Re: Using SSH keys without havint to type a passphrase

2008-02-17 Thread Erez D
#generate keys:
ssh-keygen -t dsa
#copy to destenation
scp .ssh/id_dsa.pub target_machin:/path to home/.ssh/authorized_keys2
#(actually you should append to destenation instead of copying to it)


erez.

On Feb 16, 2008 1:40 PM, Geoff Shang [EMAIL PROTECTED] wrote:

 Hi,

 First, thanks to everyone who made suggestions re incremental backups.
 I've not looked into every suggestion, but have so far decided to go with
 duplicity as it appears to take care of all the physical backup files so I
 don't need to know how it's all stored and how to get at a particular
 backed up file - it takes care of that for me.

 I've now hit a problem with SSH keys however.  Duplicity needs to be able
 to conect via SSH without needing a password or passphrase, as there seems
 to be no way to specify it.  At any rate, I want this to be automated.

 Since I'm new to the world of keys, I've done a bit of experimenting.  I
 did have logins from my home machine to the target machine working
 properly
 at one stage.  But then I tried setting it up from the machine to be
 backed
 up and found that it always wanted the passphrase, and now my home machine
 does too.

 If it is relevant, the target machine is running Ubuntu Feisty openssh
 1:4.3p2, the source machine is running Fedora 7 (not sure which version of
 ssh) and my home box is mostly running Debian Woody with OpenSSH 1:3.4p1.

 I'm using FTP instead for now but would rather do this securely.

 Any ideas?  Do I have to use the agent for this or is there some way to
 make this happen reliably without it?

 Geoff.

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LVM2 snapshots questions missing from their FAQ :)

2008-02-17 Thread Ira Abramov
After much searching on Google, a few questions remain open:

a. Assuming I can take multiple snapshots of the same volume (I think
this was not possible in LVM1), won't it slow down the disks like crazy?
If I have a weekly, nightly and a noon snapshots of a volume, I could
end up with some write operations becoming a read and four writes per
block at the worst case! does that make sense?

b. I see that snapshots can only take up space in the same VG as their
original volume, so unless I'm careful with sizes and spans, I'm bound
to get the snapshots on the same physical disk as the original LV. Is
this a major hit on performance as well, or is it negligable in most
cases?

c. my snapshots will always be RO, and as such I intend to mark them as
read-only LVs, but should I also mount them RO? does it matter?

Thanks!

-- 
Tin foil hat wearer
Ira Abramov
http://ira.abramov.org/email/

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Re: LVM2 snapshots questions missing from their FAQ :)

2008-02-17 Thread Yedidyah Bar-David
On Sun, Feb 17, 2008 at 10:26:24AM +0200, Ira Abramov wrote:
 After much searching on Google, a few questions remain open:
 
 a. Assuming I can take multiple snapshots of the same volume (I think
 this was not possible in LVM1), won't it slow down the disks like crazy?
 If I have a weekly, nightly and a noon snapshots of a volume, I could
 end up with some write operations becoming a read and four writes per
 block at the worst case! does that make sense?

Not much sense, but this is how it is. For a to-be alternative, see
Zumastor. I did not try it, but it seems promising.

 
 b. I see that snapshots can only take up space in the same VG as their
 original volume, so unless I'm careful with sizes and spans, I'm bound
 to get the snapshots on the same physical disk as the original LV. Is
 this a major hit on performance as well, or is it negligable in most
 cases?

I don't know. But I see no problem having more than one disk in a VG.
Simply create a PV on a new disk and add it to the VG. I even think that
if you first the master LV to completely fill the VG (that uses e.g.
an entire disk/PV) and then add another PV/disk and create snapshots in
this VG, you know for certain they'll reside on the added disk/PV, as
you seem to want. I can't say it's obvious for me that this will give
the highest performance - it might be better to spread master/snapshots
some other way (at random or planned). If you do try testing this, it
will be nice to see results.

 
 c. my snapshots will always be RO, and as such I intend to mark them as
 read-only LVs, but should I also mount them RO? does it matter?

I have no idea. I guess I'd mount them RO anyway, both to be extra safe
and e.g. to avoid setting atimes etc.
-- 
Didi


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Re: Using SSH keys without havint to type a passphrase

2008-02-17 Thread Moshe Gorohovsky

Hi List,

Erez D wrote:

#generate keys:
ssh-keygen -t dsa
#copy to destenation
scp .ssh/id_dsa.pub target_machin:/path to home/.ssh/authorized_keys2
#(actually you should append to destenation instead of copying to it)


erez.

I second the solution that Erez had suggested.
What are advantages and disadvantages of other solutions over
this plain ssh usage?


On Feb 16, 2008 1:40 PM, Geoff Shang [EMAIL PROTECTED] 
mailto:[EMAIL PROTECTED] wrote:


Hi,

First, thanks to everyone who made suggestions re incremental backups.
I've not looked into every suggestion, but have so far decided to go
with
duplicity as it appears to take care of all the physical backup
files so I
don't need to know how it's all stored and how to get at a particular
backed up file - it takes care of that for me.

I've now hit a problem with SSH keys however.  Duplicity needs to be
able
to conect via SSH without needing a password or passphrase, as there
seems
to be no way to specify it.  At any rate, I want this to be automated.

Since I'm new to the world of keys, I've done a bit of experimenting.  I
did have logins from my home machine to the target machine working
properly
at one stage.  But then I tried setting it up from the machine to be
backed
up and found that it always wanted the passphrase, and now my home
machine
does too.

If it is relevant, the target machine is running Ubuntu Feisty openssh
1:4.3p2, the source machine is running Fedora 7 (not sure which
version of
ssh) and my home box is mostly running Debian Woody with OpenSSH
1:3.4p1.

I'm using FTP instead for now but would rather do this securely.

Any ideas?  Do I have to use the agent for this or is there some way to
make this happen reliably without it?

Geoff.

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--
Moshe Gorohovsky

A6 CC A7 E1 C2 BD 8C 1B  30 8E A4 C3 4C 09 88 47   Tk Open Systems Ltd.
---
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Re: Using SSH keys without havint to type a passphrase

2008-02-17 Thread Micha Silver

Erez D wrote:

#generate keys:
ssh-keygen -t dsa
#copy to destenation
scp .ssh/id_dsa.pub target_machin:/path to home/.ssh/authorized_keys2
#(actually you should append to destenation instead of copying to it)

And make sure 'authorized_keys2 ' is NOT readable or writable by anyone 
except the user you're connecting as.

[EMAIL PROTECTED] ~]$ ll .ssh/authorized_keys
-rw-r-  1 mike mike 3424 Aug  6  2007 .ssh/authorized_keys


erez.



--
Micha Silver
Arava Development Co, Sapir, Israel
tel: +972(8)6592270
cell: +972(52)3665918


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OpenOffice in Israeli schools

2008-02-17 Thread Arie Skliarouk
...What this means is that if we expose students properly to the range of
options, they may prefer non-Microsoft products in the future.

http://www.haaretz.com/hasen/spages/939224.html

-- 
Arie


Re: List of Israeli Open-Source Projects

2008-02-17 Thread Ira Abramov
Quoting Shlomi Fish, from the post of Sat, 16 Feb:
 Hi all!
 
 I restored the list of Israeli open-source projects that used to be 
 maintained 
 at the Hackers-IL wiki and placed it on my home-site: 
 
 http://www.shlomifish.org/open-source/resources/israel/list-of-projects/

well, Mosix hasn't been FOSS for years, OpenMOSIX hasn't been touched by
Qlusters in years (and I have no idea if it's still active, worth
checking)

XParam - Miki moved to Australia a year ago, is this still an Israeli
project? :-)

What's Israeli about Better-SCM? It also seems to be very out of date
(no git for starters, and a lot of new details and issues solved in
newer versions are not mentioned)

Question: what happend to the iglu.org.il site and why is this list not
on a Wiki over there? or on
http://www.hamakor.org.il/content/view/52/56/

Last but not least, if we are talking websites, is Hamakor or anyone
doing anything about the shameful abuse taking place over at gnu.org.il?
it's the same guy who was abusing wordpress.org.il until a week ago.

-- 
Victim of circumstance
Ira Abramov
http://ira.abramov.org/email/

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Re: List of Israeli Open-Source Projects

2008-02-17 Thread Geoffrey S. Mendelson
On Sun, Feb 17, 2008 at 01:44:01PM +0200, Ira Abramov wrote:

 Last but not least, if we are talking websites, is Hamakor or anyone
 doing anything about the shameful abuse taking place over at gnu.org.il?
 it's the same guy who was abusing wordpress.org.il until a week ago.

