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Verification
DNF is the package manager you get on Fedora, RHEL 8 and later, Rocky Linux, AlmaLinux and Oracle Linux — and the commands below work the same on all of
nameserver: DNS
A nameserver, also called a DNS server, is an essential part of the infrastructure of the internet. It stands for Domain Name System and ensures that people do
kvm: Virtualization
KVM (Virtualization)Kernel-based Virtual Machine, abbreviated to KVM, is a virtual machine monitor (VMM) integrated into the Linux kernel. It allows Linux to
How does the internet work?
How does the internet work?
The internet is a worldwide network of interconnected computers, servers, and devices that exchange data through standardized
pip (Python)
pip (Python)
pip is a tool for installing and managing Python packages. It is the standard package manager within the Python programming language and is
ES Modules: What You Gain, and What You Pay For
The topic ES Modules does not appear in the supplied source material.None of the sources deals with ES Modules, JavaScript, ECMAScript, modular programming in
iptables: Building a Firewall on Linux
iptables: Building a Firewall on Linux
A packet arrives on eth0, and the kernel has to decide — accept, drop, or forward it somewhere else. That decision is
What you're actually choosing
You run a handful of services at home. A media server, a reverse proxy, maybe a database you don't want on your laptop. At some point you stop installing
pip on Python: Installing, Pinning and Cleaning Up Packages
pip on Python: Installing, Pinning and Cleaning Up Packages
`pip --version` is the first command you run on a fresh Python install, and what it prints decides
Docker Images: Inspect, Save, Load, Import and Registry Management
Docker Images: Inspect, Save, Load, Import and Registry Management
This walks you through the Docker image and registry commands you actually use day to day —
homebrew: macOS
Homebrew – The Package Manager for macOS (and Linux)
Homebrew is an open source package manager designed for macOS and Linux. It is a powerful tool that
The Certificate Is Not the Hard Part
The Certificate Is Not the Hard Part
`openssl req -x509 -newkey rsa:4096 -keyout key.pem -out cert.pem -days 365 -nodes`That one line produces a working TLS