Re: Quest for *nix C/C++ IDE

2005-09-05 Thread Gilboa Davara
On Sun, 2005-09-04 at 09:45 -0700, Nzer Zaidenberg wrote:
 Real developers (like me) use gvim and Makefiles like
 God intended us to work.

Amen to that!
vim + ctags. period.
We don't use-no-stinking-mouse around here! No sirrie!


 
 lesser beings...
 
 use slickedit or kdevelop.
 slickedit cost money but rumers says its worth it.
 
 personally i use vi and terminal and debug with dbx
 natively :-) but i guess this is not what sane people
 would use.
 
 
 Emacs is also a good choice but was made for people
 with 6 fingers in every hand (one is always required
 for the META key :-). 
 
 --- Michael Sternberg [EMAIL PROTECTED] wrote:
 
  Hello
  
  We're looking for recomendations on *nix IDE.
  
  Following virtues are seeked:
  1. Multiplatform. We will develop on Linux and
  SunOS. Maybe AIX and HP in 
  the future.
  2. Truly integrated. That is, good editor, source
  browser and visual 
  debugger in one bottle. Never mind that it will use
  external utilities 
  like ctags/make/CC/dbx/gcc/gdb/gprof underneath.
  Even better if it will be 
  able to use multiple external compilers or
  debuggers.
  3. Good multithreading support is a MUST.
  4. Reasonably light, does not demand very much
  resources.
  5. Does not demand installing additional heavy
  packages (like KDE for 
  KDevelop)
  6. Not beta version or something - we're looking
  mature working package
  7. Never mind open source or commercial
  
  Do you know about something like this ?
  
  Thanks.
  Mishka.
  
  
 
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test via telnet (ignore)

2005-09-05 Thread erez0001

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Shell programing question

2005-09-05 Thread Shachar Shemesh
Hi all,


I have a shell programing question. I want to write a test that runs a
certain background program if it doesn't already exist. What I want to
test is this:

If the pid file doesn't exist

or

The pid file relates to a non-existing process

or

The process is not what I'm trying to run

then

run the program.


The two conditions are fairly simple to code in bash:

if [ ! -f /var/run/pid -o ! -d /proc/`cat /var/run/pid` ]

then

/usr/bin/program

fi


The third one I'm having some difficulties with. It's fairly easy to
find out whether it's the right program or not. Something along the
lines of:

(readlink /proc/`cat /var/run/pid`/exe | grep -q progname)

will return 0 if it's the right program and 1 if it's not. In fact,
that's exactly my problem. I want the 0 and 1 to be reversed. If I did:

if [ ! -f /var/run/pid -o ! -d /proc/`cat /var/run/pid` ] || (readlink
/proc/`cat /var/run/pid`/exe | grep -q progname)

then

...


Then the program would get run if the pid file is gone, and it will get
run if the pid file is there but there is no such process, but if there
is such a process (but it's not the right one) it will not get run, and
if there is such a process and it is the right one, the process will be
run again!


Any ideas on how to correctly code this piece of code would be greatly
appreciated.

  Shachar

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Re: Quest for *nix C/C++ IDE

2005-09-05 Thread Geoffrey S. Mendelson
On Mon, Sep 05, 2005 at 11:44:11AM +0300, Gilboa Davara wrote:
 On Sun, 2005-09-04 at 09:45 -0700, Nzer Zaidenberg wrote:
  Real developers (like me) use gvim and Makefiles like
  God intended us to work.
 
 Amen to that!
 vim + ctags. period.
 We don't use-no-stinking-mouse around here! No sirrie!

And debug with ifdef DEBUG and print(f) statments.

Geoff.

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Re: Quest for *nix C/C++ IDE

2005-09-05 Thread Gilboa Davara
On Mon, 2005-09-05 at 12:29 +0300, Geoffrey S. Mendelson wrote:
 On Mon, Sep 05, 2005 at 11:44:11AM +0300, Gilboa Davara wrote:
  On Sun, 2005-09-04 at 09:45 -0700, Nzer Zaidenberg wrote:
   Real developers (like me) use gvim and Makefiles like
   God intended us to work.
  
  Amen to that!
  vim + ctags. period.
  We don't use-no-stinking-mouse around here! No sirrie!
 
 And debug with ifdef DEBUG and print(f) statments.

Actually, it's debug with printk ;-)

 
 Geoff.



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buy ata (voip)

2005-09-05 Thread erez0001
i want to connect both my analog phone and line to asterisk
i am looking where i can buy a cheap ata that has both FXS and FXO in it
i saw one on the net, was about 80$, but they didn't deliver to israel :-(

anyone ?

erez.

btw: i am sending this mail via telnet to port 25 of my isp
for some reson, 3 mails i sent from google to the list didn't arrive. dunno why


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Re: buy ata (voip)

2005-09-05 Thread Uri Even-Chen


[EMAIL PROTECTED] wrote:

btw: i am sending this mail via telnet to port 25 of my isp
for some reson, 3 mails i sent from google to the list didn't arrive. dunno why


A few comments:

1. I think it's always better to use a mail client software for sending
E-mail, and not send directly via telnet to port 25.  There are many
good mail client programs out there.

2. If you insist in using telnet, at least add the recipient as To
header and your own address as From header.  Otherwise it looks like
just another spam.

Best Regards,

Uri Even-Chen
Speedy Net
Raanana, Israel.

E-mail: [EMAIL PROTECTED]
Phone: +972-9-7715013
Website: www.uri.co.il



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Re: Quest for *nix C/C++ IDE

2005-09-05 Thread Muli Ben-Yehuda
On Mon, Sep 05, 2005 at 12:29:14PM +0300, Geoffrey S. Mendelson wrote:
 On Mon, Sep 05, 2005 at 11:44:11AM +0300, Gilboa Davara wrote:
  On Sun, 2005-09-04 at 09:45 -0700, Nzer Zaidenberg wrote:
   Real developers (like me) use gvim and Makefiles like
   God intended us to work.
  
