[Fwd: Re: More on bittorrent]
by Aaron Konstam
-------- Forwarded Message --------
From: Aaron Konstam <akonstam(a)sbcglobal.net>
To: For users of Fedora <fedora-list(a)redhat.com>
Subject: Re: More on bittorrent
Date: Mon, 26 Feb 2007 18:35:22 -0600
On Mon, 2007-02-26 at 13:24 -0800, Kam Leo wrote:
> On 2/26/07, Aaron Konstam <akonstam(a)sbcglobal.net> wrote:
> > On Mon, 2007-02-26 at 10:30 -0800, Kam Leo wrote:
> > > On 2/26/07, Aaron Konstam <akonstam(a)sbcglobal.net> wrote:
> > > > >>
> > > > >>Aaron Konstam wrote:
> > > > >> I wanted to download the latest FC6 respin CDs. I went to the web
> > > > >> location and found the correct bittorrent and clicked to download it.
> > > > >> The bittorrent GUI opened and the download started. Now I was
> > > > connected
> > > > >> to a system with an Internet speed of 45 Mb/s but the GUI said the
> > > > >> download would take 15 hours. Well the respin has 5 CDs. I have a
> > > > >> downloaded a single 600+ Meg CD in less than an hour (actually I
> > > > think
> > > > >> it was much less). So I can't understand why the bittorrent download
> > > > >> should take 15 hours.
> > > > >>
> > > > >> I have done this before but it has been a long time ago. I must be
> > > > doing
> > > > >> something wrong but what? Any ideas?
> > > > >
> > > > >A couple of things to check - do you have a download speed limit
> > > > >set, so that it does not use the full bandwidth when downloading? Do
> > > > >you have your firewall properly configured so that you can seed as
> > > > >well as download? If not, this can limit your download speed. How
> > > > >many seeds are there, compared to the number of clients, and how
> > > > >many are you connected to?
> > > > My download speed was set too high. I have no firewall set on my machine
> > > > but the university does however they tell me that they do not restrict
> > > > bittorrents. I don't know how to check the number of seeds and /or
> > > > number of clients.
> > > >
> > > > So there are clearly holes in my knowledge. Can someone help fill in the
> > > > gaps.
> > > > >
> > > > >One other thing to keep in mind is that the time estimate when you
> > > > >first start downloading is usually high, and drops as you connect to
> > > > >more feeds. It also tends to change during the download. Depending
> > > > >on how the client calculates the time remaining, it may get less
> > > > >sensitive to rate changes as the download progresses - more data to
> > > > >average, so temporary fluctuations in download speed do not affect
> > > > >it as much.
> > > > The above is true but I waited 2 hours and not even 1 CD was downloaded.
> > > >
> > >
> > > Bittorrent works when there are a large number of seeders and peers.
> > > The problem with the Fedora respin is that after the initial
> > > availability announcement the number of seeders and peers drops to a
> > > very low number, less than 5 when I tried it. If each shares the
> > > minimum required upload speed, 4K bits/second, the total bandwidth is
> > > only 20K bits/second. Factor the low number of participants and the
> > > problem of finding peers with the fragments missing from your download
> > > and you get the current situation. Also I find that the tracker used
> > > by Fedora respin does not work well with my setup which is behind a
> > > firewall.
> > >
> > So am I conclude that >10 hours may be what it will take. How do you
> > find out how many seeders are active?
> > --
>
> Use Azureus. It shows the number of seeders and peers connected to your swarm.
That is ok if I can figure out how. How do you get azureus to download a
bittorrent at a web site?
--
=======================================================================
The wise and intelligent are coming belatedly to realize that alcohol,
and not the dog, is man's best friend. Rover is taking a beating -- and
he should. -- W.C. Fields
=======================================================================
Aaron Konstam telephone: (210) 656-0355 e-mail: akonstam(a)sbcglobal.net
17 years, 3 months
Is it possible to steal your SSH key?
by Peter Kiem
Hi,
Just wondering something...
If you connect to a compromised server using SSH keys (not passwords) is
it possible for the compromised server to record your SSH key so they
can use it on other servers you log into?
Opinions?
--
Regards,
Peter Kiem
Zordah IT - IT Consultancy and Internet Services
Ph: (0414) 724-766 Fax: (07) 3344-5827
Web: www.zordah.net Email: zordah(a)zordah.net
17 years, 3 months
Authenticate `su -` through PAM and SSH Agent
by Justin Willmert
I'd appreciate it if anybody would tell me if there is a way to use PAM
to authenticate a user when using `su -`. After reading about ssh agent
a while ago, I've had this idea that it'd be a perfect way to add
another layer of security around my server. Currently I use ssh keys to
log in remotely as my user. In my mind, using ssh agent instead of
passwords would be the next logical step.
I'm not very familiar with ssh agent and rsa authentication methods
though. I've got a rough idea of what I'm looking for, but one of you
may be able to direct to me why my plan isn't safe/wouldn't work. This
is what I've been thinking:
I currently have my ssh key for my user allowing me to login to my
server (encrypted with a password of course). I enable ssh agent
forwarding in PuTTY or ssh (depending on whether I'm in Windows or FC6
at the time). I'd then issue a `su -` at the prompt and it'd
authenticate against the ssh agent I have running locally, and if I
didn't have it running, I'd be denied access.
Thanks for any suggestions or help,
Justin W
17 years, 3 months
How much swap?
by Uno Engborg
I am wondering how much swap space I need in modern Linux such as FC6.
