NAME

       nss-resolve, libnss_resolve.so.2 - Provide hostname resolution via systemd-resolved.service

SYNOPSIS

       libnss_resolve.so.2

DESCRIPTION

       nss-resolve is a plug-in module for the GNU Name Service Switch (NSS) functionality of the GNU C Library
       (glibc) enabling it to resolve host names via the systemd-resolved(8) local network name resolution
       service. It replaces the nss-dns plug-in module that traditionally resolves hostnames via DNS.

       To activate the NSS module, add "resolve" to the line starting with "hosts:" in /etc/nsswitch.conf.
       Specifically, it is recommended to place "resolve" early in /etc/nsswitch.conf's "hosts:" line (but after
       the "files" or "mymachines" entries), right before the "dns" entry if it exists, followed by
       "[!UNAVAIL=return]", to ensure DNS queries are always routed via systemd-resolved(8) if it is running,
       but are routed to nss-dns if this service is not available.

       Note that systemd-resolved will synthesize DNS resource records in a few cases, for example for
       "localhost" and the current hostname, see systemd-resolved(8) for the full list. This duplicates the
       functionality of nss-myhostname(8), but it is still recommended (see examples below) to keep
       nss-myhostname configured in /etc/nsswitch.conf, to keep those names resolveable if systemd-resolved is
       not running.

EXAMPLE

       Here is an example /etc/nsswitch.conf file that enables nss-resolve correctly:

           passwd:         compat mymachines systemd
           group:          compat mymachines systemd
           shadow:         compat

           hosts:          files mymachines resolve [!UNAVAIL=return] dns myhostname
           networks:       files

           protocols:      db files
           services:       db files
           ethers:         db files
           rpc:            db files

           netgroup:       nis

SEE ALSO

       systemd(1), systemd-resolved(8), nss-systemd(8), nss-myhostname(8), nss-mymachines(8), nsswitch.conf(5)