2. Show the WDT environmental settings.
# cat /etc/default/watchdog
Read-status through sysfs interface
Table 17. WDT file descriptions
Read-only file location Description
/sys/class/watchdog/watchdog0/bootstatus
Contains status of the WDT device at boot. It is equivalent to
WDIOC_GETBOOTSTATUS of input-output control (ioctl)
interface.
/sys/class/watchdog/watchdog0/identity
Contains identity string of WDT device.
/sys/class/watchdog/watchdog0/nowayout
If the device supports nowayout while reading it provides a
value of 1, otherwise it is 0.
/sys/class/watchdog/watchdog0/state
Provides active/inactive status of WDT device.
/sys/class/watchdog/watchdog0/status
Contains the internal status of the WDT device. It is
equivalent to WDIOC_GETSTATUS of ioctl interface.
/sys/class/watchdog/watchdog0/timeleft
Contains value of time left for reset generation. It is
equivalent to WDIOC_GETTIMELEFT of ioctl interface.
/sys/class/watchdog/watchdog0/timeout
Contains the current value of timeout.
Trusted Platform Module (TPM)
NOTE: For more information about the TPM, see developer.ubuntu.com/en/snappy/guides/security-whitepaper/.
TPM hardware is installed on products with Snappy-enhanced security support. TPM is supported only on these devices that
have the TPM hardware installed. The TPM on/off setting is configurable in the BIOS and manageable through the Dell
Command | Configure application in the operating system.
1. Verify if the TPM module has been loaded.
(plano)ubuntu@localhost:~$ ls /dev/tpm0
ls: cannot access /dev/tpm0: No such file or directory
2. If TPM is turned on, the device node (/dev/tpm0) exists.
# ls /dev/tpm0
Activate TPM in Dell Command | Configure
Follow these steps to check TPM activation in the Dell Command | Configure application.
1. If not set, set the BIOS password.
# cctk --setuppwd=<new-BIOS-password>
2. If not enabled, enable TPM.
# cctk --tpm=on
3. Reboot the system.
# systemctl reboot
68
Setting up the operating system
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