Tags: System Administration

Examining Partitions on Linux Systems

Linux systems provide many ways to look at disk partitions. Here's a look at commands you can use to display useful information -- each providing a different format and with a different focus. Linux systems provide many ways to look at disk partitions. In this post, we'll look at a series of...
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5 Things You Should Be Monitoring

Whether you're a developer building websites or internal applications, or an administrator building the infrastructure to back them, your job doesn't stop once they're up and running. Machine failure, releases containing bugs, and growth in usage can all lead to problems that need to be dealt with...
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code of ethics
ACM's Code of Ethics and Professional Conduct offers guidelines to serve as a basis for ethical decision making for computing professionals.

ACM's Code of Ethics Offers Updated Guidelines for Computing Professionals

The Association of Computing Machinery (ACM) has released an update to its Code of Ethics and Professional Conduct geared at computing professionals. The update was done “to address the significant advances in computing technology and the degree [to which] these technologies are integrated into our...
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moving files
Paul Brown continues his Linux filesystem series with a look at moving, copying, renaming, and more.

Linux for Beginners: Moving Things Around

In previous installments of this series, you learned about directories and how permissions to access directories work. Most of what you learned in those articles can be applied to files, except how to make a file executable. So let's deal with that before moving on. No .exe Needed In other...
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Netflix Cloud Security SIRT Releases Diffy: A Differencing Engine for Digital Forensics in the Cloud

The Netflix Security Intelligence and Response Team (SIRT) announces the release of Diffy under an Apache 2.0 license. Diffy is a triage tool to help digital forensics and incident response (DFIR) teams quickly identify compromised hosts on which to focus their response, during a security incident...
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Linux look Command Tutorial for Beginners (with Examples)

Although the Linux find command does a fabulous job for searching on the command line, there may be situations where a dedicated tool may be more convenient. One such case is to find lines in a file that start with a particular word. There exists a command - dubbed look - that does this for you. In...
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DevSecOps: Security Automation in Enterprise DevOps

Another day, another portmanteau. DevSecOps — an expensive target on AdWords — tries to fit security into the DevOps process. It’s kind of silly because of course companies should be factoring security into their development, particularly when much of DevOps is about enterprises releasing...
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ngrep – A Network Packet Analyzer for Linux

Ngrep (network grep) is a simple yet powerful network packet analyzer. It is a grep-like tool applied to the network layer – it matches traffic passing over a network interface. It allows you to specify an extended regular or hexadecimal expression to match against data payloads (the actual...
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We continue our systemd tutorial, with some specific examples showing how you can best leverage systemd timer units.

Systemd Timers: Three Use Cases

In this systemd tutorial series, we have already talked about systemd timer units to some degree, but, before moving on to the sockets, let's look at three examples that illustrate how you can best leverage these units. Simple cron-like behavior This is something I have to do: collect popcon data...
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pdsh Parallel Shell

For HPC, one of the fundamentals is being able to run a command across a number of nodes in a cluster. A parallel shell is a simple but powerful tool that allows you to do so on designated (or all) nodes in the cluster, so you do not have to log in to each node and run the same command. This single...
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