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CS-505 · Linux (LAB)/Important Questions

Linux (LAB) (CS-505) - Important Questions

  1. Unit 514 Marks High Priority

    Describe steps to secure a Linux server: restrict root access, configure ACLs, restrict FTP and monitor superuser activity.

    Comprehensive question covering multiple Unit 5 topics; reflected in global top question.

  2. Unit 57 Marks High Priority

    Explain the standard Linux file permission model. How do user, group, and others permissions work? Give examples using chmod, chown and chgrp to set common permission scenarios.

    Core concept: basic file access controls and practical commands.

  3. Unit 510 Marks Medium Priority

    What are ACLs (Access Control Lists) in Linux? Explain how to set, view and remove ACL entries using setfacl and getfacl with practical examples.

    Direct Unit 5 topic: ACL configuration and management using setfacl/getfacl.

  4. Unit 510 Marks High Priority

    Discuss methods to restrict root or superuser access on a Linux system. Include configuration of /etc/sudoers, use of sudoers entries, disabling direct root SSH login, and use of policykit/role-based controls.

    Restricting root access is a key security topic in Unit 5; includes sudoers and SSH configuration.

  5. Unit 57 Marks Medium Priority

    Write the commands and the sshd_config changes required to disable direct SSH root login and to force key-based authentication for user logins. Explain steps to apply the changes safely.

    Practical lab task focused on SSH hardening to prevent direct root login and enforce key-based auth.

  6. Unit 57 Marks Medium Priority

    Explain the purpose of TCP wrappers. Show how to configure /etc/hosts.allow and /etc/hosts.deny to restrict access to services with examples for sshd and vsftpd.

    Unit 5 topic: host-based access control using TCP wrappers and hosts.allow/hosts.deny.

  7. Unit 510 Marks Medium Priority

    Describe how to audit and monitor superuser activity on a Linux system. Include use of auditd/ausearch, system logs, shell history considerations and basic reporting commands.

    Monitoring and auditing superuser activity for accountability and forensic review.

  8. Unit 514 Marks Low Priority

    Compare and contrast traditional Unix file permissions, POSIX ACLs and mandatory access control systems such as SELinux or AppArmor. Discuss scenarios where each mechanism is most appropriate.

    Higher-level comparative question linking discretionary ACLs and mandatory access controls (SELinux/AppArmor).

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