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Image of Operating System Concepts
Image of Advanced Programming in the UNIX Environment, Second Edition (Addison-Wesley Professional Computing Series)
Image of RHCE Red Hat Certified Engineer Linux Study Guide (Exam RH302) (Certification Press)
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RHCSA Preparation - Script to Configure a Simple OpenLDAP Server

If you are preparing for the RHCSA exam, this post should be of interest to you. I provide a Bash script which will fully configure a simple OpenLDAP directory server which you can then use to test that your OpenLDAP client setup is correct.

Accessing TPM Functionality From UEFI Shell - Part 1

This is the first in a series of posts which demonstrate how to access, use and modify TPM 1.2 and TPM 2.0 resources via a series of UEFI shell applications.

UEFI Shell Utility to Display TPM 1.2 Event Log

In this post I provide the source code for a simple UEFI shell utility to display the TCG TPM 1.2 event log.

UEFI Shell Utility to Display TPM TrEE Capabilities

In the post, I present a small UEFI utility for examining TrEE Capabilities from the UEFI shell. TrEE is an EFI protocol which supports a subset of the TCG TPM 2.0 library specification.

The Sunsetting of SHA-1

SHA-1 (Secure hash algorithm) is a 160-bit hash algorithm that is at the heart of many web security protocols such as Secure Sockets Layer (SSL) and Transport Layer Security (TLS) since shortly after it was developed by the NSA (National Security Agency) in 1995. In 2005, a professor in China demonstrated an attack that could be successfully launched against the SHA-1 function, suggesting that the algorithm might not be secure enough for ongoing use. Because of this, NIST immediately recommended federal agencies begin moving away from SHA-1 toward stronger algorithms. In 2011, NIST mandated that many applications in federal agencies