Khadas Docs

Amazing Khadas, always amazes you!

User Tools

Site Tools

Home / products / sbc / common / applications / watchdog
products:sbc:common:applications:watchdog

Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Both sides previous revision Previous revision
Next revision 		Previous revision
products:sbc:common:applications:watchdog [2022/07/05 02:59]
frank fixup syntax error 		products:sbc:common:applications:watchdog [2022/12/05 01:43] (current)
nick
Line 3: Line 3:
 ===== Introduction ===== ===== Introduction =====
  
-This document mainly introduces Watchdog. You will learn how to enable the watchdog and test.+This page introduces the internal Watchdog. You will learn how to enable the watchdog and test it.
  
-===== Enable Watchdog =====+===== Enable Internal Watchdog =====
  
 Watchdog is disabled by default, use the commands below to enable it. Watchdog is disabled by default, use the commands below to enable it.
  
 <tabbox Ubuntu 18.04>  <tabbox Ubuntu 18.04> 
-```sh +```shell 
-khadas@Khadas:~$ sudo ln -s  /lib/systemd/system/watchdog.service /etc/systemd/system/multi-user.target.wants/watchdog.service +sudo ln -s  /lib/systemd/system/watchdog.service /etc/systemd/system/multi-user.target.wants/watchdog.service 
-khadas@Khadas:~$ sudo systemctl enable watchdog.service +sudo systemctl enable watchdog.service 
-khadas@Khadas:~$ sudo systemctl start watchdog.service+sudo systemctl start watchdog.service
 ``` ```
  
Line 21: Line 21:
  
 <tabbox Ubuntu 20.04>  <tabbox Ubuntu 20.04> 
- +```shell 
-khadas@Khadas:~$ sudo systemctl enable watchdog.service +sudo systemctl enable watchdog.service 
-khadas@Khadas:~$ sudo systemctl start watchdog.service +sudo systemctl start watchdog.service 
 +```
 </tabbox> </tabbox>
  
 Check watchdog status: Check watchdog status:
  
-```sh+```shell
 khadas@Khadas:~$ systemctl status watchdog.service  khadas@Khadas:~$ systemctl status watchdog.service 
 ● watchdog.service - watchdog daemon ● watchdog.service - watchdog daemon
Line 54: Line 54:
 lines 1-21/21 (END)  lines 1-21/21 (END) 
 ``` ```
-===== Test Watchdog =====+===== Test Internal Watchdog =====
  
 ==== Set Watchdog Timeout ==== ==== Set Watchdog Timeout ====
Line 62: Line 62:
 Restart the watchdog service to take effect. Restart the watchdog service to take effect.
  
-```sh +```shell 
-$ sudo systemctl restart watchdog+sudo systemctl restart watchdog
 ``` ```
  
Line 70: Line 70:
 Trigger a Kernel crash. Trigger a Kernel crash.
  
-```sh +```shell 
-khadas@Khadas:~$ sudo -i +echo 0 | sudo tee /sys/module/kernel/parameters/panic 
-root@Khadas:~# echo c > /proc/sysrq-trigger +echo c | sudo tee /proc/sysrq-trigger 
 ``` ```
  
Line 79: Line 79:
 You can also kill the watchdog daemon to prevent an automatic restart after a Kernel crash. You can also kill the watchdog daemon to prevent an automatic restart after a Kernel crash.
  
-```sh +```shell 
-khadas@Khadas:~$ sudo pkill -9 watchdog +$ sudo pkill -9 watchdog 
-khadas@Khadas:~$ sudo pkill -9 wd_keepalive +$ sudo pkill -9 wd_keepalive 
-khadas@Khadas:~$ +$ 
-khadas@Khadas:~$ +$ 
-khadas@Khadas:~$ G12B:BL:6e7c85:2a3b91;FEAT:E0F83180:402000;POC:F;RCY:0;EMMC:0;READ:0;0.+$ G12B:BL:6e7c85:2a3b91;FEAT:E0F83180:402000;POC:F;RCY:0;EMMC:0;READ:0;0.
 bl2_stage_init 0x01 bl2_stage_init 0x01
 bl2_stage_init 0x81 bl2_stage_init 0x81
Line 106: Line 106:
 If watchdog was setup successfully, the system will automatically reboot after the Kernel crash, in accordance with the timeout you have set above. If watchdog was setup successfully, the system will automatically reboot after the Kernel crash, in accordance with the timeout you have set above.
  
-===== Disable Watchdog =====+===== Disable Internal Watchdog =====
  
 Disable the Watchdog daemon. Disable the Watchdog daemon.
  
-```sh +```shell 
-khadas@Khadas:~$ sudo systemctl disable watchdog +sudo systemctl disable watchdog 
-khadas@Khadas:~$ sudo reboot+sudo reboot
 ``` ```
  
Last modified: 2022/07/05 02:59 by frank

Page Tools

Khadas Site

Khadas Community

Khadas GitHub

Khadas Downloads