NAME
dmesg —
display the system message
buffer
SYNOPSIS
dmesg |
[-ac] [-M
core [-N
system]] |
DESCRIPTION
Thedmesg 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
sysctl(3) 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:
-a- Show all data in the message buffer. This includes any syslog records and /dev/console output.
-c- Clear the kernel buffer after printing.
-M- Extract values associated with the name list from the specified core.
-N- If
-Mis also specified, extract the name list from the specified system instead of the default, which is the kernel image the system has booted from.
FILES
- /var/run/dmesg.boot
- usually a snapshot of the buffer contents taken soon after file systems are mounted at startup time
SEE ALSO
HISTORY
The dmesg utility appeared in
3BSD.