If you have been using Linux for some time, you will likely have come to appreciate how stable and configurable it is, especially if you have some idea of managing a Linux system well. One such tool in managing a system is checking the dmesg kernel log regularly, and especially when there is a problem with the system. The first place to go to is often the dmesg log.
This is a companion discussion topic for the original entry at https://linuxconfig.org/what-is-dmesg-and-how-do-i-use-it