systemd-resolved.service, systemd-resolved — Network Name Resolution manager
systemd-resolved.service
/usr/lib/systemd/systemd-resolved
systemd-resolved is a system service that
manages network name resolution. It implements a caching DNS stub
resolver and an LLMNR resolver and responder. It also generates
/run/systemd/resolve/resolv.conf for
compatibility which may be symlinked from
/etc/resolv.conf.
The DNS servers contacted are determined from the global
settings in
resolved.conf(5),
the per-link static settings in .network
files, and the per-link dynamic settings received over DHCP. See
systemd.network(5)
for more details.
Note that
/run/systemd/resolve/resolv.conf should not
be used directly, but only through a symlink from
/etc/resolv.conf.