/etc/security/pam_unix2.default is in libpam-unix2 1:2.6-2.
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 | # This file contains some information for
# the passwd (1) command and other tools
# creating or modifying passwords.
# Define default crypt hash
# CRYPT={des,md5,blowfish}
CRYPT=des
# Use another crypt hash for group passwords.
# This is used by gpasswd, fallback is the CRYPT entry.
# GROUP_CRYPT=des
# We can override the default for a special service
# by appending the service name (FILES, YP, NISPLUS, LDAP)
# for local files, use a more secure hash. We
# don't need to be portable here:
CRYPT_FILES=blowfish
# sometimes we need to specify special options for
# a hash (variable is prepended by the name of the
# crypt hash).
BLOWFISH_CRYPT_FILES=5
# For NIS, we should always use DES:
CRYPT_YP=des
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