"passwd:Modul tidak diketahui" – kesalahan saat mengubah kata sandi di CentOS/RHEL 6

Masalahnya

Saat mengubah kata sandi menggunakan perintah passwd, kesalahan berikut muncul:

"passwd: Module is unknown"

Solusinya

Ada modul PAM yang tidak dikenal pam_pwquality.so di /etc/pam.d/system-auth mengajukan. Modul pam_pwquality.so harus digunakan di CentOS/RHEL 7 daripada CentOS/RHEL 6.

# cat /etc/pam.d/system-auth
# This file is auto-generated.
# User changes will be destroyed the next time authconfig is run.
auth required pam_env.so
auth sufficient pam_unix.so nullok try_first_pass
auth requisite pam_succeed_if.so uid >= 500 quiet
auth required pam_deny.so

account required pam_unix.so
account sufficient pam_localuser.so
account sufficient pam_succeed_if.so uid < 500 quiet
account required pam_permit.so

password requisite pam_pwquality.so try_first_pass local_users_only retry=3 minlength=8 lcredit=0 ucredit=-1 dcredit=-1 ocredit=-1 authtok_type=
password requisite pam_cracklib.so ucredit=-1 minclass=3 ocredit=-1 enforce_for_root lcredit=-1 dcredit=-1 minlen=6
password requisite pam_pwhistory.so enforce_for_root remember=12
password sufficient pam_unix.so sha512 shadow nullok try_first_pass use_authtok
password required pam_deny.so

pam_pwquality.so digunakan untuk memeriksa kekuatan kata sandi dan menggantikan pam_cracklib.so di CentOS/RHEL 7. Hapus pam_pwquality.so ini dari file konfigurasi di CentOS/RHEL 6.

# grep pam_pwquality.so /etc/pam.d/system-auth
#

Sekarang coba ganti sandi lagi.

# passwd oracle
Changing password for user oracle.
New password: