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.TH KDUMPCTL 8 2015-07-13 kexec-tools
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.SH NAME
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kdumpctl \- control interface for kdump
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.SH SYNOPSIS
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.B kdumpctl
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.I COMMAND
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.SH DESCRIPTION
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.B kdumpctl
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is used to check or control the kdump service.
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In most cases, you should use
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.B systemctl
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to start / stop / enable kdump service instead. However,
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.B kdumpctl
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provides more details for debug and a helper to setup ssh key authentication.
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.SH COMMANDS
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.TP
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.I start
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Start the service.
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.TP
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.I stop
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Stop the service.
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.TP
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.I status
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Prints the current status of kdump service.
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It returns non-zero value if kdump is not operational.
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.TP
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.I restart
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Is equal to
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.I start; stop
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.TP
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.I reload
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reload crash kernel image and initramfs without triggering a rebuild.
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.TP
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.I rebuild
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rebuild the crash kernel initramfs.
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.TP
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.I propagate
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Helps to setup key authentication for ssh storage since it's
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impossible to use password authentication during kdump.
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.TP
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.I showmem
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Prints the size of reserved memory for crash kernel in megabytes.
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.TP
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.I estimate
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Estimate a suitable crashkernel value for current machine. This is a
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best-effort estimate. It will print a recommanded crashkernel value
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based on current kdump setup, and list some details of memory usage.
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.TP
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.I reset-crashkernel [KERNEL]
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Reset crashkernel value to default value. kdumpctl will try to read
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from /usr/lib/modules/<KERNEL>/crashkernel.default and reset specified
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kernel's crashkernel cmdline value. If no kernel is
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specified, will reset current running kernel's crashkernel value.
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If /usr/lib/modules/<KERNEL>/crashkernel.default doesn't exist, will
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simply exit return 1.
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.SH "SEE ALSO"
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.BR kdump.conf (5),
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.BR mkdumprd (8)
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