Tags: sys admin

Introduction to Modern Network Load Balancing and Proxying

It was brought to my attention recently that there is a dearth of introductory educational material available about modern network load balancing and proxying. I thought to myself: How can this be? Load balancing is one of the core concepts required for building reliable distributed systems. Surely...
Read 0 Comments

“DevOps Is a Management Problem”

Improving your own organization’s performance – from where they are now to performance levels equal to the industry leaders – seems like a very long and difficult road. What is missing in most organizations? We talked to Damon Edwards, co-founder and managing partner of DTO Solutions and DevOpsCon ...
Read 0 Comments

Manage Disk Image Files Wisely in the Face of DevOps Sprawl

There are strategies to prevent obsolete disk images from clogging up valuable space, especially in a rapid-change DevOps shop. However, not all VMs will benefit from the same plan. Disk images are fast and easy to create, but they're not free and they cause administrative problems. Each image file...
Read 0 Comments

Mitigating dirtyc0w with systemd

Basic mitigation Known exploits for the CVE-2016–5195 vulnerability involve the madvise syscall, so it’s possible to mitigate by excluding the necessary call via a systemd service or container configuration. This is easy with for a systemd unit: [Service] SystemCallFilter=~madviseThe tilde after...
Read 0 Comments

What We Know About Friday’s Massive East Coast Internet Outage

This morning’s attack started around 7am and was aimed at Dyn, an Internet infrastructure company headquartered in New Hampshire. That first bout was resolved after about two hours; a second attack began just before noon. In both cases, traffic to Dyn’s Internet directory servers on the East Coast...
Read 0 Comments

Docker Networking Fundamentals

Each Docker container has its own network stack. This is due to the Linux kernel NET namespace, where a new NET namespace for each container is instantiated and cannot be seen from outside the container or from other containers. Docker networking is powered by the following network components and...
Read 0 Comments

projects.png

Google projects
Google contributes a slew of useful open source tools and programs to the community each year.

Google’s Open Source Report Card Highlights Game-Changing Contributions

Ask people about Google’s relationship to open source, and many of them will point to Android and Chrome OS — both very successful operating systems and both based on Linux. Android, in particular, remains one of the biggest home runs in open source history. But, as Josh Simmons from Google’s Open...
Read 0 Comments

ainissa-ramirez.png

Ainissa Ramirez
The greatest cultural shifts come from new technologies, said Dr. Ainissa Ramirez in her LinuxCon North America keynote.

Technology Changes Us, Changes Society, and Changes Governments

We shape our technology. Our technology shapes us. It's not a one-way trip, but a continual feedback loop. Dr. Ainissa Ramirez, in her inspirational LinuxCon North America keynote, claims that the greatest cultural shifts come from new technologies. Dr. Ramirez says, "Technology is a faster mover...
Read 0 Comments

Humanity’s War on Latency: Semaphore to Silicon Photonics and Beyond

For most of humanity's existence, communication has been incredibly slow. For millennia the only way of transmitting information between two humans was via speech or crude drawings. About 5,000 years ago written language and papyrus increased the transmission distance and bandwidth of human-human...
Read 0 Comments

Linux Foundation Certified Engineer: Karthikeyan Ramaswamy

The Linux Foundation offers many resources for developers, users, and administrators of Linux systems. One of the most important offerings is its Linux Certification Program, which is designed to give you a way to differentiate yourself in a job market that's hungry for your skills. lfce-...
Read 0 Comments

Pages

Click Here!