  Amen to that!
  vim + ctags. period.
  We don't use-no-stinking-mouse around here! No sirrie!
 
 And debug with ifdef DEBUG and print(f) statments.

Debug with your brain, use #ifdef DEBUG, printf() or your favorite
debugger to supply it with pertinent data.

Silly thread.

Cheers,
Muli
-- 
Muli Ben-Yehuda
http://www.mulix.org | http://mulix.livejournal.com/


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Re: Shell programing question

2005-09-05 Thread Alex Shnitman
 (readlink /proc/`cat /var/run/pid`/exe | grep -q
 progname)
 
 will return 0 if it's the right program and 1 if
 it's not. In fact,
 that's exactly my problem. I want the 0 and 1 to
 be reversed. If I did:

You can add -v to the grep command line, it will
reverse its function. Or replace grep -q progname
with (grep -q progname  exit 1; exit 0).

--Alex





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Re: Shell programing question

2005-09-05 Thread Shachar Shemesh
Alex Shnitman wrote:

You can add -v to the grep command line, it will
reverse its function.

It may help this particular case, but -v reverses the search criteria,
not the overall result.

Take a file that has the two lines:
1
2

Doing grep 1 file will result in 0 (found), while doing grep -v 1
file will also result in 0, as there is a line in the file that does
not contain 1. In any case, the same situation may apply to other
cases as well.

 Or replace grep -q progname
with (grep -q progname  exit 1; exit 0).
  

That will work, but I was really hoping to avoid such a convulted case.
If I wanted to do that, I could also do:
if ...
then
(readlink .. | grep -q progname) || runcommand
fi

  Shachar

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Setting up a private network behind a firewall.

2005-09-05 Thread Gilboa Davara
Hello all,

I looking to create a permanent connection between my home network and
the private network I have at work.
The setup is as follows:
Home - Firewall Cable - Internet - ADSL - Win2K -
Workstation - Work.

I'm currently using the SSH port forwarding to gain access to my private
network from work; However, this solution doesn't give me access to my
work network from home.
I have no control over the Windows 2K gateway/NAT, and if I bother the
admins they might revoke my DSL privileges. 
In short, I cannot ask him to forward specific ports to my machine.
More-ever, both IPs ([EMAIL PROTECTED], [EMAIL PROTECTED] are dynamic, though 
my private
network is resolved using freedns.afraid.org)

As far as I could see, OpenVPN might solve my problem; but AFAICS it
requires both ends to have static IP and/or resolvable hosts.

To reiterate:
I need a solution in which, my workstation at work, will establish a
secure (semi)-persistent connection between my home firewall creating
virtual network between the two, giving me access to my work network
from home.

Thanks in advance,
Gilboa
P.S. I should add, the I have a separate network at work, with no direct
link to my workplace's LAN; plus, both networks sit behind a fairly
strict iptables firewall.


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Introduction to Xen

2005-09-05 Thread rosenrami
Hi,

The Xen Project is gaining a lot of interest lately.
I am following it for more than a year now.

The Linux Journal had published yesterday an article I wrote, titled
 Introduction to the Xen Virtual Machine.

If anyone is interested in reading it, he can find it in:  
 http://www.linuxjournal.com/article/8540

 Regards,
 Rami Rosen
 

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Re: sys / db performance block size

2005-09-05 Thread Amos Shapira
On 9/5/05, Michael Ben-Nes [EMAIL PROTECTED] wrote:
 Im setting up a Postgresql sql server on IBM x345, dual xeon, raid1 ( 2
 disks ), raid10 ( 4 disks  ).
 
 The db data will be  stored on the RAID10 and will consist mostly of
 product table of 5 mil rows and keywords table with 60 mil rows.
..
 I initialized the partion with reiserfs filesystem with block size of
 8192, but couldnt mount it. it kept saying:
 
 wrong fs type, bad option, bad superblock on /dev/VolGroup01/LV-1-0, or
 too many mounted file systems

Troubleshooting your problem:
1. check dmesg.
2. Have you provided the filesystem type to mount or did you relay
on auto-detection?
3. reiserfsck?

As for using ReiserFS for a database - I'm pretty sure that I read that
ReiserFS is considered excellent for many small files but other
filesystems are better with large files. You might want to check around
for reocmmandations about PostgresQL tuning (or Linux databases in
general). www.postgresql.org is an excellent site. Here is one page
there which talks about choice of filesystems: http://tinyurl.com/c4xes
and here is another one about taking advantage of multiple disk spindles:
http://tinyurl.com/8qjlg

Also I think I read conflicting views about the sensibility of using a
transactional database like PostgresQL on top of a journaling filesystem,
I don't remember all the arguments but it might be that the journaling
at both levels might defeat the database's disk-access atomicity.

(And before I'll be suspected of bias - I use ReiserFS for my home machine
a few years now and thank god for it - it saved me a few times when the
power in my apparetment was flaky, not to mention that it generally feels
very fast).

I'd be interested to know what you came up with eventually (as I suspect
many people on this forum).

Cheers,

--Amos

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Re: Shell programing question

2005-09-05 Thread Nadav Har'El
On Mon, Sep 05, 2005, Shachar Shemesh wrote about Shell programing question:
 will return 0 if it's the right program and 1 if it's not. In fact,
 that's exactly my problem. I want the 0 and 1 to be reversed. If I did:

Is that your only program - reversing the return code? This is easy, just
use the ! operator!

For example:

$ true; echo $?
0
! true; echo $?
1

Yes, the ! operator works not just in an if statement.

 Then the program would get run if the pid file is gone, and it will get
 run if the pid file is there but there is no such process, but if there
 is such a process (but it's not the right one) it will not get run, and
 if there is such a process and it is the right one, the process will be
 run again!

I'm not sure what you're saying here. If your if statement doesn't do the
correct logic, try to fix its logic. Sometimes you might want to do a
couple of ifs, nested, to simlify the logic.

-- 
Nadav Har'El|  Monday, Sep 5 2005, 1 Elul 5765
[EMAIL PROTECTED] |-
Phone +972-523-790466, ICQ 13349191 |If I were two-faced, would I be wearing
http://nadav.harel.org.il   |this one? Abraham Lincoln

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Re: Shell programing question

2005-09-05 Thread Amos Shapira
On 9/5/05, Shachar Shemesh [EMAIL PROTECTED] wrote:
 Alex Shnitman wrote:
 
 You can add -v to the grep command line, it will
 reverse its function.
 
 It may help this particular case, but -v reverses the search criteria,
 not the overall result.
 
 Take a file that has the two lines:
 1
 2
 
 Doing grep 1 file will result in 0 (found), while doing grep -v 1
 file will also result in 0, as there is a line in the file that does
 not contain 1. In any case, the same situation may apply to other
 cases as well.

But by definition the input contains only one line - so either it
matches or not.

BTW - I'd suggest using egrep and a very strict regular expression to
avoid false positives.

Cheers,

--Amos

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RE: sys / db performance block size

2005-09-05 Thread Tzahi Fadida
First, its better to ask the experts on this matters at
pgsql-general@postgresql.org

It is not definitive that for postgresql you'd better set
8kb block size since the OS already coalleses the files close
together anyway and there is no guarentee the page will be aligned
to the hardware block size (which can be very different) so I would
be carefull with that assumption.
Regarding the FS, I think you'd better use JFS or XFS for better
performance with DB files such as postgresql. 
You cannot just change the postgresql page size (BLCKSZ constant)
since (1) its hardwired and you have to recompile and (2) its used
all over the code and assumed to be 8192 so I'd be carefull with
changing this.
If I had to bet on the best performance from what I have been reading
the last year on the mailing lists I would go with JFS but also try XFS
to see. I would suggest to use the lastest version of the kernel so
these FS will be the most stable.
This is not the whole story though, you have in the postgresql
configuration files ways to
allocate memory for sorts, merges, etc... that can be flushed to disk
just as with your OS swap files. It also depends on your load. I would
suggest you will give speacial attention to that alone
and also read the DB optimization section in the manual.
Postgresql ver 8 (now 8.1 beta is out) should be better at cleaning up
after you.
Also remember to vacuum periodically otherwise you disk would be
clogged. 
AND ALSO, do periodical vacuum analyze to get the queries to adapt to
statistical
changes in your relations for best performance. If you have a lot of
entries, think about
letting go of indices or droping them and rebuilding them after the
inserts, etc...

DB performance is often more improved by improving your queries and not
the block size
of your FS.



Regards,
tzahi.

 -Original Message-
 From: [EMAIL PROTECTED] 
 [mailto:[EMAIL PROTECTED] On Behalf Of Michael Ben-Nes
 Sent: Monday, September 05, 2005 10:00 AM
 To: linux-il@linux.org.il
 Subject: sys / db performance  block size
 
 
 Hi
 
 
 Im setting up a Postgresql sql server on IBM x345, dual xeon, 
 raid1 ( 2 disks ), raid10 ( 4 disks  ).
 
 The db data will be  stored on the RAID10 and will consist 
 mostly of product table of 5 mil rows and keywords table with 
 60 mil rows.
 
 
 Postgres default block size is 8192.
 
 Reading over the net I understood that for the best 
 performance the filesystem block size should be the same ( 8192 ).
 
 
 I initialized the partion with reiserfs filesystem with block 
 size of 8192, but couldnt mount it. it kept saying:
 
 wrong fs type, bad option, bad superblock on 
 /dev/VolGroup01/LV-1-0, or too many mounted file systems
 
 Tried it with LVM  without.
 
 Any Ideas ?
 
 
 I also interested in the list opinion about what should be 
 the DB block size, FS block size, LVM PE Size  RAID Strip Size.
 
 
 Cheers
 
 -- 
 --
 Canaan Surfing Ltd.
 Internet Service Providers
 Ben-Nes Michael - Manager
 Tel: 972-4-6991122
 Cel: 972-52-8555757
 Fax: 972-4-6990098
 http://www.canaan.net.il
 --
 
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RE: Quest for *nix C/C++ IDE

2005-09-05 Thread Tzahi Fadida
I use cscope instead of the regular ctags in gvim.

Regards,
tzahi.

 -Original Message-
 From: [EMAIL PROTECTED] 
 [mailto:[EMAIL PROTECTED] On Behalf Of Gilboa Davara
 Sent: Monday, September 05, 2005 10:44 AM
 To: IL List
 Subject: Re: Quest for *nix C/C++ IDE
 
 
 On Sun, 2005-09-04 at 09:45 -0700, Nzer Zaidenberg wrote:
  Real developers (like me) use gvim and Makefiles like
  God intended us to work.
 
 Amen to that!
 vim + ctags. period.
 We don't use-no-stinking-mouse around here! No sirrie!
 
 
  
  lesser beings...
  
  use slickedit or kdevelop.
  slickedit cost money but rumers says its worth it.
  
  personally i use vi and terminal and debug with dbx
  natively :-) but i guess this is not what sane people
  would use.
  
  
  Emacs is also a good choice but was made for people
  with 6 fingers in every hand (one is always required
  for the META key :-).
  
  --- Michael Sternberg [EMAIL PROTECTED] wrote:
  
   Hello
   
   We're looking for recomendations on *nix IDE.
   
