The dmesg command

The `dmesg` command is a diagnostic tool in Linux systems, used to display kernel messages and system logs. It allows users to view real-time or historical information about the boot process, system events, hardware interactions, and any errors that may occur during system initialization. When you run `dmesg`, it shows the kernel ring buffer, which accumulates log entries until either it fills up (then older messages get overwritten) or you clear it manually. This command is particularly useful for troubleshooting issues, monitoring kernel activity, or understanding system behavior. To see the latest messages, use `dmesg | tail`. If you want to save the output for later analysis, you can append it to a file using `dmesg > log.txt`.