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How to set up SSH on Raspberry Pi

Updated 16th August 2022

In this post, I am going to show you how to set up SSH on a Raspberry Pi. Step 1: Raspberry Pi config menu First, open a new terminal and execute the command below to open the Raspberry Pi config menu. sudo rasps-config  Select “Interfacing Options” and press ENTER. Then select “SSH” and press ENTER. 

How to transform geometries with PostGIS

Updated 2nd October 2023

PostGIS is a power extention for PostgreSQL databases. It provides a suite of tools to handle and manipulate geographic data. At times, you may need to transform geometries with PostGIS for different base maps or to perform more accurate calculations, such as calculating the area of a polygon. Transform geometry with PostGIS PostGIS has a

IPtables – How to block and unblock IP Addresses in Linux

Updated 14th December 2023

Not long ago, I noticed some strange activity on a server I manage. The server, running Ubuntu 22.04, was receiving high volumes of traffic from a single IP Address. After some investigation, I decided the activity resembled that of web scrapping, so I decided to block the IP Address. Iptables or ufw I hear you