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DMESG(8) | System Manager's Manual | DMESG(8) |
NAME¶
dmesg
— display
the system message buffer
SYNOPSIS¶
dmesg |
[-ac ] [-M
core [-N
system]] |
DESCRIPTION¶
The 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
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
-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.
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
4.0BSD.
May 9, 2013 | Debian |