man > wdctl(8)

WDCTL(8)                                System Administration                               WDCTL(8)

NAME
       wdctl - show hardware watchdog status

SYNOPSIS
       wdctl [options] [device...]

DESCRIPTION
       Show hardware watchdog status. The default device is /dev/watchdog. If more than one device
       is specified then the output is separated by one blank line.

       If the device is already used or user has no permissions to read from the device, then wdctl
       reads data from sysfs. In this case information about supported features (flags) might be
       missing.

       Note that the number of supported watchdog features is hardware specific.

OPTIONS
       -f, --flags list
           Print only the specified flags.

       -F, --noflags
           Do not print information about flags.

       -I, --noident
           Do not print watchdog identity information.

       -n, --noheadings
           Do not print a header line for flags table.

       -o, --output list
           Define the output columns to use in table of watchdog flags. If no output arrangement is
           specified, then a default set is used. Use --help to get list of all supported columns.

       -O, --oneline
           Print all wanted information on one line in key="value" output format.

       -p, --setpretimeout seconds
           Set the watchdog pre-timeout in seconds. A watchdog pre-timeout is a notification
           generated by the watchdog before the watchdog reset might occur in the event the watchdog
           has not been serviced. This notification is handled by the kernel and can be configured
           to take an action using sysfs or by --setpregovernor.

       -g, --setpregovernor governor
           Set pre-timeout governor name. For available governors see default wdctl output.

       -r, --raw
           Use the raw output format.

       -s, --settimeout seconds
           Set the watchdog timeout in seconds.

       -T, --notimeouts
           Do not print watchdog timeouts.

       -x, --flags-only
           Same as -I -T.

       -h, --help
           Display help text and exit.

       -V, --version
           Print version and exit.

AUTHORS
       Karel Zak <kzak AT redhat.com>, Lennart Poettering <lennart AT poettering.net>

REPORTING BUGS
       For bug reports, use the issue tracker at https://github.com/util-linux/util-linux/issues.

AVAILABILITY
       The wdctl command is part of the util-linux package which can be downloaded from Linux Kernel
       Archive <https://www.kernel.org/pub/linux/utils/util-linux/>.

util-linux 2.39.3                            2023-10-23                                     WDCTL(8)