Linux

Why Broadband Service Provider Technical Teams Should Be Using Linux in 2026

The CellStream Blog / By

Views: 2,341Originally published August 7, 2018 | Updated October 2026 Several years ago, during a video call with a service provider technical lead, I noticed something interesting. Almost every question I answered, whether it concerned Wi-Fi, network testing, troubleshooting, or packet analysis, involved demonstrating something on my Linux laptop. Eventually, the technical lead asked why

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How to Identify Your Computer’s Hardware Components

Networking and Computing Tips and Tricks / By

Views: 2,821Have you ever wondered exactly what hardware is inside your computer? Not just how much memory you have or what processor Windows says you’re running, but the actual manufacturer and model of your motherboard, the type and speed of your RAM, the BIOS or UEFI firmware version, and the details of your graphics processor?

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The Linux ip Command: A Practical Guide to Network Troubleshooting

Networking and Computing Tips and Tricks / By

Views: 7,523Originally published October 26, 2018 | Updated October 2026 If you have spent much time working with Linux, you probably remember commands such as ifconfig, route, and arp. For years, these utilities were commonly used to examine network interfaces, IP addressing, routing tables, and other networking information. Those commands may still be available on

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sngrep: The SIP Troubleshooting Tool You Should Know

Networking and Computing Tips and Tricks / By

Views: 768If you work with VoIP, and more specifically SIP long enough, eventually you find yourself staring at an INVITE, a handful of provisional responses, several IP addresses, a 200 OK, an ACK, and perhaps a BYE—and trying to mentally reconstruct what actually happened. Wireshark can certainly do this. In fact, Wireshark remains one of

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Why Broadband Technicians and Network Engineers Should Install WSL

The CellStream Blog / By

Views: 645If you work in broadband or networking and use a Windows laptop, you probably already have a pretty capable troubleshooting platform. Windows gives you tools such as ping, tracert, nslookup, PowerShell, SSH, and a growing collection of useful networking commands. Add Wireshark, Nmap, and a few other utilities and you can do quite a

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How to Set a WLAN Frequency or Channel in Linux for Wireshark Packet Capture

Networking and Computing Tips and Tricks / By

Views: 2,856Learning how to manually control Wi-Fi channels in Linux is a foundational skill for wireless troubleshooting and packet analysis. Proper channel selection is critical because Wi-Fi troubleshooting is highly dependent on capturing the correct RF environment at the correct moment in time. When combined with Wireshark, Linux monitor mode provides one of the most

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IPv6 Linux Command Line Examples

Networking and Computing Tips and Tricks / By

Views: 4,355 Check out these additional IPv6 Resources Our IPv6 overview course at Udemy Our IPv6 Custom Profiles for Wireshark Our IPv6 classes at the Online School OK folks, based on some feedback from Reddit, I decided to update this post from 2013. Modern Linux distributions have largely deprecated the legacy net-tools suite (which included

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A Better Linux Resource Monitor

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Views: 2,973What is btop? btop (aka btop++) is a modern and visually appealing resource monitoring tool for Linux and other operating systems. It is part of the bpytop family, created by the same developer, and is written in C++ for performance and efficiency. Like htop, btop provides detailed information about system resources, including CPU, memory,

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What is the ‘nslookup’ command, and how can I use it?

Networking and Computing Tips and Tricks / By

Views: 8,104The nslookup command is a built-in network administration tool available on Windows, macOS, and many Linux distributions. It is used to query DNS servers to retrieve information about domain names, IP addresses, and DNS records. Basic Syntax: nslookup [hostname] [DNS server] Components: Common Use Cases: Example Output: Query a Domain: nslookup example.com Output: Server:

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What is the ‘dig’ command, and how can I use it?

Networking and Computing Tips and Tricks / By

Views: 14,636The dig command, short for “Domain Information Groper,” in Linux or MacOS is a command-line tool used to query Domain Name System (DNS) servers. The command is a lot like nslookup, but at the same time it is different. If you are a Windows user, you have to use nslookup. For a reference on

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A Simple Linux Firewall – ufw

Networking and Computing Tips and Tricks / By

Views: 3,730Configuring a firewall rule in Ubuntu typically involves using iptables or nftables. I have written a separate article on iptables here. What if we wanted to make life a little less involved. The answer is ufw (Uncomplicated Firewall), which is a user-friendly front-end for managing iptables firewall rules. Here’s how you can do it:

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How to Configure iptables in Linux

Networking and Computing Tips and Tricks / By

Views: 4,330 iptables is a command-line utility in Linux that allows you to configure the rules of the packet filtering and NAT (Network Address Translation) framework, known as netfilter, within the Linux kernel. It is a key tool for managing network traffic and implementing a firewall on Linux systems. Here’s an overview of what iptables

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Our Windows (and Linux) Networking Toolkits

Networking and Computing Tips and Tricks / By

Views: 4,239Well folks, I have decided to make this toolkit available to all. Just download it here. The Linux bash version can be downloaded here. Yes, Windows offers several built-in tools and utilities that can help with networking tasks and commands. Here’s an overview of some of the most useful tools: The problem is these

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