On 2022-01-22 at 18:38, gene heskett wrote: > On Saturday, January 22, 2022 4:20:07 PM EST Greg Wooledge wrote: > >> On Sat, Jan 22, 2022 at 01:57:38PM -0500, gene heskett wrote: > >>> So my resolv.conf says to search coyote.den, and failing that, >>> use my isp's nameserver [...] >> >> Again: that is NOT what the resolv.conf file does. >> >> The /etc/nsswitch.conf file *SHOULD* tell your system to use the >> /etc/hosts file first, and DNS second. At least, that's the >> default and the norm. > > Maybe I'm losing it, but I don't see any such directives in this > file, copy pasted from the miss-behaving machine. > ====================== > # /etc/nsswitch.conf
<snip> > hosts: files mdns4_minimal [NOTFOUND=return] dns This is the line which contains the directives involved. The 'files' directive tells your system to check local files first; the list of files involved is in the FILES section near the end of 'man nsswitch.conf', and /etc/hosts is in that list. The 'mdns4_minimal' directive tells your system to check "multicast DNS" first; I'm not familiar with the details of this, but Google should be helpful. The [NOTFOUND=return] tag says - I think - that if this check returns a report that the lookup was successful but that no match was found, the system should return that result and stop checking. The 'dns' directive tells your system to check the DNS system proper. Given that this is after the [NOTFOUND=return] tag, as far as I can see this should never be reached, but I presume it's there for a reason; my best guess is that mDNS will usually not be available, so the check will return UNAVAIL, which (per the man page) will by default tell the system to continue to the next check (which is this one). > I am not all that familiar with this file, is it funkity? I snipped most of the file, but it looks OK to me; at a glance, it looks roughly identical to the one I've got on my own computer. -- The Wanderer The reasonable man adapts himself to the world; the unreasonable one persists in trying to adapt the world to himself. Therefore all progress depends on the unreasonable man. -- George Bernard Shaw
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