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Diffstat (limited to 'system/watchdog/README')
| -rw-r--r-- | system/watchdog/README | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/system/watchdog/README b/system/watchdog/README new file mode 100644 index 0000000000000..c5732210bcab2 --- /dev/null +++ b/system/watchdog/README @@ -0,0 +1,29 @@ +Linux watchdog timer daemon + +This service periodically writes to /dev/watchdog - in the event +of it _not_ being able to do so, Linux may reset the system. + +For this to work a kernel driver for the aformentioned device needs +to be loaded. The module may be found in: + /lib/modules/$(uname -r)/kernel/drivers/char/watchdog + +It can be configured to try and fix things (such as networking) +before triggering a reboot. See the examples included in: + /usr/doc/watchdog-$VERSION/examples + +This package also contains the 'wd_keepalive' program by Marcel Jansen +which "can be run during critical periods when the normal watcdog +shouldn't be run. It will read from the same configuration file; +it will do no checks but will keep writing to the device. + +The watchdog was written and is maintained by Michael Meskes +(it is based on example code by Alan Cox). + +To enable the watchdog: make sure a kernel module gets loaded for it +(at boot) such as the 'softdog' or an actual hardware driver... +Then add the following to rc.local: + + # Start the watchdog timer deamon + if [ -x /etc/rc.d/rc.watchdog ]; then + /etc/rc.d/rc.watchdog start + fi |