> udevadm [OPTION…] COMMAND [COMMAND OPTION…]

Send control commands or test the device manager.

Commands:
  help                         Show this help
  info [DEVPATH|FILE]          Query sysfs or the udev database
  trigger DEVPATH              Request events from the kernel
  settle                       Wait for pending udev events
  control OPTION               Control the udev daemon
  monitor                      Listen to kernel and udev events
  test DEVPATH                 Test an event run
  test-builtin COMMAND DEVPATH Test a built-in command
  verify [FILE…]               Verify udev rules files
  cat [FILE…]                  Show udev rules files
  wait DEVICE [DEVICE…]        Wait for device or device symlink
  lock COMMAND                 Lock a block device and run a command
  lock --print

Options:
  -h --help                    Show this help
  -V --version                 Show package version
  -d --debug                   Enable debug logging

See the udevadm(8) man page for details.