[K12OSN] LTSP Lab Slow to Boot

[Gideon Romm]

Well, there are two answers to this:

1.  No.  :) It cannot be turned off (as far as I know), because part of
sudo's capabilities are to limit what can be run as root by a particular
user *from a particular machine*, meaning Joe can run xyz from
localhost, but not from the fileserver remotely.  So, to determine host,
it needs to lookup hostname.

2.  If your "sudo" is slow for this reason, then it speaks to much
larger DNS issues that are most likely making lots of other things slow.
Your users most likely are not slow because they run sudo.  They will be
slow for the same reasons that sudo is slow.  So, better to fix the root
cause of the slowness (no pun intended) :).

Cheers,

-Gadi


On Tue, 2008-09-16 at 13:22 -0700, monteslu at cox.net wrote:
> This is a great piece of information. I also find sudo to be painfully slow.
> 
> Is there a reason it has to do a hostname lookup? Can that be turned off?
> 
> Luis
> 
> 
> 
> ---- Gideon Romm <ltsp at symbio-technologies.com> wrote: 
> > Stephen,
> > 
> > I don't know if you ever resolved your issue, but if it takes a long
> > time to sudo, chances are you have DNS issues.
> > 
> > Check to make sure your /etc/hosts, /etc/resolv.conf,
> > and /etc/nsswitch.conf all look healthy.
> > 
> > Then, check connectivity to the DNS server.
> > 
> > "sudo" does a get_hostname() lookup, and if your hostname lookups do not
> > work well, this will cause grief on thin client booting, as well as
> > slowness overall.
> > 
> > -Gideon
> > 
> > 
> > On Fri, 2008-09-05 at 12:52 -0400, Crampton, Stephen C. wrote:
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> > -- 
> > --------------------------------------------------------
> > Gideon Romm | Proud LTSP Developer
> > ltsp at symbio-technologies.com
> > 
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-- 
--------------------------------------------------------
Gideon Romm | Proud LTSP Developer
ltsp at symbio-technologies.com

Support LTSP!  Buy your hardware at:

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        www.DisklessThinClients.com 
 
(use coupon code: LTSP5P for 5% off thin clients from DisklessThinClients.com)