When you deploy a new Ubuntu server — whether on Google Cloud, AWS, or any other platform — it’s essential to harden it immediately.This minimizes attack surfaces and protects your system from unauthorized access. Here’s a complete guide to basic, essential...
If you want a remote desktop accessible directly from your browser, Apache Guacamole is the perfect lightweight solution.This guide shows you, step-by-step, how to deploy Guacamole on a Google Cloud Platform (GCP) virtual machine. Step 1: Prepare Your GCP Project...
Exploring a POP3 Server Over Port 110 Using the Terminal Once you have a connection to a POP3 server over Port 110, you can do a lot more than just check if the port is open — you can actually explore the server, see what mail software („mailer“)...
If you’ve installed full Xcode from the Mac App Store but Homebrew still fails when building packages like telnet, the problem is usually that macOS is still pointing to the lightweight Command Line Tools instead of full Xcode. Here’s how to fix it: Step 1 —...
runc is: A tiny but critical tool for containers. It’s a command-line utility that can create and run containers according to the Open Container Initiative (OCI) spec. It’s actually what Docker (and many other container systems) use under the hood to start and manage...
Running Docker on VMware / vSphere (VSX, etc.) in your own datacenter: Still depends on your hardware (if the server dies, the VM dies, containers die). Still depends on your VMware infrastructure (and VMware itself can crash or have bugs). You add another layer of...
Why you wouldn’t run hundreds of containers directly on bare metal: Single point of failure → if the kernel or hardware dies, everything dies. Kernel risk → one bad kernel update could wipe out hundreds of containers at once. Hard to isolate performance issues →...
Short version: LXC and Docker containers share the host’s kernel. They don’t have their own separate kernel inside the container. So: if the host’s kernel changes (upgrade, patch, bug, security fix) → it immediately affects all containers running on...
Nice one — here’s the simple version: Control groups (cgroups) = control „how much“ resources a process can use (CPU, memory, disk I/O, network, etc.). Example: „This container can only use 1 CPU and 512MB RAM.“ Namespaces = control...
Good question! Here’s the main difference between LXC and Xen: LXC (Linux Containers) uses operating system-level virtualization. It shares the same Linux kernel between all containers. Containers are isolated from each other, but they’re all running on the same...
