The Fedora /etc/nsswitch.conf is based largely on the upstream
version with minor downstream distribution modifications for
use with SSSD and systemd.
diff --git a/nss/nsswitch.conf b/nss/nsswitch.conf
index 4a6bcb1f7bc0b1f4..980a68e32e6a04b8 100644
--- a/nss/nsswitch.conf
+++ b/nss/nsswitch.conf
@@ -1,7 +1,7 @@
#
# /etc/nsswitch.conf
-# An example Name Service Switch config file. This file should be
+# Name Service Switch config file. This file should be
# sorted with the most-used services at the beginning.
# Valid databases are: aliases, ethers, group, gshadow, hosts,
@@ -52,19 +52,21 @@
# shadow: db files
# group: db files
-# In alphabetical order. Re-order as required to optimize peformance.
+# In order of likelihood of use to accelerate lookup.
+passwd: sss files
+shadow: files
+group: sss files
+hosts: files dns myhostname
+services: files sss
+netgroup: sss
+automount: files sss
+
aliases: files
ethers: files
-group: files
gshadow: files
-hosts: files dns
# Allow initgroups to default to the setting for group.
# initgroups: files
-netgroup: files
networks: files dns
-passwd: files
protocols: files
publickey: files
rpc: files
-shadow: files
-services: files