Linux command
watchdog 命令
安全
权限或系统影响较大，执行前请核对目标。
常用示例
Start watchdog daemon
sudo systemctl start watchdog
Enable at boot
sudo systemctl enable watchdog
Test configuration
sudo watchdog -v
Run in foreground
sudo watchdog -f
Force test mode
sudo watchdog -F
说明
watchdog is a daemon that monitors system health and resets the system if problems are detected. It periodically writes to /dev/watchdog to prevent the kernel from triggering a hardware reset. The daemon can monitor various system conditions: load average, memory usage, file presence, process existence, temperature, and custom test scripts. If any check fails, the system reboots after logging the failure reason. Hardware watchdog support requires appropriate kernel modules (e.g., iTCO_wdt for Intel). Software watchdog via the softdog module provides fallback when hardware isn't available.
参数
- -f, --foreground
- Run in foreground, don't fork.
- -F, --force
- Force test mode.
- -v, --verbose
- Verbose output.
- -c _file_
- Use specified configuration file.
- -s, --sync
- Sync before reboot.
- --help
- Display help.
FAQ
What is the watchdog command used for?
watchdog is a daemon that monitors system health and resets the system if problems are detected. It periodically writes to /dev/watchdog to prevent the kernel from triggering a hardware reset. The daemon can monitor various system conditions: load average, memory usage, file presence, process existence, temperature, and custom test scripts. If any check fails, the system reboots after logging the failure reason. Hardware watchdog support requires appropriate kernel modules (e.g., iTCO_wdt for Intel). Software watchdog via the softdog module provides fallback when hardware isn't available.
How do I run a basic watchdog example?
Run `sudo systemctl start watchdog` in a terminal, then adjust file names, paths, flags, or remote targets for your system.
What does -f, --foreground do in watchdog?
Run in foreground, don't fork.