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Introduction to Linux - A Hands on Guide
This guide was created as an overview of the Linux Operating System, geared toward new users as an exploration tour and getting started guide, with exercises at the end of each chapter.
For more advanced trainees it can be a desktop reference, and a collection of the base knowledge needed to proceed with system and network administration. This book contains many real life examples derived from the author's experience as a Linux system and network administrator, trainer and consultant. They hope these examples will help you to get a better understanding of the Linux system and that you feel encouraged to try out things on your own.
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While I should keep the company I worked for a secret out of respect; it was a major retail chain in the US with about 7000 locations at the time.
The year was 2007. I had only been working for 2 years in my career, and I had already advanced to the infrastructure team. At that time we were still using SCO Unix 5.0.5 or 5.0.7 on all of the servers at each location.
Out of the normal chaos, a semi-urgent request came. Apparently there were certain server models that...
One of the many neat things you can do in Linux is to create a "virtual disk" (which is really just a file), and you can add other files to it. We use this at work to store an xml file into a virtual disk that are xen virtual machines use when booting to configure themselves. But you could also use this as a way
to more-or-less hide files.
So first: Create the virtual disk (The exmaple creates a 10MB disk) :
`dd if=/dev/zero of=/root/name_of_virtual_disk...