5 Ways to Test TCP and UDP Ports in Linux Using nc, nmap, ss, and Bash
Telnet is missing from almost every modern Linux install, but you can still test TCP or…
20 Linux Networking Interview Questions and Answers for 2026
You’ve probably memorized networking definitions like “What is DNS?” or “What is a subnet?” for interviews….
How to Use the watch Command in Linux to Monitor Commands in Real Time
You’ve probably run df -h, waited a few seconds, and run it again while a file…
How to Monitor Commands Executed by Linux Users in Real Time
Checking .bash_history after the fact, it only shows the commands a user typed, and that’s only…
15 Bash (!) Operator Examples Every Linux User Should Know
Most Linux users come across the ! symbol in only two situations: when they learn the…
9 Deprecated Linux Networking Commands and Alternative Tools You Should Use
Linux provides tons of command line utilities that Linux administrators learned years ago are now outdated….
15 Linux Interview Questions and Answers for System Administrators
Most Linux interview lists recycle the same 10 questions from a decade ago, and many of…
TiDB: Build a MySQL-Compatible Distributed SQL Database on Linux
This tutorial shows you how to install TiDB using TiUP, start a local cluster, connect to…
lazygit: Manage Git Repositories from the Linux Terminal
Every command in this guide was tested on Ubuntu 26.04 and RHEL 10. You’ll learn how…
Hister: Search Local Files Instantly in Linux
Hister is a self-hosted search tool that indexes your local files and browser history, so you…
11 Best IP Address Management (IPAM) Tools for Linux in 2026
Most sysadmins don’t realize there’s an IP conflict until something goes offline. That’s where IP address…
agentOS: Run AI Agents in a Secure Linux Sandbox
I burned through half of my E2B sandbox budget in just two weeks by spinning up…
Try uutils-coreutils: Rust Alternative to GNU Coreutils
For years, I never gave GNU coreutils much thought. They’re the standard Linux commands like ls,…
Nushell: A Better Shell for Files, Processes, and JSON
If you’ve ever chained together ls, awk, and grep just to find a file or extract…
How to Downgrade and Lock Packages With dnf in RHEL Systems
You ran dnf update, and now something has stopped working. Instead of spending hours troubleshooting, you…