Re: [CentOS] update on: Centos email server suddenly much slower. What to do?

2012-09-07 Thread Reinhard Kotucha
On 2012-09-07 at 11:09:09 +0200, M. Fioretti wrote:

  
  On Thu, September 6, 2012 7:14 pm, Marco Fioretti wrote:
   Greetings,
   I run my own email server for some domains I administer, on a
   centos vps server with a very small number of users.
  
   The only services are smtp, imap/pop, webmail
  
   Everything was running without problems until this morning. I
   left home for 1/2 hours, and when I came back everything had
   become about 100x slower (seriously!).
  
  this morning everything is back to normal (for now at least,
  strongly crossing my fingers!), as misteriously as it had frozen
  yesterday. I am able to write from my main email address just
  because of that.
  
  If anything, I am even more puzzled than I was yesterday.
  
  I do have the feeling, after the exchange we had yesterday, that
  the DNS servers my VPS provider told me to use had some problem now
  fixed, but nothing more. Of course, the idea that I don't know for
  sure what happened and it may happen again doesn't make me happy,
  but I honestly wouldn't know what/where to investigate at this
  point. Further comments are welcome.

If it's a DNS server problem, it's helpful to have some IP numbers of
other DNS servers.  It makes sense to look for alternate DNS servers
now, it makes much less fun to look for them when the one you use
doesn't work properly.

Someone mentioned Google's public DNS server.  Is it advisable to use
a DNS server provided by a company which doesn't do anything but
collecting data about its users?  I'm sceptical.

Regards,
  Reinhard

-- 

Reinhard Kotucha  Phone: +49-511-3373112
Marschnerstr. 25
D-30167 Hannover  mailto:reinhard.kotu...@web.de

Microsoft isn't the answer. Microsoft is the question, and the answer is NO.

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Re: [CentOS] Spamassassin under CentOS-6.3

2012-08-31 Thread Reinhard Kotucha
On 2012-08-31 at 17:57:01 +0300, Mihamina Rakotomandimby wrote:

  On 08/31/2012 04:56 PM, Timothy Murphy wrote:

   Also, about 35% of the spam that gets through is in foreign
   languates - Russian, Chinese, Arabic and Turkish -
  
  Those are local langages for some...

Unfortunately you don't say what ... stands for.  If it stands for
users, you are right.

But Timothy's statement is about a program.  And it's a matter of fact
that the languages mentioned above had been neglected by programmers
in the past.  It was a stony way to get to UTF-8, for example, because
too many programmers believed that ISO-8859 is sufficient for everyone.

And Timothy only said what he observed with no discrimination in mind.

Regards,
  Reinhard

-- 

Reinhard Kotucha  Phone: +49-511-3373112
Marschnerstr. 25
D-30167 Hannover  mailto:reinhard.kotu...@web.de

Microsoft isn't the answer. Microsoft is the question, and the answer is NO.

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Re: [CentOS] netinstall

2012-08-26 Thread Reinhard Kotucha
On 2012-08-26 at 09:18:21 +0200, Yanis Guenane wrote:

  On Sun, Aug 26, 2012 at 3:12 AM, Joseph L. Casale jcas...@activenetwerx.com
   wrote:
  
   How can I insert a disc which is already inserted?  What am I
   missing?
  
   Well, pretty simple... You don't have the correct disc already
   inserted.
  
   Its a netinstall, hence the net so it needs the net. Its also
   only a couple hundred megs, so that should indicate it doesn't
   have the full tree available.
  
   Grab the dvd if you want to install from the same disc, or
   choose another method.
  
  
  As Joseph mention, if you downloaded the netinstall you should
  definitely use the net and not any CD/DVD installer.

Sorry Joseph and Yanis, I wasn't clear enough last night.  Maybe it
was too late.

I'm not talking about the packages but about the file install.img.
This file *IS* already on the netinstall CD and it's exactly the same
as the one I had to download.

I downloaded it again now in order to compare:

$ md5sum /media/dvd/images/install.img ~/downloads/install.img 
ef3b0e14ff354c41524600c00ef44000  /media/dvd/images/install.img
ef3b0e14ff354c41524600c00ef44000  /home/reinhard/downloads/install.img

In order to save time and traffic, it would be nice if I could use
it.  There is even a menu item but it doesn't work for me.

According to the error message, the installer assumed that the file
install.img is on another disc.  But this is not the case.  It's on
the netinstall CD already.

  http://www.if-not-true-then-false.com/2011/centos-6-netinstall-network-installation/
  
  This is a tutorial that will guide you through and points to the
  correct URL for package repositories and to the correct install.img
  file.

Sure, but the install.img file at the package repository isn't more
correct than the one on the netinstall CD.  They are identical.
The guy who wrote the tutorial obviously encountered the same problem
but wasn't aware of the file on the CD and suggested this workaround.

BTW, I got the system running.  But I fear that I'll have to install
it several times again because I'd like to experiment with virtual
machines and LVM.  It's very likely that I break something since I
have no experience with them.  Therefore it would save me some time if
I don't have to download a file which exists on the CD already.

Of course, it takes much more time to download and install the
packages, but in this case, once installation is started, I can do
something else meanwhile.

Another thing: Even if I can use install.img from the CD, at least
when I have to install packages, I have to specify an URL to a
repository.  Documentation proposes mirror.centos.org .  Is there a
reason why the installer doesn't offer the mirror URL as a default?

I ask because I have only one machine and whenever the installer asks
me for an URL, I have to abort and boot a system which provides a web
browser in order to read the documentation, write the URL down on
paper, and start the installer again.  Well, I sometimes have the
impression that I'm the only one in the world who doesn't have a
mobile phone with a built-in web browser. :)

Of course, specifying a particular server as a default isn't
reasonable, it would cause too much traffic there.  But given that
mirror.centos.org performs load balancing, wouldn't it be possible to
provide a default URL in the installer menu?  It would make
installation *much* more convenient.

Any idea why it hasn't been done?

Regards,
  Reinhard

-- 

Reinhard Kotucha  Phone: +49-511-3373112
Marschnerstr. 25
D-30167 Hannover  mailto:reinhard.kotu...@web.de

Microsoft isn't the answer. Microsoft is the question, and the answer is NO.

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[CentOS] netinstall

2012-08-25 Thread Reinhard Kotucha
Hi,
I just tried to install CentOS 6.3 netinstall and got the error
message  

  -- Disc Not Found --
  The CentOS disc was not found in any of your CDROM drives.  Please
  insert the CentOS disc and press OK to retry.

How can I insert a disc which is already inserted?  What am I missing?

Regards,
  Reinhard

-- 

Reinhard Kotucha  Phone: +49-511-3373112
Marschnerstr. 25
D-30167 Hannover  mailto:reinhard.kotu...@web.de

Microsoft isn't the answer. Microsoft is the question, and the answer is NO.

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