I have Ubuntu 18 OS and I am trying to prevent all users from running 'chpasswd' command after 17:00 o'clock. I need to use pam for this.

My /etc/pam.d/chpasswd file:

# The PAM configuration file for the Shadow 'chpasswd' service

@include common-password

password required       pam_pwquality.so retry=3
account required pam_time.so

My /etc/security/time.conf file:


I don't know why it does not work. I can run this command all day.

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