Lead Author and Technical Editor Dale Liu, (MCSE Security, CISSP, MCT, IAM/IEM, CCNA) has been working in the computer and networking field for over 20 years. Dale's experience ranges from programming to networking to information security and project management. He currently teaches networking, routing and security classes, while working in the field performing security audits and infrastructure design for medium to large companies. He currently resides in Houston TX with two cats. He enjoys cooking and beer brewing with his girlfriend and live-in editor Amy. Dale wrote chapter 1, "Introduction," chapter 4, "SSH Features," chapter 6, "SSH Client Basics," and chapter 11, "SSH Command Line and Advanced Client Use." Dale also technically edited Chapters 1, 2, 3, 5, 6, 7, 8, 9, 12 and 13.