===== System Level Monitoring and Accounting =====

  * [[http://linux.die.net/man/1/iostat|iostat man page]]
  * [[http://www.cyberciti.biz/tips/howto-log-user-activity-using-process-accounting.html|Process Accounting]]
  * [[http://www.cyberciti.biz/tips/linux-audit-files-to-see-who-made-changes-to-a-file.html|Auditing file changes]]