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Lab setup 2025 – Part 1 – Ubuntu 22.04

https://youtu.be/MEp5uvuoWGQ Labs are great for testing, development and demo. In this tutorial I am going to show you how I setup my lab in 2025. Basic Setup and Configure the Ubuntu Hosted Server (SSH should have been enabled) Key steps Update the Ubuntu Server with...

Ubuntu 22.04 – Check memory usage – free | top

https://youtube.com/shorts/x6N1uD1CSd0?feature=share In Ubuntu (and Linux in general), "free" refers to the amount of unused RAM (Random Access Memory) available on your system, which you can check using the "free" command in the terminal; essentially, it...

Ubuntu 22.04 – Check disk usage – df | du

https://youtube.com/shorts/3KlDF59ABuM?feature=share In Ubuntu, "df" stands for "disk free" and is a command used to display the amount of available disk space on a mounted file system, essentially showing how much free space is currently available on your system.  df...

Ubuntu 22.04 – What is Bash and its config

Bash (Bourne Again SHell) is one of the most commonly used command-line interpreters or shells in Unix-based systems, such as Linux and macOS. It provides an interface for users to interact with the operating system by executing commands, running scripts, and managing...

Ubuntu 22.04 – Add User to Sudoers and Config

Use the usermod or adduser command to add user to sudoers group sudo usermod -aG sudo username or sudo adduser username sudo To remove the need to enter password when issuing sudo (privilege) commands. The file that the configure is saved /etc/sudoers. Use the visudo...

Ubuntu 22.04 – Change hostname – hostnamectl

https://youtube.com/shorts/6gWG9n2Hq8I Command to change Ubuntu hostname through CLI without rebooting hostnamectl set-hostname new-hostname There are other useful options that you can use with hostamectl command If you are a developer than showing the host...

Ubuntu 22.04 – Check Ubuntu current version – lsb_release

https://youtube.com/shorts/OV-0sWpzxJk?feature=share Here are the methods and commands to check ubuntu version 1. Using the lsb_release -a command2. Checking the file /etc/lsb-release or /etc/os-release3. Checking the file /etc/issue4. Using the hostnamctl command 1....

Deploy FMCv 7.4.1 in KVM – Ubuntu 22.04

The Secure Firewall Management Center Virtual (formerly Firepower Management Center Virtual) Appliance brings full firewall functionality to virtualized environments to secure data center traffic and multi-tenant environments. The management center...

How to configure ipset – Ubuntu 22.04

ipset is a utility in Linux used for managing sets of IP addresses, ports, or other IP-related objects. It is a powerful tool that can be used to create and manage lists of IP addresses and related data efficiently. ipset is particularly useful for implementing...

Cron Job

A cron job is a scheduled task or automated job that runs at specified intervals on Unix-like operating systems. The name "cron" comes from the Greek word "chronos," meaning time, and it is a time-based job scheduler in Unix and Unix-like operating systems. Cron jobs...

Install Windows 11 on KVM (Ubuntu 22.04) with software TPM 2.0

To install Windows 11 on KVM you want to make sure that you have swtmp install and in your KVM environment. Like its name suggest is a software that emulates TPM 2.0 in your virtual environment. You can do a quick check by running the following command. swtpm...