Tags: server

CPU Utilization Is Wrong

Everyone uses %CPU to measure performance, but everyone is wrong, says Netflix's Brendan Gregg in his UpSCALE Lightning Talk. CPU utilization is the metric everyone uses to measure a processor's performance. But %CPU is a misleading measure of how busy your processor really is, says Brendan Gregg,...
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Auditing Docker Containers in a DevOps Environment

The handy auditd package can help track down weaknesses in your system before, during, or after an attack. Thanks to the unremitting, ever-present threat of a multitude of attacks to which a Linux system can be subjected, it’s critical to capture important changes and events made by users and...
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The Critical Missing Piece of DevOps…And How to Find It

We’ve probably all heard the DevOps principle “you build it, you run it.” In theory, DevOps makes each team responsible for both the development and operation of its code, giving DevOps teams complete responsibility — and complete visibility and transparency — for the entire value stream, including...
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IPFire
IPFire was designed for users new to firewalling, so it places a premium on user-friendliness.

IPFire: A User-Friendly Linux Firewall Distribution

Securing your network is an incredibly challenging task, one that’s made even more difficult by software that adds yet another layer of complexity on top. And let’s face it, most firewall tools are the stuff of user nightmare. That’s why, when a firewall tool strips away some of that complexity, it...
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It's HTTPS or Bust: How to Secure Your Website

Come July 2018, with the release of Chrome 68, any site not protected with Secure-Socket Layer/Transport Layer Security (SSL/TLS) will be marked with the red-triangle of an insecure site. Unless you secure your site, you can kiss your web traffic goodbye. To secure your website, you must install an...
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time
Learn how to run your own public time server and contribute to an essential public good.

How to Run Your Own Public Time Server on Linux

One of the most important public services is timekeeping, but it doesn't get a lot of attention. Most public time servers are run by volunteers to help meet always-increasing demands. Learn how to run your own public time server and contribute to an essential public good. (See Keep Accurate Time on...
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How to Control Systemd Services on Remote Linux Server

Systemd system and services manager can be controlled using the systemctl command line utility. It enables you to manage systemd locally or on a remote Linux machine over the SSH protocol. In this short article, we will show you how to manage systemd system and service manager on a remote Linux...
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Nethserver
Follow these steps to get started with Nethserver and see if it doesn’t make for an outstanding solution for your small business.

Nethserver: An Ideal Server Platform for Your Small Business

If you run a small business, you might need an in-house operating system to serve as a veritable multi-tool. Many businesses opt for Microsoft Windows Small Business Server. However, if you’re looking to cut costs and work with open source software, you have plenty of choices, each of which can...
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How To Tell If Your Linux Server Has Been Compromised

A server being compromised or hacked for the purpose of this guide is an unauthorized person or bot logging into the server in order to use it for their own, usually negative ends. Disclaimer: If your server has been compromised by a state organization like the NSA or a serious criminal group then...
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The Linux Commands You Should Never Use

Unless, of course, you like killing your machines. Spider-Man's credo is, "With great power comes great responsibility." That’s also a wise attitude for Linux system administrators to adopt. No! Really! Thanks to DevOps and cloud orchestration, a Linux admin can control not merely a single server...
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