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SAVECORE(8)             FreeBSD System Manager's Manual            SAVECORE(8)

     savecore -- save a core dump of the operating system

     savecore -c
     savecore -C [-v] [directory device]
     savecore [-fkvz] [directory [device ...]]

     The savecore utility copies a core dump into directory, or the current
     working directory if no directory argument is given, and enters a reboot
     message and information about the core dump into the system log.

     The options are as follows:

     -C      Check to see if a dump exists, and display a brief message to
             indicate the status.  An exit status of 0 indicates that a dump
             is there, 1 indicates that none exists.  This option is compati-
             ble only with the [-v] option.

     -c      Clear the dump, so that future invocations of savecore will
             ignore it.

     -f      Force a dump to be taken even if either the dump was cleared or
             if the dump header information is inconsistent.

     -k      Do not clear the dump after saving it.

     -v      Print out some additional debugging information.  Specify twice
             for more information.

     -z      Compress the core dump and kernel (see gzip(1)).

     The savecore utility looks for dumps on each device specified by the
     device argument(s), or on each device in /etc/fstab marked as ``dump'' or
     ``swap''.  The savecore utility checks the core dump in various ways to
     make sure that it is complete.  If it passes these checks, it saves the
     core image in directory/vmcore.# and information about the core in
     directory/info.# The ``#'' is the number from the first line of the file
     directory/bounds, and it is incremented and stored back into the file
     each time savecore successfully runs.

     The savecore utility also checks the available disk space before attempt-
     ing to make the copies.  If there is insufficient disk space in the file
     system containing directory, or if the file directory/minfree exists and
     the number of free kilobytes (for non-superusers) in the file system
     after the copies were made would be less than the number in the first
     line of this file, the copies are not attempted.

     If savecore successfully copies the kernel and the core dump, the core
     dump is cleared so that future invocations of savecore will ignore it.

     The savecore utility is meant to be called near the end of the initial-
     ization file /etc/rc (see rc(8)).

     gzip(1), getbootfile(3), dumpon(8), syslogd(8)

     The savecore utility appeared in 4.1BSD.

     The minfree code does not consider the effect of compression or sparse

FreeBSD 6.2                    February 24, 2005                   FreeBSD 6.2


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