segmentation fault. I have managed installing a few packages
   with urpmi successfully but when I try installing external packages
   with rpm I get a segmentation fault.
 
  'rpm -q rpm' as a non-root user works?
 
 Yes rpm -q works fine:
 
  What is the version of rpm and of glibc?
 rpm-4.0.4-19mdk

 glibc-2.3.2-14mdk

Where is it from? Any chance this version has NPTL support?

 
  Does it actually install? You should see progress bars, as it uses rpm
  -[iU]vh to install packages.
 
   what does urpmi do diffrently?
   how does one debug rpm? (I would rather avoide compiling rpmwith debug
   symbols and debugging it as one of my own)

If the above is true, check its environment for LD_ASSUME_KERNEL
(/proc/ID/env) . Though I figure this is not that.

 
  Two useful tracing tools:
 
  strace, rpm -vv
 
 strace I already tried before ddn't seem very usefull,
 rpm -Uvvh MySQL-server-5.0.0-0.i386.rpm
 gave the followinf output:
 ...snip...
 D: closed   db index   /var/lib/rpm/Depends
 D: == recording tsort relations
 D: == tsorting packages (order, #predecessors, #succesors, tree,
 depth)
 D: 00100  MySQL-server-5.0.0-0
 D: installing binary packages
 Preparing...###
 [100%]
 D: Expected size: 12448671 = lead(96)+sigs(149)+pad(3)+data(12448423)
 D:   Actual size: 12448671
 D:   install: MySQL-server-5.0.0-0 has 164 files, test = 0
 Segmentation fault (core dumped)

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Re: [Haifux] License of Haifux lectures

2004-02-28 Thread Tzafrir Cohen
On Sat, Feb 28, 2004 at 02:49:14PM +0200, Shachar Shemesh wrote:

 Well, such a license would not be free. I do not recall, however, that 
 releasing the lecture slides under a free license was a prerequisit to 
 giving a Haifux lecture.

One practical test applies here:

Can I use code snippents from the lecture slides/notes in my free
program?

And specifically: can I use them in a GPL-ed program?

The GFDL has such an issue.

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Re: [Haifux] static link with glibc2.2 segfaults on systems with glibc 2.3

2003-12-03 Thread Tzafrir Cohen
On Wed, Dec 03, 2003 at 12:37:48PM +0200, Mark Silberstein wrote:
 Hi all,
 can anyone explain, why statically linked binaries from glibc2.2 systems
 segfault on glibc2.3 systems? If the link is static, doesn't it mean
 that binary compatibility between the systems is sufficient to run the
 executable?
 Mark

strace them. I recall somethingregarding a different nsswitch
interface (/lib/nss* ) which is loaded via ldopen after readin
/etc/nsswitch. I believe that this is why /bin/rpm is not statically
linked on RH9.

For one specific use I was able to get away with using a different libc
altogether (uClibc for producing the ultimatly static busybox)

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Re: [Haifux] Re: failed dependencies...

2003-11-20 Thread Tzafrir Cohen
On Thu, Nov 20, 2003 at 02:19:21PM +0200, Alon Altman wrote:
 On Wed, 19 Nov 2003, John Doe wrote:
 
  Hello..
  I've encounters a problem while installing he updates cd...
  The msg is:
   error: Failed dependencies:
  /boot/vmlinux-2.4.20-20.9 is needed by
  alsa-kmdl-2.4.20-20.9-0.9.7b-10.rh9.at
  /boot/vmlinux-2.4.20-20.9 is needed by
  strictdep-kernel-kmdl-2.4.20-20.9-1-1.rh9.at
  mozilla = 35:1.2.1 is needed by (installed) galeon-1.2.7-3 

You seem to have a custom kernel package. Is it up-to-date? Where did
you get it from? You should probably avoid upgrading the kernel. maybe
install a new kernel (rpm -ivh, as opposed to Uvh. I think apt-rpm has
an exception mechnism just for that).

 
 Please remove galeon by typing rpm -e galeon, and pelase mail us the
 output of uname -a. You should be able to install most of the packages
 using rpm -Uvh /mnt/cdrom/Additions/all/*.rpm.

This would remove the custom kernel. Also: why not 'rpm -Fvh *.rpm' to
avoid installing unnecessary packages?

 
  I's be glad if you'd be able to help me..
  BTW, right after the initial installation, my gnome panel crashed and will
  not reopen...
  also, i'm unable to do the rpm --rebuilddb action on account of the error
  msg prited saying:
   error: db4 error(16) from dbenv-remove: Device or resource busy 

Is there any rpm process running on your system?

ps faxww | grep rpm


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Re: [Haifux] Hebrew LaTeX-generated PDFs in Acrobat Reader

2003-11-09 Thread Tzafrir Cohen
On Sun, Nov 09, 2003 at 05:40:08PM +0200, Shlomi Fish wrote:
 
 Hi!
 
 Can anyone give me a step by step tutorial on how to make my Hebrew
 Latex-generated PDFs not look like crap on Acrobat Reader and not have
 blocks instead of the many mathematical signs?
 
 Namely, my fonts are blurry, and there are several signs that appear as
 grey blocks. I have the culmus fonts and the MS core fonts installed (and
 can install other fonts) so this isn't a problem.
 
 I'm using Mandrake 9.1, elatex and ps2pdf.

1. install ivritex from CVS , or recent snapshot from
   http://iglu.org.il/pub/Hebrew/HebLatex/

Hebrew should then default to postscript fonts (Culmus), and should look 
well on PDF.

As for the rest: I don't recall, sorry.

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Re: [Haifux] Resizing NTFS problem

2003-10-09 Thread Tzafrir Cohen
On Wed, 8 Oct 2003, Maor Meir wrote:



 On Wed, 8 Oct 2003, Slava Shklyar wrote:

  Try Partition Magic ...
  Also, if you are going to install Linux, some distributions have own
  partition tools with NTFS support ...

 To the best of my knowledge there is only one free software
 ntfs resize tool, and their are various frontends for it,
 Mandrake now has a frontend, and QTparted knows how to use it
 and probably several more.

 ntfsresize currently does not support resizing fragmented partitions.

Actually, qtparted seems to use ntfsresize (or the same code) for resizing
NTFS partitions.

I recently had exactly the same problem (fragmanted partition) with
ntfsresize .  ntfsresize gave me an error , and suggested to use XP's
defrag. defrag turned out to be quite lousy: only after clearing out some
more free disk space (~5GB instead of ~2.5GB) I could get it to defrag all
the files. I still had one fragmanted directory, and a fragmanted MFT
which seemed impossible to get reed of.

Like Eli, I configured the syste,m not to use virtual memory.

And still I got that error.

The software is ntfs tools 0.51 (?) of knoppix 3.2 (22-9).

qtparted seemed to have some problems with that partition.

(and of course: resizing the filesystem is only the first stage. One has
to be careful later when resizing the partition itself).

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Re: [Haifux] recomendations for free format presentation creators

2003-10-07 Thread Tzafrir Cohen
On Tue, 7 Oct 2003, Ron Artstein wrote:

  I have updated http://www.haifux.org/givelecture.html to
  include a list of tools which create free-format presentations.

 An alternative to the LaTeX - dvips - ps2pdf route is using
 PDFLaTeX, which creates PDF files directly from LaTeX sources.

Prosper is the most common latex-based lecture format. It can be used to
produce fancy slides (e.g. mulix's later slides, IIRC).

A simpler method is to use seminar (prosper is actually based on seminar).

Both can be used to create sort of animations. (it is actually more
straight-forward with prosper).

Hebrew support can be easier with seminar, because with prosper you have
to mess with the postscript issues. Another shortcoming of prosper is that
the dvi preview isn't useful. But the atvantratge of the ready-made
layouts is actually quite huge. Should I try to add a hebprosper style to
the hebclass of ivritex?


 An advantage of PDFLaTeX is that it allows embedding of PNG and
 JPG images in the PDF file; this is how I got the penguins and
 sponsors logos into the W2L promotional materials. As far as I
 know dvips doesn't support these formats.


to embed graphics with standard latex you have to convert it to eps
('pngtopnm | pnmtoeps' or whatever)

 On the other hand, to my knowledge PDFLaTeX does not support the
 importation of EPS graphics, nor does it support the package
 pstricks, both of which are supported by dvips.

I think that there's something called pdftricks

 I've been told
 that prosper depends on pstricks so it doesn't work with PDFLaTeX.

It is being actively used with pdflatex, AFAIK.
But so far I haven't got around to configure it on my system...

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Re: [Haifux] ksyms as an indicator for existence in the kernel

2003-06-22 Thread Tzafrir Cohen
On Sun, Jun 22, 2003 at 06:31:49PM +0200, Eli Billauer wrote:
 Hello all,
 
 I've started a small adventure of installing Linux on an old laptop. It 
 appears as if some chipset is buggy (82437MX), as it's listed in the 
 pci/quirks.c file with a fix.
 
 Reading that quirks file, I see that a kernel message should have been 
 generated, but it wasn't. So I wanted to see if that part (module or 
 compiled-in) was in the game at all.
 
 I looked for some non-static function in quirks.c, and found 
 pci_fixup_devices. So off I went to the laptop which runs this kernel 
 and did:
 
 grep fixup /proc/ksyms
 
 and got nothing.
 
 Is there any chance that the function was executed, and the freed, or is 
 this a 100% indication that I should try to change my kernel 
 configuration, and recompile?
 
 I'm running a 2.4.21 kernel, BTW.

When you speak about such problems, the following would have been handy:

  http://www.it.uc3m.es/~ptb/proconfig/

SuSE have something similar in their default kernels (/proc/config.gz ).
This means that you don't have to guess what was the config your kernel
was compiled with: you [z]cat /proc/config[.gz] .

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