Tag Archives: dns
I stumbled on a strange problem regarding NFS, which I hadn’t used for a while on my server. I had some old exports which worked last time I used them, but not any more. I was doing an rsync and suddenly saw messages about chgrp or chmod failing. These messages are expected when uid/gid is not matching between server and client, so what’s up?
Running dmesg showed me messages like these:
Looking in /var/log/syslog I saw messages like these:
I finally found a working solution here.
Today I noticed I hadn’t received any mail from one of my servers for several weeks. Upon investigation I found that postfix seemed to have some trouble finding the target machine, due to what appeared to be some kind of name lookup problem. I think the problem might have been introduced through a system upgrade some weeks ago…
What’s strange is that this server could lookup the target machine just fine through DNS, in both forward and reverse.
This is what I got in the log /var/log/mail.info:
I googled this error message and found a suggestion to add a line in /etc/postfix/main.cf:
I recently switched mainboard in one of my computers, and suddenly eth0 becomes eth1. This makes my /etc/network/interfaces point to the wrong interface, thus not giving me the correct IP address, which in return makes DNS fail, which in return makes NFS fail… Let’s just say that a plethora of problem arise!
Showmount gives me this error message when I try to list exports on the NFS server: