Regular expressions are by far the most powerful tool for text manipulation and description, and they are well supported under Linux on many applications. Unfortunately, they are not supported at all (to my knowledge) by the most popular search engines because of their complexities. But, can you imagine how precise your search would be if you had the ability to describe the page you are looking for with a regular expression?
Giovanni Organtini (firstname.lastname@example.org) is a professor of Introduction to Computing and Programming for Physicists at the University of Rome. He has used Linux for years, both for fun and at work, where it is used for the simulation of the CMS experiment (cmsdoc.cern.ch) on large farms and as part of a complex data-acquisition system and machine control. Before the birth of his son, Lorenzo, he used to travel, seeking good restaurants and attending concerts and operas.
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In modern computer systems, privacy and security are mandatory. However, connections from the outside over public networks automatically imply risks. One easily available solution to avoid eavesdroppers’ attempts is SSH. But, its wide adoption during the past 21 years has made it a target for attackers, so hardening your system properly is a must.
Additionally, in highly regulated markets, you must comply with specific operational requirements, proving that you conform to standards and even that you have included new mandatory authentication methods, such as two-factor authentication. In this ebook, I discuss SSH and how to configure and manage it to guarantee that your network is safe, your data is secure and that you comply with relevant regulations.Get the Guide