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...
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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 – Check how long the system has been running – uptime
https://youtube.com/shorts/SgxCEBW2vhw?feature=share Use the following command to check how long the system has been running uptime
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 create a systemd timer to update ip address in ipset from Dynamic DNS
Systemd timers are a feature of the systemd init system on Linux. They are used to schedule and automate the execution of tasks or services at specific times or intervals. Timers are often used for automating periodic maintenance tasks, backups, data synchronization,...