When updating VMWare ESXI 6.7, which runs my homelab, I always get the error “[Errno 28] No space left on device”. But wait… There is enough space on the disk! A quick search on the package name returned several articles addressing the same issue. It is a common issue with VMWare ESXI 6.7. To fix the issue, the package needs to be installed manually. Let’s begin by enabling HTTP Client in ESXI. The first step is pulling the latest version…
To verify if a removable media (e.g. USB, DVD, or ISO) is bootable, you could use file tool on Linux systems. The command file -s /path/to/media reads block special files, such as partitions, and outputs the information. To test this, I inserted RHEL 8.2 Installation ISO as a disk in a VM. The device path is /dev/sr0. Once I verified the disk is accessible, I ran file -s /dev/sr0. The output for RHEL Installation ISO shows the disk as a…
I passed the CISSP exam in April 2021! Such a difficult exam! The exam is nothing like the practice tests you can find available for free or for purchase. Throughout the exam, I felt unprepared; halfway through the exam I felt like I was failing, that I should take mind-notes for my next attempt. To my surprised, I passed at 100 questions at around 110 minutes into the exam. This is how I did it…
I took some training Having recently switched job and the mandate of Working from Home (WFH), I had a lot of time in my hands. I decided to take advantage of the situation by taking training as needed. My current employer provides all its employee Udemy for Business account. We can take any course available in Udemy at no-cost to us. It has been a tool of immense value because it provides mastery level training in many areas of IT…
Collections of links I have found useful during pentesting, CTFs, or red teaming exercise. This is a work in progress and will be updated somewhat frequently.