acpi_available command in Linux with examples

acpi_available is a command in Linux which test whether ACPI (Advanced Configuration and Power Interface) subsystem is available or not. It has three return statuses:

  • 0 : It means ACPI subsystem is available.
  • 1 : It means ACPI subsystem is not available.
  • 2 : It means some usage error has occured.


$ acpi_available

Example 1: Here, echo $? is a command which is used to see the last return status.

Example 2: Here, we create a false error and then displayed return status.


  • info acpi_available : It displays help information.


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