WDCTL(8)                    System Administration                   WDCTL(8)

NAME         top

       wdctl - show hardware watchdog status

SYNOPSIS         top

       wdctl [options] [device...]

DESCRIPTION         top

       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 than 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

OPTIONS         top

       -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

       -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.

       -V, --version
              Display version information and exit.

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

AUTHORS         top

       Karel Zak ⟨⟩
       Lennart Poettering ⟨⟩

AVAILABILITY         top

       The wdctl command is part of the util-linux package and is available
       from Linux Kernel Archive 

COLOPHON         top

       This page is part of the util-linux (a random collection of Linux
       utilities) project.  Information about the project can be found at 
       ⟨⟩.  If you have a
       bug report for this manual page, send it to  This page was obtained from the
       project's upstream Git repository
       ⟨git://⟩ on
       2020-02-08.  (At that time, the date of the most recent commit that
       was found in the repository was 2020-02-05.)  If you discover any
       rendering problems in this HTML version of the page, or you believe
       there is a better or more up-to-date source for the page, or you have
       corrections or improvements to the information in this COLOPHON
       (which is not part of the original manual page), send a mail to

util-linux                        July 2014                         WDCTL(8)