And then randomly in his sig:

 -- 
 Victim of circumstance
 Ira Abramov
 http://ira.abramov.org/email/

(Sorry, I could not resist)

Geoff.


-- 
Geoffrey S. Mendelson, Jerusalem, Israel [EMAIL PROTECTED]  N3OWJ/4X1GM
IL Voice: (07)-7424-1667 U.S. Voice: 1-215-821-1838 
Visit my 'blog at http://geoffstechno.livejournal.com/

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Re: OpenOffice in Israeli schools

2008-02-17 Thread Michael Jaffe

--0-1127312071-1203259129=:74708
Content-Type: text/plain; charset=iso-8859-1
Content-Transfer-Encoding: 8bit

Can anyone provide a link to a Hebrew version of this article?

Thanks

Arie Skliarouk [EMAIL PROTECTED] wrote: ...What this means is that if we 
expose students properly to the range of options, they may prefer non-Microsoft 
products in the future.

http://www.haaretz.com/hasen/spages/939224.html

-- 
Arie

 



J. Michael Jaffe, Ph.D.
EMAIL: [EMAIL PROTECTED]
PHONE: +972 4 6398160
FAX (ISRAEL): +972 153 4 6398160
FAX (US): 1-419-781-4486
   
-
Looking for last minute shopping deals?  Find them fast with Yahoo! Search.
--0-1127312071-1203259129=:74708
Content-Type: text/html; charset=iso-8859-1
Content-Transfer-Encoding: 8bit

Can anyone provide a link to a Hebrew version of this 
article?brbrThanksbrbrbiArie Skliarouk lt;[EMAIL 
PROTECTED]gt;/i/b wrote:blockquote class=replbq style=border-left: 2px 
solid rgb(16, 16, 255); margin-left: 5px; padding-left: 5px; span 
class=t13...What this means is that if we expose students properly to the 
range of options, they may prefer non-Microsoft products in the 
future.brbr/spana 
href=http://www.haaretz.com/hasen/spages/939224.html;http://www.haaretz.com/hasen/spages/939224.html/abr
 clear=allbr-- brAriebrbr 
/blockquotebrBRBRbrJ. Michael 
Jaffe, Ph.D.brEMAIL: [EMAIL PROTECTED]brPHONE: +972 4 6398160brFAX 
(ISRAEL): +972 153 4 6398160brFAX (US): 1-419-781-4486p#32;
  hr size=1Looking for last minute shopping deals? a 
href=http://us.rd.yahoo.com/evt=51734/*http://tools.search.yahoo.com/newsearch/category.php?category=shopping;
 
Find them fast with Yahoo! Search./a
--0-1127312071-1203259129=:74708--

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Re: List of Israeli Open-Source Projects

2008-02-17 Thread Shachar Shemesh

Ira Abramov wrote:


XParam - Miki moved to Australia a year ago, is this still an Israeli
project? :-)
  
There is a question of how such a list should treat dead projects. Roni 
has been as active on XParam as Miki (and still lives in Israel, as far 
as I know). Neither have done much development on it for some time now.

Question: what happend to the iglu.org.il site
I thought it was too out of focus and out of date, so I did not bring it 
back up after the server move. I still have it in backup if anyone is 
interested in salvaging the good stuff from there. The only offer of 
help I had in that respect was from someone who saw it as an 
unconditional prerequisite that they:
1. Bring the ENTIRE site back, out of date stuff and all, to exactly the 
same way it looked before

AND
2. They get root access.

Since neither conditions were acceptable to me, said person was given 
sufficient permissions to access the backups, change the site on 
hamakor.org.il both in the file level and at the Joomla level. Aside 
from bitching on the mailing lists that they do not have sufficient 
permissions, no actual constructive work was done, so the site is down 
pending someone who cares enough to bring it back up. If anyone else is 
interested in salvaging the information from there, please contact me 
off list.

 and why is this list not
on a Wiki over there? or on
http://www.hamakor.org.il/content/view/52/56/
  
That is up to Shlomi to answer. He has permissions to edit the page you 
mention.

Last but not least, if we are talking websites, is Hamakor or anyone
doing anything about the shameful abuse taking place over at gnu.org.il?
it's the same guy who was abusing wordpress.org.il until a week ago.
  
