On Fri, Sep 15, 2017 at 06:32:17PM -0300, x9p wrote:
>
> > Your snippet of strace output on pastebin is lacking the beginning.
> > What I'm currently interested in are:
> >
> > 1) Libraries and configuration files that sudo is opening (hence the
> > 'open' syscall). Thinking about it, make it 'open,stat'.
> >
> > 2) What kind of network sockets (short of kinda obvious UDP) sudo is
> > opening (hence the 'connect' syscall).
> >
>
> Sorry for that, pasted the full output here.
> https://pastebin.com/0bV7JC1z
>
> > Feel free to edit out all unnecessary details of course.
>
> No need.
Thanks, now I see it.
Your /etc/hosts says:
127.0.0.1 localhost
127.0.1.1 localhost
::1 localhost ip6-localhost ip6-loopback
Note the absence of localhost.localdomain.
Your hostname is "localhost.localdomain", as strace helpfully shows us:
uname({sysname="Linux", nodename="localhost.localdomain", ...})
I won't say that specifying fqdn as nodename is wrong per se, but in
your case you don't have a record for your hostname in /etc/hosts.
This *could* be the case that's nss-myhostname is designed for but …
it's the last in your nsswitch.conf so it cannot come into play.
Therefore libc resolver you're using does exactly the same way it's
supposed to - search for localhost.localdomain in /etc/hosts first,
query DNS next.
Quick and dirty way to fix this is to add a record for
'localhost.localdomain' in your /etc/hosts.
Correct, but painful way (I won't even try to predict what you could
break in your setup) to fix this is to ensure that your hostname is
'localhost' verbatim.
Reco
