nss-resolve, libnss_resolve.so.2 — Provide hostname resolution via systemd-resolved.service
libnss_resolve.so.2
nss-resolve is a plugin 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.
To activate the NSS module, "resolve
"
has to be added to the line starting with
"hosts:
" in
/etc/nsswitch.conf
.
It is recommended to place "resolve
" early
in the nsswitch.conf
line (but after the
"files
" entry), replacing the
"dns
" entry if it exists, to ensure DNS queries
are always routed via
systemd-resolved(8).
Here is an example /etc/nsswitch.conf
file that enables resolve correctly:
passwd: compat mymachines
group: compat mymachines
shadow: compat
hosts: files resolve mymachines myhostname
networks: files
protocols: db files
services: db files
ethers: db files
rpc: db files
netgroup: nis
Note that nss-resolve will chain-load
nss-dns if
systemd-resolved.service
is not running,
ensuring that basic DNS resolution continues to work if the
service is down.