   Following virtues are seeked:
   1. Multiplatform. We will develop on Linux and
   SunOS. Maybe AIX and HP in
   the future.
   2. Truly integrated. That is, good editor, source
   browser and visual 
   debugger in one bottle. Never mind that it will use
   external utilities 
   like ctags/make/CC/dbx/gcc/gdb/gprof underneath.
   Even better if it will be 
   able to use multiple external compilers or
   debuggers.
   3. Good multithreading support is a MUST.
   4. Reasonably light, does not demand very much
   resources.
   5. Does not demand installing additional heavy
   packages (like KDE for 
   KDevelop)
   6. Not beta version or something - we're looking
   mature working package
   7. Never mind open source or commercial
   
   Do you know about something like this ?
   
   Thanks.
   Mishka.
   
   
  
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Re: Setting up a private network behind a firewall.

2005-09-05 Thread Alex Shnitman
 I looking to create a permanent connection between
 my home network and
 the private network I have at work.
 The setup is as follows:
 Home - Firewall Cable - Internet - ADSL -
 Win2K -
 Workstation - Work.

Faced with almost exactly the same situation a couple
of years ago, I used vtun (http://vtun.sf.net/). The
home machine was the server and the work machine was
the client. The client was configured to retry
creating the connection once a minute to a dynamic DNS
address, so if any one of the two machines (home/work)
is rebooted, the connection is soon restored.

It works by sending IP over UDP, so it traverses a NAT
firewall that doesn't regulate egress connections. It
creates a virtual subnet (e.g. 192.168.0.1 and
192.168.0.2) between the two machines, so as long as
it is up, you can ssh from any machine to the other
one.

The most convoluted demo of this technology was
showing a VNC client running on my work machine,
connected to a server on the Windows that was running
in VMWare on my home Linux computer. :-)

--Alex


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Re: Setting up a private network behind a firewall.

2005-09-05 Thread Geoffrey S. Mendelson
On Mon, Sep 05, 2005 at 02:06:23PM +0300, Gilboa Davara wrote:

 I looking to create a permanent connection between my home network and
 the private network I have at work.
 The setup is as follows:
 Home - Firewall Cable - Internet - ADSL - Win2K -
 Workstation - Work.

If you can ssh to home then you can ppp to it. You don't really need
an official VPN, just a way of transparently getting packets from one
side to the other and back again.

Lets assume that you have the following IP address ranges:

home 1.2.3.xxx work 4.5.6.xxx

You set up a ppp connection from work over ssh (use dsa or rsa keys, not
passwords*) to a machine on the home network, lets say it's ip is 1.2.3.4.
The ppp side of the machine would be another interface 1.2.3.5.
(make sure you turn OFF peerdns)

On the work side, do the same, e.g. 4.5.6.7 would add 4.5.6.8.

Then you add the routes,

(don't assume the syntax is correct)

at home:
route add -net 4.5.6.0 netmask 255.255.255.0 -gw 1.2.3.5 metric 1

at work:

route add -net 1.2.3.0 netmask 255.255.255.0 -gw 4.5.6.8  metric 1

set up your firewall rules to allow access and packet forwarding on those
ports you wish. 

After a zillion (and unfortunately one sucessfull) attempts to hack my system
using ssh and passwords, I turned off the ability to log on with ssh. Now
only dsa keys are accepted. I carry my DSA key on a USB key fob.

This is not always a good idea, the security of both networks is now
reduced to the lesser of the two. 


Geoff.

-- 
Geoffrey S. Mendelson, Jerusalem, Israel [EMAIL PROTECTED]  N3OWJ/4X1GM
IL Voice: (077)-424-1667  IL Fax: 972-2-648-1443 U.S. Voice: 1-215-821-1838 
Support the growing boycott of Google by radio users and hobbyists.
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Re: Setting up a private network behind a firewall.

2005-09-05 Thread Yedidyah Bar-David
On Mon, Sep 05, 2005 at 02:06:23PM +0300, Gilboa Davara wrote:
 Hello all,
 
 I looking to create a permanent connection between my home network and
 the private network I have at work.
 The setup is as follows:
 Home - Firewall Cable - Internet - ADSL - Win2K -
 Workstation - Work.
 
 I'm currently using the SSH port forwarding to gain access to my private
 network from work; However, this solution doesn't give me access to my
 work network from home.
 I have no control over the Windows 2K gateway/NAT, and if I bother the
 admins they might revoke my DSL privileges. 
 In short, I cannot ask him to forward specific ports to my machine.
 More-ever, both IPs ([EMAIL PROTECTED], [EMAIL PROTECTED] are dynamic, though 
 my private
 network is resolved using freedns.afraid.org)
 
 As far as I could see, OpenVPN might solve my problem; but AFAICS it
 requires both ends to have static IP and/or resolvable hosts.
 
 To reiterate:
 I need a solution in which, my workstation at work, will establish a
 secure (semi)-persistent connection between my home firewall creating
 virtual network between the two, giving me access to my work network
 from home.

You might try pppd over an ssh connection. There is a howto about this
as well as a debian package secvpn doing this. Never tried it myself.
-- 
Didi


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Re: Setting up a private network behind a firewall.

2005-09-05 Thread Gilboa Davara
On Mon, 2005-09-05 at 14:59 +0300, Tzafrir Cohen wrote:
 On Mon, Sep 05, 2005 at 02:06:23PM +0300, Gilboa Davara wrote:
  Hello all,
  
  I looking to create a permanent connection between my home network and
  the private network I have at work.
  The setup is as follows:
  Home - Firewall Cable - Internet - ADSL - Win2K -
  Workstation - Work.
  
  I'm currently using the SSH port forwarding to gain access to my private
  network from work; However, this solution doesn't give me access to my
  work network from home.
  I have no control over the Windows 2K gateway/NAT, and if I bother the
  admins they might revoke my DSL privileges. 
  In short, I cannot ask him to forward specific ports to my machine.
  More-ever, both IPs ([EMAIL PROTECTED], [EMAIL PROTECTED] are dynamic, 
  though my private
  network is resolved using freedns.afraid.org)
  
  As far as I could see, OpenVPN might solve my problem; but AFAICS it
  requires both ends to have static IP and/or resolvable hosts.
 
