On Sun, Jan 19, 2025, 7:58 AM <to...@tuxteam.de> wrote: > .... > [0] This is part of the libc and (roughly) translates host names to > IP addresses for the programs running in your box. Eventually, > it goes out to ask some DNS servers. >
Along the way it's (probably) consulting /etc/resolv.conf which is where the "resolver" gets most of its own config information. Such as how to "assume" the network name given only a hostname, and the order in which DNS servers should be queried and their names or network addresses. Then there's /etc/nsswitch.conf as already described below, that stands for "name-service switch". Originally a sort-of meta-config for name resolution, later other random configuration gunk got included there :-) [1] Some of those stars live in /etc/nsswitch.conf. Mine has, among > others: > > hosts: files mdns4_minimal [NOTFOUND=return] dns > > meaning that to resolve a host, you first look into /etc/hosts > (that's the "files"), then mdns (gotta remove that, no mdns here), > then DNS. >