I had a look, and am frankly a bit at a loss as to what to say. I work 
according to the principle of judge the site, not the person behind 
it. The site does have SOME useful stuff in it (I don't know where it 
came from, or whether it was taken with permission). I also did not see 
any blatant misleading statements of authorization or of being official. 
As such, I'm not sure there is anything we CAN do.


If you find anything on the site that makes the reader believe that it 
is an official site, or if you wrote one of the translated articles 
there and you believe your copyright was violated, then Hamakor can help 
you. Otherwise, it's better to not draw additional traffic there and let 
it be.


Just my humble opinion, of course. You are all free to try and change my 
mind (or convince other people otherwise).


Shachar

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Re: Recommendations for incremental backups

2008-02-17 Thread Ira Abramov
Quoting Amos Shapira, from the post of Thu, 14 Feb:
 On Wed, Feb 13, 2008 at 4:04 PM, Eran Tromer [EMAIL PROTECTED] wrote:
 
  Better yet, you don't need to run anything other than 'tar' as root.
  Just put the 'tar czf - /home' command in a suid-root binary that's
  executable only be a dedicated user, say [EMAIL PROTECTED], and then:
  $ rexecsync -v 'ssh [EMAIL PROTECTED]' 'path-to-suid' /backups/client.tgz
 
 
 Actually, the Right Way(TM) to do this is to setup an account with a
 public key which can only execute this command specified with the command=

that limits the actions on the remote machine, but doesn't solve the
problem of an UN-encrypted key.

one mid-way solution is running an ssh-agent for that task and keeping
its environment settings in a shell file for the task to source each
time it is invoked. it's suboptimal since you still keep the key
UN-encrypted in RAM and you need to add the key to the agent after a
reboot, but those are the same concessions you do with an Apache's SSL
key as well.

-- 
Village idiot
Ira Abramov
http://Ira.Abramov.org/email/

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Re: List of Israeli Open-Source Projects

2008-02-17 Thread Kohn Emil Dan

Hi,

AFAIK Qlusters no longer develops openmosix.
You might add LKVM (Linux Kernel Virtual Machine)

http://kvm.qumranet.com

which is/was developed by Quramnet (www.quramnet.com)

Emil


On Sat, 16 Feb 2008, Shlomi Fish wrote:


Hi all!

I restored the list of Israeli open-source projects that used to be maintained
at the Hackers-IL wiki and placed it on my home-site:

http://www.shlomifish.org/open-source/resources/israel/list-of-projects/

Any additions or corrections would be welcome, so please send them to me at
[EMAIL PROTECTED] .

Regards,

Shlomi Fish

-
Shlomi Fish  [EMAIL PROTECTED]
Homepage:http://www.shlomifish.org/

I'm not an actor - I just play one on T.V.
___
Discussions mailing list
[EMAIL PROTECTED]
http://hamakor.org.il/cgi-bin/mailman/listinfo/discussions



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using ffmpeg to create AVI files for Windows

2008-02-17 Thread Shlomo Solomon
I use the following command to transform and shrink files recorded on a DVD 
recorder to AVI files: 

ffmpeg -y -i /tmp/noa-001.vob -b 768 -s 640x480 -vcodec xvid -ab 128 -acodec 
aac -ac 2 -ab 64 -f mp4 /tmp/noa-1.avi

As expected, the AVI file plays properly on my Linux box. But I sent the file 
to a friend and it was not viewable in Windows XP (he tried Realplayer, Media 
player and several other programs).

I GOOGLEd a bit, but there are so many parameters available that I don't know 
what I'm looking for. I assume it has something to do with a CODEC, but would 
appreciate any suggestions.


--
Shlomo Solomon
http://the-solomons.net
Sent by KMail (KDE 3.5.7) on LINUX Mandriva 2008.0


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Re: List of Israeli Open-Source Projects

2008-02-17 Thread Shlomi Fish
Hi!

Thanks for your commentary.

On Sunday 17 February 2008, Kohn Emil Dan wrote:
 Hi,

 AFAIK Qlusters no longer develops openmosix.

I added a note about it. 

 You might add LKVM (Linux Kernel Virtual Machine)

 http://kvm.qumranet.com

 which is/was developed by Quramnet (www.quramnet.com)


Added, thanks.

Regards,

Shlomi Fish


   Emil

 On Sat, 16 Feb 2008, Shlomi Fish wrote:
  Hi all!
 
  I restored the list of Israeli open-source projects that used to be
  maintained at the Hackers-IL wiki and placed it on my home-site:
 
  http://www.shlomifish.org/open-source/resources/israel/list-of-projects/
 
  Any additions or corrections would be welcome, so please send them to me
  at [EMAIL PROTECTED] .
 
  Regards,
 
  Shlomi Fish
 
  -
  Shlomi Fish  [EMAIL PROTECTED]
  Homepage:http://www.shlomifish.org/
 
  I'm not an actor - I just play one on T.V.
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  [EMAIL PROTECTED]
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-- 

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Homepage:http://www.shlomifish.org/

I'm not an actor - I just play one on T.V.

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Re: using ffmpeg to create AVI files for Windows

2008-02-17 Thread Hetz Ben Hamo
Hi Shlomo,

You're coding Video with XVid and Audio with AAC, and unless the
Windows user has both of those codecs installed, he won't be able to
watch the video. I assume that he got XVID/DIVX codec installed (if he
played movies from the net), but I'm not sure he got AAC codec
installed (most of the time they are rarely encoded with AAC, most of
the time it's MP3 CBR or VBR), so I suggest you should encode with MP3
encoding.

640x480 resolution is bad resolution, and you should check whats the
source aspect-ratio of your original video and calculate the exact
resolution you want to encode it to.

Unless you're into advanced encoding (H.264, SNOW, Dirac), then I
would recommend your friend to install VLC on his windows machine and
play the video, it should play it pretty well, specially since VLC
mostly has the codecs built with it's install, so codecs issues will
probably disappear).

Thanks,
Hetz

On Sun, Feb 17, 2008 at 10:38 PM, Shlomo Solomon
[EMAIL PROTECTED] wrote:
 I use the following command to transform and shrink files recorded on a DVD
  recorder to AVI files:

  ffmpeg -y -i /tmp/noa-001.vob -b 768 -s 640x480 -vcodec xvid -ab 128 -acodec
  aac -ac 2 -ab 64 -f mp4 /tmp/noa-1.avi

  As expected, the AVI file plays properly on my Linux box. But I sent the file
  to a friend and it was not viewable in Windows XP (he tried Realplayer, Media
  player and several other programs).

  I GOOGLEd a bit, but there are so many parameters available that I don't know
  what I'm looking for. I assume it has something to do with a CODEC, but would
  appreciate any suggestions.


  --
  Shlomo Solomon
  http://the-solomons.net
  Sent by KMail (KDE 3.5.7) on LINUX Mandriva 2008.0


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-- 
Skepticism is the lazy person's default position.
my blog (hebrew): http://benhamo.org

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Re: List of Israeli Open-Source Projects

2008-02-17 Thread Shlomi Fish
On Sunday 17 February 2008, Ira Abramov wrote:
 Quoting Shlomi Fish, from the post of Sat, 16 Feb:
  Hi all!
 
  I restored the list of Israeli open-source projects that used to be
  maintained at the Hackers-IL wiki and placed it on my home-site:
 
  http://www.shlomifish.org/open-source/resources/israel/list-of-projects/

 well, Mosix hasn't been FOSS for years, 

And it is noted as such in the page.

 OpenMOSIX hasn't been touched by 
 Qlusters in years (and I have no idea if it's still active, worth
 checking)

Well, we still list projects of historical interest.


 XParam - Miki moved to Australia a year ago, is this still an Israeli
 project? :-)

Once an Israeli - always an Israeli. :-)


 What's Israeli about Better-SCM? 

Well, it was started by me, and is still primarily maintained by me.

 It also seems to be very out of date 
 (no git for starters, 

The omission of git is a well-known problem. The reason it's not there yet is 
because no one has volunteered to be its maintainer yet - submit a patch to 
the XML source of the comparison and maintain it into the future:

http://better-scm.berlios.de/contribute/#comprison_new_system

There were a few people who either expressed interest in doing so and many 
more who complained about it, but no one became a maintainer yet.

 and a lot of new details and issues solved in 
 newer versions are not mentioned)

Specific comments (or better yet - patches) are welcome.


 Question: what happend to the iglu.org.il site and why is this list not
 on a Wiki over there? 

