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If you’ve spent any time around UNIX, you’ve no doubt learned to use and appreciate cron, the ubiquitous job scheduler that comes with almost every version of UNIX that exists. Cron is simple and easy to use, and most important, it just works. It sure beats having to remember to run your backups by hand, for example.
But cron does have its limits. Today’s enterprises are larger, more interdependent, and more interconnected than ever before, and cron just hasn’t kept up. These days, virtual servers can spring into existence on demand. There are accounting jobs that have to run after billing jobs have completed, but before the backups run.
Author : Sol Lederman
What Is a Container and How Are Containers Used? A starting point for an exploration of containers and how they’re used is this simple definition: a container is a packaging format for a unit of software that ships together.
A container is a format that encapsulates a set of software and its dependencies, the minimal set of runtime resources the software needs to do its function. A container is a form of virtualization that is similar to a virtual machine (VM) in some ways and different in others. VMs encapsulate functionality in the form of the application platform and its dependencies. The key difference between VMs and containers is that each VM has its own full-sized OS, while containers typically have a more minimal OS.
Author : Greg Bledsoe
“If you build it they will come.” Are freeways built to travel between existing communities, or do communities spring up around freeways? Is this a chicken-and-egg problem, or is there a complex interaction where such things shape each other?
The use of UNIX and Linux security tools raises similar questions. Do people work the way they do because of the tools they have, or do people have the tools they have because of the way they work?
Author: Kyle Rankin
This book explores system administrator fundamentals. These days, DevOps has made even the job title “system administrator” seem a bit archaic, much like the “systems analyst” title it replaced. These DevOps positions are rather different from typical sysadmin jobs in the past in that they have a much larger emphasis on software development far beyond basic shell scripting. As a result, they often are filled with people with software development backgrounds without much prior sys- admin experience. In the past, sysadmins would enter the role at a junior level and be mentored by a senior sysadmin on the team, but in many cases currently, companies go quite a while with cloud outsourcing before their first DevOps hire. As a result, DevOps engineers might be thrust into the role at a junior level with no mentor around apart from search engines and Stack Overflow posts. In this book, I expound on some of the lessons I’ve learned through the years that might be obvious to longtime sysadmins but may be news to someone just coming into this position.
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Most filesystems do not maintain a directory of where the hardlinks to a file (or more precisely, to an indode) are.
So you'll have to scan the whole filesystem to find all hardlinks. You can do this using
find -inum <inode number>
GameServer is a TurnKey GNU/Linux appliance for hosting game servers on Linux. It provides a way of deploying game servers in minutes in cloud environments or local VMs.
Automatic installation of gameservers using LinuxGSM. - GitHub - jesinmat/linux-gameservers:
Tool for automatic installation of game servers. Wrapper for LinuxGSM.
Manage Your Game Server Easily With LinuxGSM
The command-line tool for quick, simple deployment and management of Linux dedicated game servers.