display the system message buffer
dmesg utility displays the contents of the system
message buffer. If the
-M option is not specified, the
buffer is read from the currently running kernel via the
interface. Otherwise, the buffer is read from the specified core file, using
the name list from the specified kernel image (or from the default image).
The options are as follows:
- Show all data in the message buffer. This includes any syslog records and
- Clear the kernel buffer after printing.
- Extract values associated with the name list from the specified core.
-M is also specified, extract the name list
from the specified system instead of the default, which is the kernel
image the system has booted from.
- usually a snapshot of the buffer contents taken soon after file systems
are mounted at startup time
dmesg utility appeared in