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[SOLVED] Command line mail taking too long to send; unable to qualify my own domain name

 
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Top Forums UNIX for Dummies Questions & Answers [SOLVED] Command line mail taking too long to send; unable to qualify my own domain name
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Old 02-05-2010
[SOLVED] Command line mail taking too long to send; unable to qualify my own domain name
Hello,

I'm having a problem with my mail. When I send mail, it takes a long time for the send to complete.

In the below, datestamp is just a simple script to put in a no-white-space date/time stamp.

Code:
$ datestamp ; mail woodnt; datestamp
02-05-10@193844
Subject: test
timer
Cc: 
02-05-10@193956

a tail -50 /var/log/syslog shows a problem with :

Code:
Feb  5 19:38:56 toshiba-laptop sendmail[10772]: My unqualified host name (toshiba-laptop) unknown; sleeping for retry
Feb  5 19:38:59 toshiba-laptop ypbind[1512]: broadcast: RPC: Timed out.
Feb  5 19:39:56 toshiba-laptop sendmail[10772]: unable to qualify my own domain name (toshiba-laptop) -- using short name
Feb  5 19:39:56 toshiba-laptop sendmail[10772]: o161duSX010772: from=woodnt, size=32, class=0, nrcpts=1, msgid=<201002060139.o161duSX010772@toshiba-laptop>, relay=woodnt@localhost
Feb  5 19:39:56 toshiba-laptop sm-mta[10774]: o161duNP010774: from=<woodnt@toshiba-laptop>, size=321, class=0, nrcpts=1, msgid=<201002060139.o161duSX010772@toshiba-laptop>, proto=ESMTP, daemon=MTA-v4, relay=localhost [127.0.0.1]
Feb  5 19:39:56 toshiba-laptop sendmail[10772]: o161duSX010772: to=woodnt, ctladdr=woodnt (1000/1000), delay=00:00:00, xdelay=00:00:00, mailer=relay, pri=30032, relay=[127.0.0.1] [127.0.0.1], dsn=2.0.0, stat=Sent (o161duNP010774 Message accepted for delivery)

Here is my /etc/hosts file:

Code:
$ cat /etc/hosts
127.0.0.1    localhost
#127.0.0.1    toshiba-laptop
192.168.1.50    dell-desktop
192.168.1.51    gateway
192.168.1.52    woodnt-laptop
192.168.1.53    fujitsu
192.168.1.54    toshiba-laptop
192.168.1.61    krista-netbook
192.168.1.62    luke-netbook
192.168.1.63    beth-netbook

# The following lines are desirable for IPv6 capable hosts
#::1     localhost ip6-localhost ip6-loopback
#fe00::0 ip6-localnet
#ff00::0 ip6-mcastprefix
#ff02::1 ip6-allnodes
#ff02::2 ip6-allrouters
#ff02::3 ip6-allhosts

Here is my ifconfig output showing the correct ip:

Code:
$ ifconfig wlan0
wlan0     Link encap:Ethernet  HWaddr 00:1e:65:07:72:c6  
          inet addr:192.168.1.54  Bcast:192.168.1.255  Mask:255.255.255.0
          inet6 addr: fe80::21e:65ff:fe07:72c6/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:131563 errors:0 dropped:0 overruns:0 frame:0
          TX packets:122576 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:127932916 (127.9 MB)  TX bytes:18785169 (18.7 MB)

Please note the lag between timestamp 19:38:59 and 19:39:56 where broadcast RCP timed out and it was unable to qualify my own domain name. Any idea how to fix this?

With thanks,
Narnie

---------- Post updated at 08:09 PM ---------- Previous update was at 08:02 PM ----------

Well, I figured it out just now after I posted this.

The last thing I tried was commenting out my hostname listing in /etc/hosts like so:
Code:
#192.168.1.54    toshiba-laptop

This is an auto-generated hosts file from a script I wrote to make sure all computers have the same hosts-file on my home network.

Evidently, it is not good to have your own hostname in the hosts file like this.

If any networking guru might want to comment on why this is so, this may help us mere amateurs learn from my mistake.

Hope this might help someone else that might ever have this problems.

Yours,
Narnie

---------- Post updated at 08:18 PM ---------- Previous update was at 08:09 PM ----------

I take it back. It isn't a fix.

When I commented out the computer in /etc/hosts, then the system gave this:

Code:
$ sudo su
sudo: unable to resolve host toshiba-laptop

and this:

Code:
$ ssh -p 50505 toshibia-laptop
ssh: Could not resolve hostname toshibia-laptop: Name or service not known

Now back to square one. How to resolve the original issue.

Narnie

---------- Post updated at 09:18 PM ---------- Previous update was at 08:18 PM ----------

OK, here's the "partial fix."

sendmail MUST have a fully qualified domain name or it gives this error. So "tweak" the /etc/hosts file like so:

Code:
127.0.0.1    localhost localhost.localdomain toshiba-laptop toshiba-laptop.foobar

That fixed both problems. mail now sends quickly and I can ssh to toshiba-laptop without error and do a sudo su without an error report.

The problem now is that I don't get mail. Hehe. Oh the joys ! Any ideas how to fix all these issues at once?

Cheerio,
Narnie

---------- Post updated at 09:31 PM ---------- Previous update was at 09:18 PM ----------

Ok, here is the real fix.

Code:
$ cat /etc/hosts
127.0.0.1    localhost localhost. toshiba-laptop toshiba-laptop.
192.168.1.50    dell-desktop
192.168.1.51    gateway
192.168.1.52    woodnt-laptop
192.168.1.53    fujitsu
192.168.1.54    toshiba-laptop.
192.168.1.61    krista-netbook
192.168.1.62    luke-netbook
192.168.1.63    beth-netbook

Note periods at the end the hosts of the 127.0.0.1 line and 192.158.1.54 as in:

localhost.
toshiba-laptop.

That satisfied sendmail and mail works immediately with no sleeping and actually delivers the mail !!! ssh'ing works as well now.

That problem is now solved. YEA! Now on to others Smilie

Cheerio all,
Narnie
 
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