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NSS-RESOLVE(8)                   nss-resolve                  NSS-RESOLVE(8)

NAME         top

       nss-resolve, - Hostname resolution via

SYNOPSIS         top

DESCRIPTION         top

       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
       hostnames 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 [!UNAVAIL=return]" 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. It should be before the "files" entry, since
       systemd-resolved supports /etc/hosts internally, but with caching. To
       the contrary, it should be after "mymachines", to give hostnames
       given to local VMs and containers precedence over names received over
       DNS. Finally, we recommend placing "dns" somewhere after "resolve",
       to fall back to nss-dns if systemd-resolved.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         top

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

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

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

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

           netgroup:       nis

SEE ALSO         top

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

COLOPHON         top

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systemd 246                                                   NSS-RESOLVE(8)

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