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What command, without options or parameters, should be run to present the contents of the kernel ring-buffer?

You are not sure whether the kernel has detected a piece of hardware in your machine. What command, without options or parameters, should be run to present the contents of the kernel ring-buffer?

Which of the following commands will fix error “cannot find the root filesystem” by pointing the kernel im

A server was rebuilt using a full system backup but with a different disk setup. The kernel won’t boot, complaining it cannot find the root filesystem. Which of the following commands will fix this error by pointing the kernel image to the new root partition?