dmesg - To display or control the kernel ring buffer

Command syntax
       dmesg [ -c ] [ -n level ] [ -s bufsize ]

DESCRIPTION
       dmesg is used to examine or control the kernel ring buffer. It display the status of device drivers loaded into kernel when the system boots up.

After boot up also, if a new hardware peripheral is connected dmesg displays the message about that peripheral.

The message could be error message like device not connected or a success message.
 

It is helpful in analysing and debugging any hardware related issu ... Read more »