TLDR
Enter a command. For example: mate screenshot, e2label, run mailcap.

dmesg

 
Write the kernel messages to standard output. More information: https://manned.org/dmesg.
 
  • Show kernel messages:
     
    dmesg
     
  • Show kernel error messages:
     
    dmesg --level err
     
  • Show kernel messages and keep reading new ones, similar to tail -f (available in kernels 3.5.0 and newer):
     
    dmesg -w
     
  • Show how much physical memory is available on this system:
     
    dmesg | grep -i memory
     
  • Show kernel messages 1 page at a time:
     
    dmesg | less
     
  • Show kernel messages with a timestamp (available in kernels 3.5.0 and newer):
     
    dmesg -T
     
  • Show kernel messages in human-readable form (available in kernels 3.5.0 and newer):
     
    dmesg -H
     
  • Colorize output (available in kernels 3.5.0 and newer):
     
    dmesg -L

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