 It requires one of the ends to have a resolvable address (IP or name)
 that is accessible from the outside. The other side will initiate the 
 connection there.
 
 So you can give your home computer a dynamic IP address and have the
 other network connect there.

This is the general idea.
Have the work machine (re)connect to my firewall and establish a VPN to
the my private network.

Gilboa


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Re: Setting up a private network behind a firewall.

2005-09-05 Thread Tzafrir Cohen
On Mon, Sep 05, 2005 at 02:06:23PM +0300, Gilboa Davara wrote:
 Hello all,
 
 I looking to create a permanent connection between my home network and
 the private network I have at work.
 The setup is as follows:
 Home - Firewall Cable - Internet - ADSL - Win2K -
 Workstation - Work.
 
 I'm currently using the SSH port forwarding to gain access to my private
 network from work; However, this solution doesn't give me access to my
 work network from home.
 I have no control over the Windows 2K gateway/NAT, and if I bother the
 admins they might revoke my DSL privileges. 
 In short, I cannot ask him to forward specific ports to my machine.
 More-ever, both IPs ([EMAIL PROTECTED], [EMAIL PROTECTED] are dynamic, though 
 my private
 network is resolved using freedns.afraid.org)
 
 As far as I could see, OpenVPN might solve my problem; but AFAICS it
 requires both ends to have static IP and/or resolvable hosts.

It requires one of the ends to have a resolvable address (IP or name)
that is accessible from the outside. The other side will initiate the 
connection there.

So you can give your home computer a dynamic IP address and have the
other network connect there.

-- 
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Re: Setting up a private network behind a firewall.

2005-09-05 Thread Gilboa Davara
Thanks.
Vtun works great.
The only thing that concerns me is the password issue (that sits inside
the /etc/vtund.conf)
I assume that the password is being exchange encrypted, right?
Beside creating the vtun connection over SSH, is there any other way to
secure vtun?

Gilboa

On Mon, 2005-09-05 at 04:52 -0700, Alex Shnitman wrote:
  I looking to create a permanent connection between
  my home network and
  the private network I have at work.
  The setup is as follows:
  Home - Firewall Cable - Internet - ADSL -
  Win2K -
  Workstation - Work.
 
 Faced with almost exactly the same situation a couple
 of years ago, I used vtun (http://vtun.sf.net/). The
 home machine was the server and the work machine was
 the client. The client was configured to retry
 creating the connection once a minute to a dynamic DNS
 address, so if any one of the two machines (home/work)
 is rebooted, the connection is soon restored.
 
 It works by sending IP over UDP, so it traverses a NAT
 firewall that doesn't regulate egress connections. It
 creates a virtual subnet (e.g. 192.168.0.1 and
 192.168.0.2) between the two machines, so as long as
 it is up, you can ssh from any machine to the other
 one.
 
 The most convoluted demo of this technology was
 showing a VNC client running on my work machine,
 connected to a server on the Windows that was running
 in VMWare on my home Linux computer. :-)
 
 --Alex
 
 
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devfs - gone

2005-09-05 Thread Shachar Shemesh
Hi all,


The new kernel (2.6.13) has removed support for devfs. While I certainly
understand why devfs is not on by default, it seems that removing it
altogether is a bit harsh.


Devfs has been a great way to quickly (say - inside an initrd) get a
clear picture of what hardware is available, as well as get the relevant
devices required to run said hardware. With devfs gone, installers, some
embedded configurations, and possibly others, may find their time much
harder.


My main question is - does anyone know of a good alternative?


  Shachar


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Re: Setting up a private network behind a firewall.

2005-09-05 Thread Alex Shnitman
 Vtun works great.

Glad to hear that.

 The only thing that concerns me is the password
 issue (that sits inside
 the /etc/vtund.conf)
 I assume that the password is being exchange
 encrypted, right?
 Beside creating the vtun connection over SSH, is
 there any other way to
 secure vtun?

Hey, it's right there in the FAQ, dude:

 1.19 How secure is VTun ?
 Well. VTun doesn't try to be the MOST secure
tunneling software in the
 world, it tries to be fast, stable, rich of features,
easy to use
 and secure enough instead.
 VTun uses Challenge Based Authentication and doesn't
transfer passwords
 in clear text. Encryption module uses MD5 for 128
bits key generation
 and BlowFish algorithm for actual data encryption.
 There could be some weaknesses in key generation
method, we will try
 to address them in future releases. 

--Alex





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Re: devfs - gone

2005-09-05 Thread Nadav Har'El
On Mon, Sep 05, 2005, Shachar Shemesh wrote about devfs - gone:
 Devfs has been a great way to quickly (say - inside an initrd) get a
..
 My main question is - does anyone know of a good alternative?

I believe what you're looking for is udev, isn't it?
Check out
http://www.kernel.org/pub/linux/utils/kernel/hotplug/udev-FAQ

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Re: devfs - gone

2005-09-05 Thread Yedidyah Bar-David
On Mon, Sep 05, 2005 at 04:24:34PM +0300, Shachar Shemesh wrote:
 Hi all,
 
 
 The new kernel (2.6.13) has removed support for devfs. While I certainly
 understand why devfs is not on by default, it seems that removing it
 altogether is a bit harsh.
 
 
 Devfs has been a great way to quickly (say - inside an initrd) get a
 clear picture of what hardware is available, as well as get the relevant
 devices required to run said hardware. With devfs gone, installers, some
 embedded configurations, and possibly others, may find their time much
 harder.

