/usr/share/doc/libnss-ldap/examples/groups.ldif is in libnss-ldap 265-3ubuntu2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 | dn: ou=Group,dc=example,dc=com
ou: Group
objectClass: organizationalUnit
objectClass: top
dn: cn=root,ou=Group,dc=example,dc=com
cn: root
objectClass: posixGroup
objectClass: top
gidNumber: 0
memberUid: 0
dn: cn=users,ou=Group,dc=example,dc=com
cn: users
objectClass: posixGroup
objectClass: top
gidNumber: 5000
memberUid: asuffield
memberUid: test
memberUid: test2
dn: cn=admin,ou=Group,dc=example,dc=com
cn: admin
objectClass: posixGroup
objectClass: top
gidNumber: 5001
memberUid: asuffield
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