David M Williams

David M Williams

David has been computing since 1984 where he instantly gravitated to the family Commodore 64. He completed a Bachelor of Computer Science degree from 1990 to 1992, commencing full-time employment as a systems analyst at the end of that year. David subsequently worked as a UNIX Systems Manager, Asia-Pacific technical specialist for an international software company, Business Analyst, IT Manager, and other roles. David has been the Chief Information Officer for national public companies since 2007, delivering IT knowledge and business acumen, seeking to transform the industries within which he works. David is also involved in the user group community, the Australian Computer Society technical advisory boards, and education.

Monday, 20 August 2007 20:18

Write your own Linux server part two

In part one, we presented a real-world story where a Linux server – or daemon – solved a need for an ISP. The code to achieve this was introduced, and annotated. However, we left the best till now – the actual socket handling itself, plus the rc.d script to start the daemon at boot time and kill it at shutdown.

Monday, 20 August 2007 19:33

Write your own Linux server part one

One of the great strengths of Linux is its multi-faceted network server capabilities, reaching back to its rich UNIX history and the development of TCP/IP on that platform. If you’re a software developer, it’s dead simple to network-enable your own apps too, making them act consistently with other server processes. Here’s how to do it, in two parts.
How can you be sure your network is secure? Before you can patch vulnerabilities you need to discover them. You need to think like a cracker might. You need to hack your own system. This is known as “penetration testing” – a more palatable term to corporations – and the rich tool set of Linux makes it a superb platform for doing this.

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