If you are reading this article, you’re probably familiar with syslog, a logging tool that has been around since the 1980s. It is a daemon present in most Linux-based operating systems. By default, syslog (and variants like rsyslog) on Linux systems can be used to forward logs to central syslog servers or monitoring platforms where further analysis can be conducted. That’s useful, but to make the very most of syslog, you also want to be able to analyze log data.

By Des Nnochiri Whether it’s for network and system administration, database management, web services, or other business functions, chances are you’ll need robust servers as part of your IT infrastructure armory. Traditionally, a server running a Linux operating system has been the preferred option for enterprise use. But which Linux distribution (or distro) is the right one for your particular use case?

This post will describe how to manually build a Ubuntu 18.04 Virtual Machine (VM) server using Oracle’s VirtualBox virtualisation software. Being able to build simple, expendable VMs is extremely useful, whether you’re writing software, building websites or just wanting to learn about Linux servers. We need to be able to SSH onto the server from our host machine to make access easier. To gain SSH access we therefore need to forward SSH’s port to our host.

XDP or Express Data Path arises due to the pressing need for high-performance packet processing in the Linux kernel. Several kernel bypass techniques (DPDK being the most prominent one) aim to accelerate network operations by moving packet processing to user space.

This article is a follow up of our previous article where we explain how we deployed a Kubernetes cluster with k3s on a Raspberry Pi cluster.

In order to carry out a demonstration of our smart tool: the Bleemeo agent at the 8th Devoxx France conference planned for the 17th of April, Bleemeo team decided to use the Kubernetes infrastructure and specially the lightweight version of Kubernetes: k3s. We choose to run k3s on a cluster of 3 Raspberry Pi nodes composed of 1 master node and 2 slaves nodes.

Connection tracking (“conntrack”) is a core feature of the Linux kernel’s networking stack. It allows the kernel to keep track of all logical network connections or flows, and thereby identify all of the packets which make up each flow so they can be handled consistently together.

As with any other operating system, security is a prime concern with Linux network hardware. In this article, we’ll be giving some recommendations on how to toughen the security posture of your Linux servers. Screenshots and example syntax relate to systems running Kali Linux, CentOS, RHEL, Ubuntu, and Debian-based Linux distributions.