Quiz: what a process is doing

One correct answer

There was an ext4 error during the night, the machine was rebooted in the morning, and sudo dmesg no longer has it. Where do you find it?

• A Nowhere — kernel lines are lost on reboot.
• B In sudo dmesg -T — the option shows old lines too.
• C In the log of the previous boot: sudo journalctl -k -b -1.