Here's one for the archives (because I've asked about this here).
I've been suffering from a long-standing (as in 2+ years) problem with
sendmail taking a VERY long time to start during bootup. The delay at that
line during the bootup logging has always been some multiple of 2 minutes
which suggested some sort of network time-out but, try as I might, I couldn't
figure out what was wrong.
The problem also manifested itself as certain X programs that took an
inordinately long time (some multiple of 2 minutes, again) to launch.
Sometimes the problems would only show when I was one someone else's
network but, in Red Hat 9, the failures happened everywhere. So it was time
to try (yet again) to find out what was configured wrong somewhere.
A few minutes ago I was searching at http://www.linuxquestions.org/ and
finally located the answer. I've made the change, rebooted and tested various
things and the problem seems to be solved with no negative side effects.
Hooray! (But, to be honest, I haven't booted on a "alien" network so my
celebration may be premature.)
The problem (at least here on my own network) was in my /etc/hosts file.
I've included the "slow" and "fast" contents below but, basically, the answer
was to add ".localdomain" to all the entries (in my local domain).
SLOW starting sendmail, /etc/hosts follows:
# Do not remove the following line, or various programs
# that require network functionality will fail.
127.0.0.1 localhost.localdomain localhost
192.168.1.1 firewall
192.168.1.10 gort
192.168.1.11 klaatu
192.168.1.102 bobby
192.168.1.201 printer
FAST starting sendmail, /etc/hosts follows:
# Do not remove the following line, or various programs
# that require network functionality will fail.
127.0.0.1 localhost.localdomain localhost
192.168.1.1 firewall.localdomain firewall
192.168.1.10 gort.localdomain gort
192.168.1.11 klaatu.localdomain klaatu
192.168.1.102 bobby.localdomain bobby
192.168.1.201 printer.localdomain printer
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