To ensure that filenames with spaces are treated as single arguments in a script, you should modify the OIFS (Original Internal Field Separator) variable. This allows you to temporarily change the IFS value to a specific character (e.g., newline) and then restore it to its original value after processing the filenames. This ensures that spaces don't break the filenames into multiple arguments.

The /proc/cpuinfo file in the /proc directory is used to gather information about the system's CPU. It provides details about the processor, including its model, speed, and features. This is a valuable resource for understanding the CPU's capabilities and characteristics.

The primary distinction between top and htop is that top displays real-time data about system processes, whereas htop provides more interactivity and customization. htop allows users to sort and filter processes, view detailed information, and easily send signals to processes directly from the interface. While both tools show similar information, htop offers a more user-friendly and feature-rich experience for process monitoring.

The Sysctl feature allows a system administrator to dynamically alter the kernel's behavior without rebooting. It provides a way to modify kernel parameters at runtime, making it a powerful tool for fine-tuning system behavior.

In Linux, services that are set to restart automatically after a failure are said to be "Autorestart." This feature ensures that critical services can recover from failures and continue running, enhancing system reliability and availability.

The while loop in shell scripting tests the condition before executing the body of the loop. It will repeatedly execute the loop body as long as the specified condition remains true.

The primary keyword to start a loop that will iterate a fixed number of times in shell scripting is for. The for loop allows you to specify the number of iterations and is commonly used for such purposes.

To restrict SSH access to specific users, you would modify the /etc/ssh/sshd_config file. This file contains the configuration options for the SSH server, including settings related to user access, authentication, and permissions.

In the context of containers, "OCI" stands for the "Open Container Initiative." OCI is a standardized and open industry effort that defines container specifications and runtime standards, ensuring compatibility and portability between different container runtimes.

The correct option is resize2fs. The resize2fs utility is used to resize (grow or shrink) ext2, ext3, and ext4 file systems. It allows you to adjust the size of the file system to match the size of the underlying disk or partition. This is a crucial tool for managing file system sizes in Linux.

The "passwd" command in Linux allows you to enforce a user to change their password upon the next login. This is often used for security reasons, such as when a user's password has expired.

OpenVPN is considered highly secure and commonly used in Linux. It's an open-source VPN protocol that provides strong encryption and is widely trusted for creating secure network connections.