The iglu.org.il site used to be present on eskimo.iglu.org.il and was not 
restored after the transition to tux.hamakor.org.il. We can still restore it, 
but I don't have control of the DNS domain, nor do I have access to a free 
hosting with sufficient permissions to set up all the old web-services 
properly. At the moment the situation is that all the old links are broken, 
which is the worst possible solution.

 or on 
 http://www.hamakor.org.il/content/view/52/56/

Because:

* The page is in Hebrew. The original list was in English, and I'd rather not 
translate it all to English at this point. (Although I'll be cooperative with 
someone who volunteers to do so and maintain it.).

* Since the list is in English the Hebrew layout of the page interferes with 
it. See for example:

http://www.hamakor.org.il/content/view/38/46/

* The URL is not very friendly or meaningful. (Minor problem).

* I'd really prefer it to be on a world-editable wiki.


 Last but not least, if we are talking websites, is Hamakor or anyone
 doing anything about the shameful abuse taking place over at gnu.org.il?

What problems do you see there?

Regards,

Shlomi Fish

-
Shlomi Fish  [EMAIL PROTECTED]
Homepage:http://www.shlomifish.org/

I'm not an actor - I just play one on T.V.

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Re: List of Israeli Open-Source Projects

2008-02-17 Thread Ariel Biener
On Sunday, 17 בFebruary 2008 09:46, Kohn Emil Dan wrote:

Are we only discussing Open-Source projects fully developed
by Israelis, or does this include stuff like for example, hebrew
pine/pico done by HUJI (the hebrew support coded by them
or added by them to PINE). This is of course not only translation
of the UI.

--Ariel
 Hi,

 AFAIK Qlusters no longer develops openmosix.
 You might add LKVM (Linux Kernel Virtual Machine)

 http://kvm.qumranet.com

 which is/was developed by Quramnet (www.quramnet.com)

   Emil

 On Sat, 16 Feb 2008, Shlomi Fish wrote:
  Hi all!
 
  I restored the list of Israeli open-source projects that used to be
  maintained at the Hackers-IL wiki and placed it on my home-site:
 
  http://www.shlomifish.org/open-source/resources/israel/list-of-projects/
 
  Any additions or corrections would be welcome, so please send them to me
  at [EMAIL PROTECTED] .
 
  Regards,
 
  Shlomi Fish
 
  -
  Shlomi Fish  [EMAIL PROTECTED]
  Homepage:http://www.shlomifish.org/
 
  I'm not an actor - I just play one on T.V.
  ___
  Discussions mailing list
  [EMAIL PROTECTED]
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-- 
 --
 Ariel Biener, CISO
 Tel-Aviv University CIT div.
 e-mail: [EMAIL PROTECTED] phone: 03-6406086
 PGP key:http://www.tau.ac.il/~ariel/pgp.html

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amsart and hebrew

2008-02-17 Thread Micha
Is it possible to mix amsart and hebrew?

If I try to use a theorem I get an error:

missing { inserted.
A left brace was mandatory here, so I've put one in.
You might want to delete and/or insert some corrections
so that I will find a matching right brace soon.
(If you're confused by all this, try typing `I}' now.)

=
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Re: List of Israeli Open-Source Projects

2008-02-17 Thread Ariel Biener
On Sunday, 17 בFebruary 2008 09:46, Kohn Emil Dan wrote:

Are we only discussing Open-Source projects fully developed
by Israelis, or does this include stuff like for example, hebrew
pine/pico done by HUJI (the hebrew support coded by them
or added by them to PINE). This is of course not only translation
of the UI.

--Ariel
 Hi,

 AFAIK Qlusters no longer develops openmosix.
 You might add LKVM (Linux Kernel Virtual Machine)

 http://kvm.qumranet.com

 which is/was developed by Quramnet (www.quramnet.com)

   Emil

 On Sat, 16 Feb 2008, Shlomi Fish wrote:
  Hi all!
 
  I restored the list of Israeli open-source projects that used to be
  maintained at the Hackers-IL wiki and placed it on my home-site:
 
  http://www.shlomifish.org/open-source/resources/israel/list-of-projects/
 
  Any additions or corrections would be welcome, so please send them to me
  at [EMAIL PROTECTED] .
 
  Regards,
 
  Shlomi Fish
 
  -
  Shlomi Fish  [EMAIL PROTECTED]
  Homepage:http://www.shlomifish.org/
 
  I'm not an actor - I just play one on T.V.
  ___
  Discussions mailing list
  [EMAIL PROTECTED]
  http://hamakor.org.il/cgi-bin/mailman/listinfo/discussions

 =
 To unsubscribe, send mail to [EMAIL PROTECTED] with
 the word unsubscribe in the message body, e.g., run the command
 echo unsubscribe | mail [EMAIL PROTECTED]

-- 
 --
 Ariel Biener, CISO
 Tel-Aviv University CIT div.
 e-mail: [EMAIL PROTECTED] phone: 03-6406086
 PGP key:http://www.tau.ac.il/~ariel/pgp.html

-- 
 --
 Ariel Biener
 e-mail: [EMAIL PROTECTED]
 PGP: http://www.tau.ac.il/~ariel/pgp.html

To unsubscribe, 
send mail to [EMAIL PROTECTED] with
the word unsubscribe in the message body, e.g., run the command
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Re: List of Israeli Open-Source Projects

2008-02-17 Thread Amos Shapira
On 18/02/2008, Shachar Shemesh [EMAIL PROTECTED] wrote:

 As such, I'm not sure there is anything we CAN do.


CAN implies to me that there is something you'd LIKE to do - what would it
be?
What would you like to change in that web site?
True - it's used by its owner to promote their business and some FOSS
translation project (the web site has an air of being a demo of their
translation abilities).

you. Otherwise, it's better to not draw additional traffic there and let
 it be.


How about cooperating with them? They put up a site, pay for the domain,
server and traffic and as much as I can read the site they sound like they
could be reasonable people - why not try to cooperate with them for
everyone's benefit?

Just my humble opinion, of course. You are all free to try and change my
 mind (or convince other people otherwise).


Ditto.

--Amos


Re: Using SSH keys without havint to type a passphrase

2008-02-17 Thread Amos Shapira
On 17/02/2008, Erez D [EMAIL PROTECTED] wrote:

 #generate keys:
 ssh-keygen -t dsa
 #copy to destenation
 scp .ssh/id_dsa.pub target_machin:/path to home/.ssh/authorized_keys2
 #(actually you should append to destenation instead of copying to it)


1. Be careful not to override your default key (in case you have one
already). Use a separate key for this job.
2. At least on Debian Etch and CentOS 5, there is ssh-copy-id to help you
transfer the public key conveniently.
3. Consider adding a command= parameter to the remote authorized_keys2
file to limit the commands which can be executed in case the private key
gets stolen. You can also limit the host from which the public key will be
accepted using the from= command. See man sshd.

--Amos


Re: LVM2 snapshots questions missing from their FAQ :)

2008-02-17 Thread Amos Shapira
On 17/02/2008, Ira Abramov [EMAIL PROTECTED] wrote:

 After much searching on Google, a few questions remain open:

 a. Assuming I can take multiple snapshots of the same volume (I think
 this was not possible in LVM1), won't it slow down the disks like crazy?
 If I have a weekly, nightly and a noon snapshots of a volume, I could
 end up with some write operations becoming a read and four writes per
 block at the worst case! does that make sense?


It appears so.

b. I see that snapshots can only take up space in the same VG as their
 original volume, so unless I'm careful with sizes and spans, I'm bound
 to get the snapshots on the same physical disk as the original LV. Is
 this a major hit on performance as well, or is it negligable in most
 cases?


Haven't tried this yet but have you noticed that you can pass a
PhysicalVolumePath to lvcreate (see the manual page, and
http://www.centos.org/docs/5/html/Cluster_Logical_Volume_Manager/LV_create.htmlfor
more details)?

BTW - be aware that, maybe a bit counter-intuitively, once you create a
snapshot you can change BOTH the original and the snapshot, maybe by
flipping your snapshots carefully you can decrease the amounts of duplicate
writes.

c. my snapshots will always be RO, and as such I intend to mark them as
 read-only LVs, but should I also mount them RO? does it matter?


I'm pretty sure you'll get a warning a-la read-only device when you try to
mount it read/write, similar to what you get when you load a CD-ROM without
the -ro flag.

Hmm - I wonder whether you can assign a DRBD device as a PV, then get the
snapshots sync'ed to another host as well, *wicked laugh*...

Please let us know what you found.

--Amos