Linux

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Viewing Users/System Users on Linux

An essential function when administering a Linux system is viewing, configuring and managing users and groups. I cover adding users in this article: https://www.cellstream.com/reference-reading/tipsandtricks/582-using-the-useradd-command-to-create-user-accounts-in-linux That said, viewing users is done using a few simple commands. How To View Users on a Linux System Every user on a Linux system, whether created as an account for

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Using the useradd Command to Create User Accounts in Linux

Like most operating systems, Linux can have multiple user accounts. The system administrator or root account, or users with sudo privileges are responsible for managing these users, as well as managing those accounts. Linux is a multi-user system, which means that more than one person can interact with the same system at the same time. 

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Seven Awesome Linux Terminal Utilities for Everyone

If you are a Linux user, you know how important the Terminal is to your compute world.  Here are Seven Awesome Linux Terminal Utilities for Everyone. Now there are a bunch of different Terminals in Linux, this article is not about that, but I like Tilix the best: sudo apt install tilix Instead, this article

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How do I install / upgrade Wireshark in Ubuntu Linux?

How do I install / upgrade Wireshark in Ubuntu Linux?  First things first – the Wireshark downloads page is here: https://www.wireshark.org/download.html I know I have put the answer to this in other articles over the years (like this one), but I think it is appropriate to answer the question directly and specifically. Installing Wireshark in

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Detecting ECMP in Linux using Paris and Dublin Traceroute

Equal-Cost Multi-Path (ECMP) is a forwarding mechanism for routing packets along multiple paths of equal cost with the goal to achieve almost equally distributed link load sharing. This, of course, significantly impacts a router’s next-hop (path) decision. For further details, look at RFC 2991, “Multipath Issues in Unicast and Multicast Next-Hop Selection,” and RFC 2992,

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Wi-Fi Network Monitoring & Manipulation in Parrot Linux

Check out these great references as well:  Our Wireless custom profile for Wireshark  Our Udemy course on Wireless Packet capture  Our other Wi-Fi related articles Let’s talk about Wi-Fi Network Monitoring & Manipulation in Parrot Linux. If you are doing anything regarding security or penetration testing you know Linux is the only way to go. 

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TLS Decryption in Wireshark Using Key Log Files in Windows, MAC, and Linux

Hi everyone!  Being able to decrypt the encrypted contents of packet captures is very important if you want to troubleshoot anything above Layer 4.  This is even more important today as the network is evolving to QUIC where everything is encrypted. Check out these great references as well:  Our custom profiles repository for Wireshark  Our

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Capturing Wi-Fi WLAN Packets in Wireshark on Linux

Check out these great references as well:   Our Wireless custom profile for Wireshark  Our Udemy course on Wireless Packet capture  Our other Wi-Fi related articles At a recent course I taught in New England, one of the students wanted to capture Wi-Fi packets on their Windows Surface Pro.  Of course, I referred them to my

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