DMESG(8)                COMMAND REFERENCE                DMESG(8)



NAME
     dmesg - collect system diagnostic messages to form error log

SYNOPSIS
     /etc/dmesg [ -i ] [ -f kernelfile ] [ -c corefile ]

DESCRIPTION
     Dmesg looks in a system buffer for recently printed
     diagnostic messages and prints them on the standard output.
     The messages are those printed by the system if hardware
     errors occur and occasionally when system tables overflow
     non-fatally.

OPTIONS
     -i       incrementally computes the new messages since the
              last time it was run with the -i flag and places
              these on the standard output.  This is typically
              used with cron(8) to produce the error log
              /usr/adm/messages by running the command

                   /etc/dmesg -i >> /usr/adm/messages

              every 10 minutes.

     -f kernelfile
              File used to get a pointer to the system message
              buffer.  Defaults to /dev/cvt.

     -c corefile
              File in which the current system message buffer is
              found.  The pointer obtained from kernelfile is
              used as an offset into corefile. Defaults to
              /dev/kmem.

FILES
     /usr/adm/messages
                    error log (conventional location)

     /usr/adm/msgbuf
                    scratch file for memory of -i option

CAVEATS
     The -i flag should only be mentioned in crontab since the
     scratch file is global and using it elsewhere may cause
     messages to be lost from /usr/adm/messages.

     The system error message buffer is of small finite size.  As
     dmesg is run only every few minutes, not all error messages
     are guaranteed to be logged.

     Error diagnostics generated immediately before a system
     crash will never get logged.



Printed 4/6/89                                                  1

DMESG(8)                COMMAND REFERENCE                DMESG(8)



SEE ALSO
     cron(8).





















































Printed 4/6/89                                                  2

%%index%%
na:264,112;
sy:376,343;
de:719,398;
op:1117,1040;
fi:2157,285;
ca:2442,585;
se:3363,153;
%%index%%000000000122