Tags: System Administration

Monitoring Software: The Market Lines Are Blurry

Who is the market leader in IT monitoring? You won’t find the answer to that question in this article. With a wide range of functionality being offered for multiple audiences, our priority is to provide clarity about who wants what. The New Stack is seeing two contradictory patterns. Many companies...
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syslog
When your system’s logging causes unexpected issues, you need to understand how your logging works and where your logs are saved. Here, we look at rsyslog, a superfast logging daemon.

Remote Logging With Syslog, Part 1: The Basics

A problematic scenario, sometimes caused as a result of an application’s logging misconfiguration, is when the /var/log/messages file fills up, meaning that the /var partition becomes full. Thanks to the very nature of how systems work, there are always times when your system’s logging cause...
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network load
In part two of this tutorial, we show some specific examples of how to use nload with various options to monitor your network.

Monitoring Network Load With nload: Part 2

In the previous article, I provided an introduction to nload, covering some background, installation, and basic usage. Here, I’ll build on that information and show some specific examples of using nload with various options. Runtime Options You can launch nload with a number of options, so let’s...
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The powerful nload tool can really save the day if you need to analyze traffic on your networks in a hurry.

Monitoring Network Load With nload: Part 1

On a continually changing network, it is often difficult to spot issues because of the amount of noise generated by expected network traffic. Even when communications are seemingly quiet, a packet sniffer will display screeds of noisy data. That data might be otherwise unseen broadcast traffic...
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wrestle control of sudo
You’ll find everything you need to wrestle control over sudo in the /etc/sudoers file. Learn more in this system administration tutorial.

How to Wrestle Control of Sudo With Sudoers

Linux depends upon administrative user permission. Without the elevated permission of root, many commands could not be run. For distributions, such as Red Hat, gaining root permissions means changing to the root user with the command su. Other distributions, such as Ubuntu Linux, opt for a...
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Robert Shimp
Robert Shimp of Oracle paints a picture of a fascinating future full of specialized distributed services and devices, in his presentation at LinuxCon North America.

Microservices and Smart Networks Will Save the Internet

Imagine smart cars talking directly to each other so they don't crash. Imagine hooking your smart phone into a giant mesh of phone video streams at a stadium event, so you can watch your event from multiple perspectives. Imagine smart factory devices that manage themselves for better safety and...
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OpenStack cloud
This article compares the community contributions of four of the top open source automation tools used with OpenStack: Ansible, Chef, Juju Charms, and Puppet.

Managing OpenStack with Open Source Tools

To manage an OpenStack cloud infrastructure, you need to manage the configuration of the individual cloud services and the orchestration between them. Because OpenStack is an open source product, other open source tools are a popular choice to install, manage, and run an OpenStack cloud. There are...
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Apache web server
Learn the basics of running the Apache web server in part three of this tutorial series.

Apache on CentOS Linux For Beginners

We learned the basics of running the Apache HTTP server on the Debian/Ubuntu/etc. family of Linux distributions in Apache on Ubuntu Linux For Beginners and Apache on Ubuntu Linux For Beginners: Part 2. Now we're going to tackle CentOS/Fedora/andtherest. It's the same Apache; the differences are...
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Root Cause: How Complex Web Systems Fail

Distributed web-based systems are inherently complex. They’re composed of many moving parts — web servers, databases, load balancers, CDNs, and many more — working together to form an intricate whole. This complexity inevitably leads to failure. Understanding how this failure happens (and how we...
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Apache on Ubuntu
The trick with Apache is knowing which configurations you need, because it has plenty to choose from; Carla Schroder has some tips that can help.

Apache on Ubuntu Linux For Beginners

The Apache HTTP server is a mighty beast that powers the majority of websites. It has evolved into a complex server that slices, dices, dances, and sings. It powers vast hosting centers, and it is also splendid for running small personal sites. The trick with Apache is knowing which configurations...
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