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How to Disable Sleep on Mac When Closing the Lid

June 27, 2025 Zsolt Agoston
# Disable sleep on macbooks when closing the lid sudo pmset disablesleep 1 # Prevent auto-start of macbooks when opening the lid sudo nvram BootPreference=%01 # Macbook shutdown without a prompt [Option] + click on 'Shutdown' ... Read More
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How to Build an Apache Webserver on Debian, Ubuntu Linux

April 1, 2020
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Before You Begin A minimal installation of Debian or Ubuntu linux is the starting point, with network connectivity. L.A.M.P is an acronym, stands for the building elements of a fully working website:
  • Linux is probably the most stable and ... Read More
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Install Let’s Encrypt SSL for IIS – Step by Step

March 31, 2020
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If you desperately need an SSL certificate signed by a publicly trusted CA, and you want it for free, Let’s Encrypt is certainly an option. They are valid for 3 months, and even though linux boxes are equipped to request ... Read More
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I HAVE LOCKED MYSELF OUT OF REMOTE DESKTOP !!!

March 30, 2020
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I'm sure you have faced a situation at some point when you needed to RDP in to a client machine but without any luck. That is because the computer must have not had the RDP connections enabled. Even though the ... Read More
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One Interface, multiple VLAN IPs on Linux

March 29, 2020
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To make use of a trunk interface connected to our linux box with a single interface we can configure subinterfaces accessing specific VLAN segments, here we will use Debian and RHEL, assigning two subinterfaces, to each, on will use DHCP ... Read More
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They use 192.169.0.0/24 as a LAN subnet !!!

March 28, 2020
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I’ve come across a company this week, while sorting the SSL certificate on their RRAS server I noticed that all of their nodes had 192.169.0.0/24 IP addresses assigned in their network. When I asked them about why they were using ... Read More
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pfSense on the Stick

March 27, 2020
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Recently I came across a situation where a small office needed a direct IPSec tunnel between two offices temporarily, but they only had a router from their ISP which was not configurable, or at least not by them and they ... Read More
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Expanding an LVM volume with a new disk

March 26, 2020
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Time to time we can face the problem that our storage is running out of space on our Linux box. Now what options do we have? We can attach a new storage to the system and mount it in the ... Read More
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CentOS 8 Install in Text Mode

March 25, 2020
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Text Mode Many times it is preferable to run the CentOS linux installer in text mode, avoiding the GUI. For instance when using an older machine with less resources or when deploying a VM when console access might be limited, ... Read More
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Linux Egg Hunter – x86

March 24, 2020
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Another interesting topic. First of all, what is an egghunter? You will encounter a scenario sooner or later when you can use a buffer overflow condition to execute your code on a target, but the memory space for that is ... Read More
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Linux Reverse Shell – x86

March 23, 2020
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Hopefully you have read my post about bind shells that covered a lot of basics which is really important to understand how these codes work. However, compared to bind shells reverse shells tend to be much more popular, because of ... Read More
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Linux Bind Shell – x86

March 23, 2020
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After the long intro, let’s just jump into it! First of all, this set of articles that are dealing with shellcodes written for linux machines running on 32bit CPU architecture (we’ll talk about the differences between 32bit and 64bit architectures ... Read More
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Office365 to Office365 Migration for FREE – Step by Step

March 21, 2020
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These days it’s a common scenario to see a company acquiring another, and having both organizations hosting their email service in the cloud using Office 365. Unfortunately Microsoft doesn’t provide us with easy to use tools - and ways - ... Read More
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