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Relax

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Relax and Recover (ReaR) generates an appropriate rescue image from a running system and also acts as a migration tool.

Defying the Danger

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The Heartbleed bug shocked the security community and seriously damaged the reputation of OpenSSL. Luckily, alternatives such as LibreSSL, PolarSSL, and GnuTLS are waiting in the wings.

Puppet or Chef?

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Puppet and Chef are competing open source tools for configuration management. Which tool is right for your network? Read on for some pros and cons.

Data Tender

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The Sheepdog distributed storage tool exhibits pronounced doggedness and deserves appropriate attention, benefiting projects such as QEMU and OpenStack.

Core Technology

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The /proc filesystem facilitates the exchange of current data between the system and user. To access the data, you simply read and write to a file. This mechanism is the first step for understanding kernel programming. ü

Shared storage systems GlusterFS and Ceph compared

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Many shared storage solutions are currently vying for users’ favor; however, Ceph and GlusterFS generate the most press. We compare the two competitors and reveal the strengths and weaknesses of each solution.

Relaxed in the Zoo

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Anyone who manages many clusters should be meticulous in ensuring that organized processes prevail in the distributed server zoo. We describe how Apache ZooKeeper fulfills this task.

Keeping Secrets

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SSL and TLS are very complex technologies. If you want to avoid wading through cryptography manuals to harden your HTTPS web server, read on for practical recommendations on establishing, securing, and optimizing your SSL/TLS configuration.

Protect your Network with Port Knocking

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To ensure that the data on your computers remains accessible only by you and those with whom you want to share, we look at the advantages of combining TCP Wrappers and port knocking.

Free and Active

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You don't have to spend a lot of money on expensive tools to read reports and analyze data on your Active Directory network. We show you some free utilities that will help you keep up with your Active Directory.

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