Which command is used to view the kernel ring buffer messages?

Which command is used to view the kernel ring buffer messages?

• A. view
• B. dmesg
• C. cat
• D. grep

Answer: (B)

The command used to view the kernel ring buffer messages is "dmesg." This command retrieves and displays messages produced by the kernel, which can include information about hardware events, driver initialization, and system boot processes. The kernel ring buffer holds these messages in memory, allowing users to access them even after system events have occurred. While other commands like "cat" or "grep" can be used to display contents of files or filter outputs based on patterns, they are not specifically designed to interact with the kernel ring buffer directly. "view" is a command used for viewing files but does not apply to the specific purpose of displaying kernel messages. Therefore, "dmesg" is the most appropriate command for accessing kernel-related information efficiently.

The command used to view the kernel ring buffer messages is "dmesg." This command retrieves and displays messages produced by the kernel, which can include information about hardware events, driver initialization, and system boot processes. The kernel ring buffer holds these messages in memory, allowing users to access them even after system events have occurred.

While other commands like "cat" or "grep" can be used to display contents of files or filter outputs based on patterns, they are not specifically designed to interact with the kernel ring buffer directly. "view" is a command used for viewing files but does not apply to the specific purpose of displaying kernel messages. Therefore, "dmesg" is the most appropriate command for accessing kernel-related information efficiently.