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DMESG(8)                  BSD System Manager's Manual                 DMESG(8)

NAME
     dmesg -- display the system message buffer

SYNOPSIS
     dmesg [-a] [-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.

     -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 sys-
             tem 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
     sysctl(3), syslogd(8)

HISTORY
     The dmesg utility appeared in 4.0BSD.

BSD                              June 5, 1993                              BSD