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Identify and Fix Pluggable Authentication (PAM) Issues

In this exercise, you will need to troubleshoot and resolve authentication issues preventing Samba access. *This course is not approved or sponsored by Red Hat.*

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Level
Clock icon Advanced
Duration
Clock icon 1h 0m
Last updated
Clock icon Jul 27, 2025

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Table of Contents

  1. Challenge

    Verify the Samba service.

    Verify the service is running:

    systemctl status smb

    Attempt to view the listing of shares on the localhost:

    smbclient -U cloud_user -L localhost

    Password: Welcome1

  2. Challenge

    Resolve authentication issue.

    Check /var/log/secure for any errors:

    tail /var/log/secure

    Check the Samba logs for any errors:

    tail /var/log/samba/log.smbd

    View the PAM service file:

    cat /etc/pam.d/samba

    Verify the package to see if any PAM files are changed:

    rpm -V samba

    Move the changes PAM file to /root/samba.pam.old:

    mv /etc/pam.d/samba /root/samba.pam.old

    Reinstall Samba to restore the original PAM file:

    yum reinstall -y samba

    Restart the Samba service:

    systemctl restart smb

    View the listing of shares on the localhost:

    smbclient -U cloud_user -L localhost
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