Linux System Administration Intermediate II Quiz Questions and Answers
Answer :
Adding a new disk and extending the logical volume
Explanation :
Expanding the logical volume by adding a new disk allows immediate space increase with minimal service disruption, leveraging LVMs strengths. ---These questions are designed to test practical understanding and application of managing partitions and file systems within Linux, suited for an intermediate to advanced Linux System Administration course.
The `lvextend` command extends a logical volume. When used with the appropriate filesystem-specific command (like resizing ext4 with `resize2fs`), it ensures the filesystem extends to use the newly allocated space.---
A zombie process is caused when a parent process doesn't properly `wait` for its child's termination, leaving the child entry in the process table. It can be resolved by ensuring the parent process calls wait.
Lowering the nice value below 0 requires root permissions because it affects system performance and resource allocation significantly. Only privileged users can make such changes to ensure system stability.
To monitor and control incoming and outgoing network traffic based on security rules
Explanation :
The primary role of a firewall in a Linux system is to control incoming and outgoing network traffic based on predefined security rules, thereby enhancing security through restriction and monitoring.
Both `htop` and `top` provide interactive interfaces where you can view and change process priorities directly within the tool, making it easier to manage running processes.###
By running 'iptables-save > /etc/iptables/rules.v4'
Explanation :
To ensure that iptables rules are persistent across reboots, they should be saved using the 'iptables-save' command and stored in a specific file like '/etc/iptables/rules.v4'.
A set of rules and ports applied to interfaces, organizing network security policies by trust levels
Explanation :
Zones in 'firewalld' group interfaces with similar trust levels, applying relevant rules and ports, simplifying network security management and reflecting security policies.
To prevent data loss by restoring configuration if needed
Explanation :
Backing up LVM metadata is crucial because it contains vital information about the volume group configuration, and restoration can prevent data loss in case of corruption.
The process with nice value of -10 gets more CPU time.
Explanation :
Processes with lower nice values (more negative) have a greater scheduling priority and therefore receive more CPU time compared to those with higher nice values.###
