Postfix Configuration: Blocking Spam with Header Checks
Ray Lee (System Analyst) As a mail server administrator, you might encounter situations where spam emails pass through even when they have valid SPF records. One effective way to combat this is by configuring…
Linux
How to Check if Raspberry Pi Operating System is 32-bit or 64-bit
To determine whether your Raspberry Pi is running a 32-bit or 64-bit operating system, you can use various methods. Here are some steps: 1. Using the Command Line (Terminal): Open…
PostgreSQL Time Travel: Upgrading from Version 9.6 to 14
Introduction PostgreSQL is a powerful, open-source relational database management system that continues to evolve with each new release. Upgrading to a newer version of PostgreSQL can provide improved performance, security…
Mastering the Art of Changing Java Versions in Ubuntu: A Comprehensive Guide
To change the default Java version in Ubuntu, you can follow these steps: Check the installed Java versions on your system using the command: 1. Check the installed Java versions…
Can I install iDempiere ERP on Raspberry pi 4 ?
It is possible to install iDempiere ERP on a Raspberry Pi 4. However, it is important to note that the performance of iDempiere on a Raspberry Pi 4 may be…
What is the difference between ufw and iptables?
ufw and iptables are closely related. In Ubuntu, ufw is a front-end interface to iptables that provides simpler commands and options for setting iptables rules and managing the firewall. When…