1KDUMPCTL(8)                 System Manager's Manual                KDUMPCTL(8)
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NAME

6       kdumpctl - control interface for kdump
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SYNOPSIS

10       kdumpctl COMMAND
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DESCRIPTION

14       kdumpctl is used to check or control the kdump service.  In most cases,
15       you should use systemctl to start / stop /  enable  kdump  service  in‐
16       stead.  However,  kdumpctl provides more details for debug and a helper
17       to setup ssh key authentication.
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COMMANDS

21       start  Start the service.
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23       stop   Stop the service.
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25       status Prints the current status of kdump service.  It returns non-zero
26              value if kdump is not operational.
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28       restart
29              Is equal to start; stop
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31       reload reload crash kernel image and initramfs without triggering a re‐
32              build.
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34       rebuild
35              rebuild the crash kernel initramfs.
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37       propagate
38              Helps to setup key authentication for ssh storage since it's im‐
39              possible to use password authentication during kdump.
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41       showmem
42              Prints   the  size  of  reserved  memory  for  crash  kernel  in
43              megabytes.
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45       estimate
46              Estimate a suitable crashkernel value for current machine.  This
47              is a best-effort estimate. It will print a recommanded crashker‐
48              nel value based on current kdump setup, and list some details of
49              memory usage.
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51       reset-crashkernel [KERNEL]
52              Reset  crashkernel  value to default value. kdumpctl will try to
53              read from /usr/lib/modules/<KERNEL>/crashkernel.default and  re‐
54              set  specified  kernel's crashkernel cmdline value. If no kernel
55              is specified, will reset current  running  kernel's  crashkernel
56              value.  If /usr/lib/modules/<KERNEL>/crashkernel.default doesn't
57              exist, will simply exit return 1.
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SEE ALSO

62       kdump.conf(5), mkdumprd(8)
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66kexec-tools                       2015-07-13                       KDUMPCTL(8)
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