Virtualization has come a long way in recent years. These days it’s not uncommon to deploy a massive amount of virtual servers on top of a physical server cluster. Virtualization makes the management of system resources and data storage systems a breeze, as in cloud VPS. …

In this article, we’ll deploy ECK Operator using helm to the Kubernetes cluster and build a quick-ready solution for logging using Elasticsearch, Kibana, and Filebeat. What is ECK? Built on the Kubernetes Operator pattern, Elastic Cloud on Kubernetes (ECK) extends the basic Kubernetes orchestration capabilities to support the setup and management of Elasticsearch…

Today, system engineers and developers have the ability to securely manage a Linux server remotely using the console. For Windows, there are special utilities for connecting to Linux servers via SSH, such as Putty. For macOS and Linux users, we can use the ssh-client package built into the OS. …

To ensure the continued operation of the server, it is necessary to develop its support. Server monitoring is an important aspect of server success and is on par with server security and backup access. Monitoring servers in a timely manner allows you to detect and respond to the emergence of…

When setting up our own mail server, we may encounter problems with sent emails being classified as spam. Typically, this can be caused by two reasons: The content of the letter is obviously spammy Incorrectly configured mail server and DNS records We need to be able to write letters correctly…

If you are a beginner and want to know more about Linux System Administrator responsibilities, welcome to this article. Know your distro The system administrator must be well versed in the operating system that he administers. The administrator must understand all the pros and cons of the system used, differences in distributions, interpreters…

This is a story from an ops perspective. Most often, server hacking occurs for several reasons: Vulnerabilities in the used software Misconfigured server configurations Too weak user passwords on the server Human factor (social engineering, keys/tokens leaking, personal motives) Some things could be prevented, for instance, it’s necessary to monitor…

MAC addresses intro We use IP addresses for identifying computers in the network. MAC address is used on the data link level, every MAC address is unique and is set by the manufacturer. …

Today, most of the manufactured processors in one way or another represent a 64-bit architecture. 32-bit processors can address only 232 bits of data, so they couldn’t work with more than 4GB or RAM. But x86–64 processors can handle much more memory. …