This was discussed quite thoroughly on lkml and summarized on one of the
last kerneltraffic issues (which are very recommended BTW), here
http://www.kernel-traffic.org/kernel-traffic/kt20050827_318.html

 
 
 My main question is - does anyone know of a good alternative?

The recommended alternative is udev. I used it quite successfully,
although I know that it's still not a complete replacement.
-- 
Didi


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Re: Setting up a private network behind a firewall.

2005-09-05 Thread Shachar Shemesh
Gilboa Davara wrote:

Thanks.
Vtun works great.
The only thing that concerns me is the password issue (that sits inside
the /etc/vtund.conf)
I assume that the password is being exchange encrypted, right?
Beside creating the vtun connection over SSH, is there any other way to
secure vtun?

Gilboa
  

Personally, I use OpenVPN. It's the same basic principle as vtun (I
think, I have never actually used vtun), uses public keys for the actual
authentication, is encrypted, and even has HTTP tunneling mode.

  Shachar


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Re: Quest for *nix C/C++ IDE

2005-09-05 Thread Peter



On Mon, 5 Sep 2005, Gilboa Davara wrote:


On Sun, 2005-09-04 at 09:45 -0700, Nzer Zaidenberg wrote:

Real developers (like me) use gvim and Makefiles like
God intended us to work.


Amen to that!
vim + ctags. period.
We don't use-no-stinking-mouse around here! No sirrie!


Actually you can use a mouse with vim (and vim is competing with emacs 
wrt extensions and scripts). It even has a functional gui.


vi(m) is good because if you have to edit something over a bad or slow 
serial link, there is no replacement for it. And nothing beats using 
ctags+vim and then :make make args here and land directly in the error 
list of the compiler output, with ctags providing the support for 
jumping around. This works for anything written in C (and anything that 
vim's regular expressions can be scripted for - such as assembly for 
embedded).


Peter


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Re: Quest for *nix C/C++ IDE

2005-09-05 Thread Leonid Podolny
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1

I was very happy with cscope until I started working with kernel. For
some reason, it was totally impossible to work with -- missing whole
directory trees, function definitions, etc. I also tried eclipse, but
the only thing that was able to reliably browse the kernel source was
slickedit.

Tzahi Fadida wrote:
 I use cscope instead of the regular ctags in gvim.
 

- --




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OT: how do i get an ulta-small PC?

2005-09-05 Thread guy keren

hi,

the background to my question, is that i find myself going to various
places to give lectures, and i need to be able to run a linux environment
with a given configuration. too often i have to rely on other people
bringing their laptops (and i personally hate laptops).

then i thought that there should be no problem putting an entire PC in a
very very small box (by small i mean something like a 1-2 cigarette packs
in size, and a few hundread grams in weight). i don't need it to have an
internal batery, but it should be easy to attach a power supply. it does
not need too much cooling, since it'll be turned on for a few hours at a
time, and be off most of the time.

it does need to have a connector for a PS/2 keyboard, a PS/2 mouse, and
2-4 USB entries (one for a disk-on-key, 2 for USB mouse/keyboard) and a
monitor output. having a sound-card + earphones outlet would be nice too.

i started scanning the web, and i saw small things that were yet too
large, or small PDAs that seem to be too limited (e.g. i want this system
to have a laptop-size hard-disk, so i can install a real system on it).

does anyone know if there are such things for sale, either in israel or
via the internet? i imagine such a thing might cost several hundreads of
dollars, and i'd rather buy something pre-built, then build my own - since
it should be able to sustain movement shocks (after all, i'll be taking it
in a car and drive with it all around, so i don't want to have loose wires
due to a bump on the road, etc).

thanks,
-- 
guy

For world domination - press 1,
 or dial 0, and please hold, for the creator. -- nob o. dy

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Re: OT: how do i get an ulta-small PC?

2005-09-05 Thread Tzafrir Cohen
On Tue, Sep 06, 2005 at 12:13:34AM +0300, guy keren wrote:
 
 hi,
 
 the background to my question, is that i find myself going to various
 places to give lectures, and i need to be able to run a linux environment
 with a given configuration. too often i have to rely on other people
 bringing their laptops (and i personally hate laptops).
 
 then i thought that there should be no problem putting an entire PC in a
 very very small box (by small i mean something like a 1-2 cigarette packs
 in size, and a few hundread grams in weight). i don't need it to have an
 internal batery, but it should be easy to attach a power supply. it does
 not need too much cooling, since it'll be turned on for a few hours at a
 time, and be off most of the time.
 
 it does need to have a connector for a PS/2 keyboard, a PS/2 mouse, and
 2-4 USB entries (one for a disk-on-key, 2 for USB mouse/keyboard) and a
 monitor output. having a sound-card + earphones outlet would be nice too.

This is basically a laptop. Why not a disk-on-key? Actually it would
probably be a bit too small and limited. But you can get a case for a
2.5 HD with a USB connector. Fits in your pocket and can store some
40GB.

Enough for several partiions for several OSes. And maybe even several
versions of qemu.

A laptop is basically limited by the size of a decent screen and a
decent keyboard.

-- 
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http://tzafrir.org.il |   | a Mutt's  
[EMAIL PROTECTED] |   |  best
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Re: OT: how do i get an ulta-small PC?

2005-09-05 Thread Marc A. Volovic
I significantly disagree with Tsafrir.

What you want and can use is a vortex86 machine/box.

They are very small, have a very light power footprint, easy to add bits
and pieces to, are a full i386 machine. They ARE very underpowered ;-).

Have a look at the board that fits your every requirement except for
audio (and that can be added quite easily).

http://www.icop.com.tw/products_detail.asp?ProductID=119

If you decide to go that way - I am sure we can assemble a few good
people to buy a few of these and play ball ;-). I would like one or two,
for purposes VERY similar to yours.