I'm planning to set up a system Pentium Dual Core with 8G RAM, and I
don't expect I need much
more than that for my apps.
Would I need a swap anyway. There is some old rule of thumb to have
twice as much virtual
memory as you have physical RAM, but that sounds a bit ridiculous as it
would take a lot
of time to swap in/out this much memory from disk.
In some other Unixes the swap space was needed
to preserve dump information in case of a panic, are there any such
considerations
in Linux?
Regards
Uno Engborg
17 years, 3 months
Re: cd installs under FC6 fail
by Kwan Lowe
>> It sounds like a DOS/UNIX linefeed issue. You can try specifying the shell:
>>
>> sh MathInstaller
>>
>> I believe that there are also mount options that can convert linefeeds
>> automatically
>> so perhaps that could help.
>>
>> --
>> * The Digital Hermit http://www.digitalhermit.com
>> * Unix and Linux Solutions kwan(a)digitalhermit.com
>>
>
> Is your cd mounted with noexec option?
>
Ill wager that's the problem! I'd forgotten about this and it has bitten me before.
--
* The Digital Hermit http://www.digitalhermit.com
* Unix and Linux Solutions kwan(a)digitalhermit.com
17 years, 3 months
Re: Error, but uname -r give different indications
by Alan Cox
On Mon, 26 Feb 2007 23:42:48 +0200
"Peter Lauri" <lists(a)dwsasia.com> wrote:
> Yes now it works, it is starting to update. However, new problem:
>
> warning: /etc/passwd created as /etc/passwd.rpmnew
> warning: /usr/lib/security/classpath.security created as
> /usr/lib/security/classpath.security.rpmnew
> warning: /etc/pam.d/system-auth created as /etc/pam.d/system-auth.rpmnew
>
> What does that actually mean? Could I just copy the passwd to passwd.bak and
> then rename passwd.rpmnew to passwd? And same for the others?
When rpm finds a configuration file has been updated it creates the new
one as .rpmnew rather than stomping on the old one. This is usually the
right thing to do as you don't for example want it to remove all your
users and passwords by replacing them with a new empty password file...
17 years, 3 months
Slightly OT: w2k Time Zone Updating
by taharka
Anyone on the list updating w2k time zones using the $microsoft Time
Zone Editor? If so, has anyone tried using the Time Zone Editor on a
win98SE system with success?
taharka
Lexington, Kentucky U.S.A.
17 years, 3 months
Postfix + ClamAV + SpamAssassin
by Luc MAIGNAN
Hello all,
I'm looking for a HOWTO which explains integration beetween Postfix,
ClamAV and SpamAssassin (Fedora Core 6)
Thanks for any help
BR
17 years, 3 months
Re: cd installs under FC6 fail
by Kwan Lowe
> Message: 11
> Date: Mon, 26 Feb 2007 13:26:41 -0500
> From: Jack Howarth
>
> I am seeing an odd problem under x86_64 FC6. A number
> of different programs that I have tried to install from
> CD have all failed with the error message of the form...
>
> sh: ./MathInstaller: /bin/sh: bad interpreter: Permission denied
>
It sounds like a DOS/UNIX linefeed issue. You can try specifying the shell:
sh MathInstaller
I believe that there are also mount options that can convert linefeeds automatically
so perhaps that could help.
--
* The Digital Hermit http://www.digitalhermit.com
* Unix and Linux Solutions kwan(a)digitalhermit.com
17 years, 3 months
Error, but uname -r give different indications
by Peter Lauri
When I try to update from FC5 to FC6 I get this:
Error: hal conflicts with kernel < 2.6.17
Error: autofs conflicts with kernel < 2.6.17
However, when I do: uname -r I get:
2.6.19-1.2911.fc6
With yum list | grep kernel I get:
kernel.i686 2.6.19-1.2911.fc6 installed
kernel-smp.i686 2.6.15-1.2054_FC5 installed
kernel-smp.i686 2.6.18-1.2239.fc5 installed
kernel.i586 2.6.19-1.2911.fc6 updates
kernel-PAE.i686 2.6.19-1.2911.fc6 updates
kernel-PAE-debug.i686 2.6.19-1.2911.fc6 updates
kernel-PAE-debug-devel.i686 2.6.19-1.2911.fc6 updates
kernel-PAE-devel.i686 2.6.19-1.2911.fc6 updates
kernel-debug.i686 2.6.19-1.2911.fc6 updates
kernel-debug-devel.i686 2.6.19-1.2911.fc6 updates
kernel-devel.i586 2.6.19-1.2911.fc6 updates
kernel-devel.i686 2.6.19-1.2911.fc6 updates
kernel-doc.noarch 2.6.19-1.2911.fc6 updates
kernel-headers.i386 2.6.19-1.2911.fc6 updates
kernel-kdump.i686 2.6.19-1.2911.fc6 updates
kernel-kdump-devel.i686 2.6.19-1.2911.fc6 updates
kernel-xen.i686 2.6.19-1.2911.fc6 updates
kernel-xen-devel.i686 2.6.19-1.2911.fc6 updates
yum-kernel-module.noarch 1.0.3-1.fc6 extras
I am confused, and a newbie.
Best regards,
Peter Lauri
<http://www.dwsasia.com/> www.dwsasia.com - company web site
<http://www.lauri.se/> www.lauri.se - personal web site
<http://www.carbonfree.org.uk/> www.carbonfree.org.uk - become Carbon Free
17 years, 3 months
