Tutorials Point

  Unix for Beginners
  Unix Shell Programming
  Advanced Unix
  Unix Useful References
  Unix Useful Resources
  Selected Reading

Copyright © 2014 by tutorialspoint

  Home     References     Discussion Forums     About TP  

amtu - Unix, Linux Command

previous next AddThis Social Bookmark Button



amtu - Abstract Machine Test Utility (AMTU)


amtu [-dmsinph]


Abstract Machine Test Utility (AMTU) is an administrative utility that checks whether the underlying protection mechanisms of the hardware are being enforced. These checks are a requirement of the Controlled Access Protection Profile (CAPP) FPT_AMT.1 (see http://www.radium.ncsc.mil/tpep/library/protection_profiles/CAPP-1.d.pdf).

AMTU executes the following tests:

* Memory
  Randomly writes to areas of memory, then reads the memory back to ensure the values written remain unchanged.

* Memory Separation
  Ensures that user space programs cannot read and write to areas of memory utilized by items such as Video RAM and kernel code.

* I/O Controller - Network
  Verifies random data transmitted is also the data received for each configured network device. Checks only Ethernet and token ring devices that are configured and up. Does not check async devices.

* I/O Controller - Disk
  Verifies random data written to disks remains unchanged. Only IDE and SCI controllers that are associated with mounted file systems are checked. Disk controllers with read-only mounted file systems are not checked.

* Supervisor Mode Instructions
  Ensures that the enforcement of the property that privileged instructions should only be in supervisor mode is still in effect. The set of privileged instructions tested to confirm this is architecture dependent.


Options available for the amtu command are the following:

-d Print debug messages.

-m Execute Memory Test.

-s Execute Memory Separation Test.

-i Execute I/O Controller - Disk Test.

-n Execute I/O Controller - Network Test

-p Execute Supervisor Mode Instructions Test.

-h Print help message.


The amtu command issues the following return codes when executed:

-1 Failure

0 Success.


Report bugs to amtu-discuss@www-124.ibm.com


Emily Ratliff, Joy Latten, and Kimberly Simon.

previous next Printer Friendly