1. Login to the server as root.


2. Take backup of the file /lib/systemd/system/sssd.service.

# cp /lib/systemd/system/sssd.service /root/sssd.service_backup


3. Edit file /lib/systemd/system/sssd.service and add the following entry.

# vi /lib/systemd/system/sssd.service
ExecStartPost=/usr/bin/rm -f /var/lib/sss/pubconf/pam_preauth_available


4. Run the below command to reload the units and restart SSSD service.

# systemctl daemon-reload
# systemctl stop sssd
# rm -f /var/lib/sss/db/*
# systemctl start sssd


5. Check if the file is present.

# ls -l /var/lib/sss/pubconf/pam_preauth_available


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