Scenario / Questions
I have almost fresh Ubuntu desktop box. OS was installed two weeks ago and updated from karmic repositories. Last week I had no problems with DNS. But this week something had changed. I’m not sure what and when, and not sure whether I changed any configs.
So now I have some really weird situation. According to logs name resolving should work normally.
127.0.0.1 localhost test 127.0.1.1 desktop
order hosts,bind multi on
# Generated by NetworkManager search search servers obtained via DHCP nameserver 192.168.0.3
passwd: compat group: compat shadow: compat hosts: files mdns4_minimal [NOTFOUND=return] dns mdns4 networks: files protocols: db files services: db files ethers: db files rpc: db files netgroup: nis
But if fact it is not.
user@test ~>ping test
PING localhost (127.0.0.1) 56(84) bytes of data. [skip]
Pinging is ok.
user@test ~>host test
test.mydomain.com has address xx.xxx.161.201
I suspect that NetworkManager might cause this misbehavior, but don’t know where to start to check it.
Any thoughts, suggestions?
Find below all possible solutions or suggestions for the above questions..
With this configuration, most applications will happily work with your entry from
host doesn’t look at
/etc/nsswitch.conf. That is by design, not by accident, since
host is specifically a DNS lookup program.
/etc/hosts is not DNS, it’s (mostly) what we used before we had DNS.
The same is also true for
nslookup – they’re DNS specific too.
host command (along with
nslookup) is part of the
bind DNS utilities. As a DNS resolver utility, it does DNS resolution alone.
If you’re interested in fetching an entry from any
libnss-driven data store, you can use the
getent program. To get a hosts entry, for example, use it like this:
getent hosts google.com
This follows the resolution order set out under
/etc/nsswitch.conf in order, which includes
/etc/hosts if “files” is lised as one of the options.
For me this issue occurred due to incorrect file permissions. Only root could read /etc/hosts. The file should be world-readable.
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Source: hosts file seems to be ignored