The one minus is that all the ready-made units bring all the available
I/O to the outside, increasing the form-factor significantly. So - if
you want a small project - here you have the brick to tie it to ;-).

M

On Tue, 2005-09-06 at 00:13 +0300, guy keren wrote:
 then i thought that there should be no problem putting an entire PC in a
 very very small box (by small i mean something like a 1-2 cigarette packs
 in size, and a few hundread grams in weight). i don't need it to have an

 it does need to have a connector for a PS/2 keyboard, a PS/2 mouse, and
 2-4 USB entries (one for a disk-on-key, 2 for USB mouse/keyboard) and a
 monitor output. having a sound-card + earphones outlet would be nice too.

 does anyone know if there are such things for sale, either in israel or
 via the internet? i imagine such a thing might cost several hundreads of
 dollars, and i'd rather buy something pre-built, then build my own - since
 it should be able to sustain movement shocks (after all, i'll be taking it
 in a car and drive with it all around, so i don't want to have loose wires
 due to a bump on the road, etc).


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Re: OT: how do i get an ulta-small PC?

2005-09-05 Thread Geoffrey S. Mendelson
On Tue, Sep 06, 2005 at 12:13:34AM +0300, guy keren wrote:

 the background to my question, is that i find myself going to various
 places to give lectures, and i need to be able to run a linux environment
 with a given configuration. too often i have to rely on other people
 bringing their laptops (and i personally hate laptops).

Are you X86 centric? You can get a Macintosh mini from Yeda for about
$700+VAT. It has a 1.4gHz PPC processor, 256m of RAM (may be up to 512 now)
and an 80 gig hard drive, 2 USB 2 ports, firewire, ethernet and a DVI
video port that comes with a VGA adaptor.

A 1.2gHz version with a 40gig drive is about $100 less. It comes with
an open source BSD UNIX operating system with a closed source GUI, and
can also run YellowDog or FC4 Linux.

It is not designed to run on batteries, but AFIK it has a standard 
power connector and only takes one DC voltage and people do it.

All you need to use it is an outlet, VGA monitor and USB keyboard and mouse,

Geoff.
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Re: Quest for *nix C/C++ IDE

2005-09-05 Thread Dov Grobgeld
On Mon, Sep 05, 2005 at 02:05:49AM +0300, guy keren wrote:
 [stuff deleted]

 p.s. you will _realy_ want to make sure you're using Makefiles, and not
 some proprietary project file format, in order to build your software, and
 so you'll want to make sure that any IDE you choose does not lock you in -
 it could get quite nasty if you need to port to some platforms that your
 IDE-of-choice does not support.
 
You may want to investigate some of the more advanced make replacements
though. Personally I have switched to using scons (http://www.scons.org/) 
after having used makefile for more than 10 years, and believe me it
that it does feel good. :-)

Dov


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Re: OT: how do i get an ulta-small PC?

2005-09-05 Thread Pablo 'merKur' Kohan
On Tue, 2005-09-06 at 00:13 +0300, guy keren wrote:
 hi,
 
 the background to my question, is that i find myself going to various
 places to give lectures, and i need to be able to run a linux environment
 with a given configuration. too often i have to rely on other people
 bringing their laptops (and i personally hate laptops).
Hi Guy !

Other stuff you can check:
- The Crusoe (RIP) based mini-handtop (A5 size) Dialogue's flybook.
  Note it's available in Israel ( http://www.etkes.com/ )

If you are not x86 centric, you should consider also:
- If you want to DIY, check LART ( http://www.lart.tudelft.nl/ )

And the PDA family:
- iPAQ (with Linux of course)

Lastly, the pearls
- Sharp Zaurus (specially the Clamshell forms). These are originally for
  the Japanese market, but converted to English by several providers.

- The beautiful Debian-based Nokia 770.

Enjoy !
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Re: devfs - gone

2005-09-05 Thread Amos Shapira
On 9/5/05, Shachar Shemesh [EMAIL PROTECTED] wrote:
 Hi all,
 
 
 The new kernel (2.6.13) has removed support for devfs. While I certainly

Hi Shachar,

Look in one of the latest kernel-traffick issues:

1. Devfs wasn't removed completly, only the option to configure
it. I believe it will be easy for you to find the right flags to enable
it and add them manually.

2. In the same kernel-traffic issue where the disablement was
discussed (again?), the author of udev (I think) provided a 300-line
module to supply very similar functionality to devfs on top of udev.
This patch was mentioned/provided in response to someone talking
about lack of devfs breaking his embedded setups, and that same
someone was happy with the udev-based solution.

I think this is the item:
http://www.kernel-traffic.org/kernel-traffic/kt20050827_318.html#2
it might be worth digging the rest of the kernel-traffic archives
for more info about where it's going.

Cheers,

--Amos

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Re: devfs - gone

2005-09-05 Thread Muli Ben-Yehuda
On Tue, Sep 06, 2005 at 07:43:57AM +1000, Amos Shapira wrote:

 1. Devfs wasn't removed completly, only the option to configure
 it. I believe it will be easy for you to find the right flags to enable
 it and add them manually.

CONFIG_DEVFS, naturally. That would be the wrong thing to do, as devfs
is really going away. It's best to migrate to udev in one of its
variants.

 2. In the same kernel-traffic issue where the disablement was
 discussed (again?),

For the umpteenth time.

 the author of udev (I think)

Yes. Greg KH. 
 provided a 300-line
 module to supply very similar functionality to devfs on top of udev.

ndevfs.

 This patch was mentioned/provided in response to someone talking
 about lack of devfs breaking his embedded setups, and that same
 someone was happy with the udev-based solution.

.. as a proof of concept, that will never be integrated. 

Cheers,
Muli
-- 
Muli Ben-Yehuda
http://www.mulix.org | http://mulix.livejournal.com/


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Re: OT: how do i get an ulta-small PC?

2005-09-05 Thread Peter


http://openbrick.org/

there are others. The smaller you want, the less likely it will be to 
have a x86 cpu and the more likely it will be a mips or other risc unit. 
Then you will have to switch to netbsd to use it ;-)


Peter

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Re: OT: how do i get an ulta-small PC?

2005-09-05 Thread Pablo 'merKur' Kohan
On Tue, 2005-09-06 at 04:17 +0300, guy keren wrote:
  - The beautiful Debian-based Nokia 770.
 
 did i mention that i don't need a cellphone? apparently i forgot ;)
Hmmm...
Is IBM doing stuff other than Mainframes ? ... And Apple other than
Aquariums ? ;)

Actually, the *one* function missing in the 770 is a cellphone...
Still, I guess it will be too PDAish for you...

My $0.02 anyway,
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Re: OT: how do i get an ulta-small PC?

2005-09-05 Thread guy keren

On Mon, 5 Sep 2005, Geoffrey S. Mendelson wrote:

 On Tue, Sep 06, 2005 at 12:13:34AM +0300, guy keren wrote:

  the background to my question, is that i find myself going to various
  places to give lectures, and i need to be able to run a linux environment
  with a given configuration. too often i have to rely on other people
  bringing their laptops (and i personally hate laptops).

 Are you X86 centric? You can get a Macintosh mini from Yeda for about
 $700+VAT. It has a 1.4gHz PPC processor, 256m of RAM (may be up to 512 now)
 and an 80 gig hard drive, 2 USB 2 ports, firewire, ethernet and a DVI
 video port that comes with a VGA adaptor.

and it weighs 2.9 pounds (6.4 kg) - much too heavy. it also has no PS/2
entries - i normally get to places where there are PCs, sometimes old PCs,
and i can nick a local mouse+keyboard, so i can't rely on local USB
devices.

it does, however, remind me that i'll need an ethernet controller (this
also solves the issue of installation - it can be done as a networked
installation - ofcourse, i'll still need to be able to have an initial
boot, and for that i guess i could connect an external floppy or CD drive,
that won't be needed during travels).

-- 
guy

For world domination - press 1,
 or dial 0, and please hold, for the creator. -- nob o. dy

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Re: OT: how do i get an ulta-small PC?

2005-09-05 Thread Geoffrey S. Mendelson
On Tue, Sep 06, 2005 at 04:17:26AM +0300, guy keren wrote:

 if they had this without the screen and without the keyboard, and with two
 PS/2 outlets - i'd be a happy camper ;)

How about a PC-104 system. It's a single board about 4x6 inches. The
ones I've used have an x86 processor (various speeds and performance), a
graphics chip, sound chip, ethernet. 2 serial, 1 parallel, 2 USB and a
PS/2 keyboard and mouse port. Depending upon the board you get, you can
get LCD support, VGA support, or composite video in varying resolution
and color depth. They usually have one or two IDE interfaces and a
floppy interface.

They also come in ARM, PPC and MIPS processors.

Some have built in memory, some take SODIMMs, etc. 

When I was in the hardware business we built our proof of concept units
in 4x6 inch boxes with a laptop hard drive and an external 5 volt
supply. We also had a screen and keyboard of sorts on them, but
obviously you would not need them. We were building handheld gaming
machines and ran Linux with X windows and WINE on them.

If you get the correct processor, you don't need a fan if you use
a semiconductor hard drive instead of a laptop one. 

Geoff.
-- 
Geoffrey S. Mendelson, Jerusalem, Israel [EMAIL PROTECTED]  N3OWJ/4X1GM
IL Voice: (077)-424-1667  IL Fax: 972-2-648-1443 U.S. Voice: 1-215-821-1838 
Support the growing boycott of Google by radio users and hobbyists.
It's starting to work, Yahoo has surpassed Google.

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Re: OT: how do i get an ulta-small PC?

2005-09-05 Thread Hetz Ben Hamo
Sorry but:

2.9 pounds = 1.31541787 kilograms

Regarding PS/2 entries - I bought from the local Cosmos supermarket a
USB small cable which has 2 PS/2 female connectors (mouse, keyboard).
Cost: 31.90 NIS

 it does, however, remind me that i'll need an ethernet controller (this
 also solves the issue of installation - it can be done as a networked
 installation - ofcourse, i'll still need to be able to have an initial
 boot, and for that i guess i could connect an external floppy or CD drive,
 that won't be needed during travels).

Mac Mini has: Modem connector, network controller, built in CDRW/DVD
drive, and if you buy the new models, a bluetooth (which should be
running nice with Linux's Bluez). At least from what I heard, YDL
Linux is running very nicely on top of it.

Thanks,
Hetz

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Telux: Network Programming by Eddie Aronovich on 21/August

2005-09-05 Thread Shlomi Fish
On 9 September 2005 (this Sunday) the Tel Aviv Linux Club will meet again to 
hear the second part of Eddie Aronovich' presentation about Network 
Programming. The time of day is 18:30 and the place is Schreiber building, 
room 007 of Tel Aviv University.

More information can be found at the club's site:

http://www.cs.tau.ac.il/telux/

Hope to see you there!

Regards,

Shlomi Fish

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

Tcl is LISP on drugs. Using strings instead of S-expressions for closures
is Evil with one of those gigantic E's you can find at the beginning of 
paragraphs.

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Re: Telux: Network Programming by Eddie Aronovich on 21/August

2005-09-05 Thread Shlomi Fish
On Tuesday 06 September 2005 05:27, Shlomi Fish wrote:
 On 9 September 2005 (this Sunday) the Tel Aviv Linux Club 

I'm afraid that the correct date is 11 September 2005. (still Sunday)

Sorry for the inconvenience.

Regards,

Shlomi Fish

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

95% of the programmers consider 95% of the code they did not write, in the
bottom 5%.

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