On 01/04/15 15:20, Mick wrote:
On Sunday 04 Jan 2015 16:06:50 Urs Schütz wrote:
Hi list
While hunting down slow startx times (12-16s instead the usual 2-5s) I
found that "hostname -f" tries to resolve the hostname. This is a slow
process (timeout?):
urs@cadd ~ $ time hostname -v
gethostname()=`cadd'
cadd
real 0m0.001s
user 0m0.000s
sys 0m0.001s
urs@cadd ~ $ time hostname -v -f
gethostname()=`cadd'
Resolving `cadd' ...
Result: h_name=`cadd'
Result: h_addr_list=`127.0.0.1'
cadd
real 0m10.011s
user 0m0.000s
sys 0m0.001s
urs@cadd ~ $ man hostname
...snip...
-f, --fqdn, --long
Display the FQDN (Fully Qualified Domain Name). A FQDN
consists
of a short host name and the DNS domain name. Unless
you are
using bind or NIS for host lookups you can change the
FQDN and
the DNS domain name (which is part of the FQDN)
in the
/etc/hosts file.
...snip...
My /etc/hosts.conf orders hosts before bind:
urs@cadd ~ $ grep order /etc/host.conf
# recognized are order, trim, mdns, multi, nospoof, spoof, and reorder.
order hosts, bind
I do not run any NIS or bind services.
I solved the slow startx by replacing "hostname -f" by "hostname" in the
/usr/bin/startx script, but still feel that I'm missing the real cause
for the slow hostname lookup.
I do not have a DNS domain name definition in /etc/hosts.
I do run networkmanager.
Any hints where to search?
What is the recommended way for /etc/hosts? I'm at a simple home
network, behind a NAT cable modem, and do not have a dns domain name.
Thanks for any hints.
Urs
In my /etc/hosts I have something like this:
# IPv4 and IPv6 localhost aliases
127.0.0.1 cad.homeLAN localhost cad
::1 cad.homeLAN localhost cad
See if this solves your problem.
PS. I remember a thread in this M/L about the correct way to configure a
domain name and why how the Gentoo Handbook was wrong. I think there was a
bug opened about it, too.
Setting up /etc/hosts exactly as above did resolve the slow hostname -f
lookup.
urs@cadd ~ $ time hostname -v -f
gethostname()=`cadd'
Resolving `cadd' ...
Result: h_name=`cadd.homeLAN'
Result: h_aliases=`localhost'
Result: h_aliases=`cadd'
Result: h_addr_list=`::1'
cadd.homeLAN
real 0m0.001s
user 0m0.000s
sys 0m0.000s
:-) Thanks for your help.
Urs
