[SOLVED] The following signatures were invalid: EXPKEYSIG B188E2B695BD4743 DEB.SURY.ORG Automatic Signing Key

Here is the solution if you've got the following error message when updating package lists on Debian (apt-get update): The following signatures were invalid: EXPKEYSIG B188E2B695BD4743 DEB.SURY.ORG Automatic Signing Key The sury.org Debian package repository has changed its package signing key. To fix the error, just download the new key: apt-key adv --fetch-keys https://packages.sury.org/php/apt.gpg Finally, ... Read more

PHP-FPM: php_value vs. php_admin_value directives explained

php_value vs. php_admin_value

php_admin_value and php_value are directives used in PHP-FPM (FastCGI Process Manager) configuration, often seen in context with web server setups like Apache or Nginx. They are used to set values for PHP's configuration directives e.g. in a PHP-FPM pool file or in the Apache server configuration. This is an alternative to changing PHP settings in ... Read more

How to Create NIC Teaming with PowerShell

NIC Teaming with PowerShell

As a Windows System administrator, you likely appreciate the efficiency of using Windows PowerShell to automate system administration tasks in Windows Server. This guide will show you how to create NIC Teaming using PowerShell. Understanding NIC Teaming NIC Teaming, also referred to as Load Balancing/Failover (LBFO), is a feature in Windows Server that enables you ... Read more

PowerShell: How to Create an AD User in a Specific OU

Creating an Active Directory (AD) user in a specific Organizational Unit (OU) using PowerShell involves several steps. Before proceeding, ensure you have the appropriate permissions to create users in Active Directory and that the Active Directory module for Windows PowerShell is installed and imported into your PowerShell session. Import the Active Directory Module First, open ... Read more

Postfix Submission vs. Submissions (SMTPS) port

Postfix submission vs submissions port

In Postfix configuration, particularly on Debian and Ubuntu systems, you might come across terms like "submission" and "submissions" when looking into the Postfix /etc/postfix/master.cf file. This article explains the differences and use cases for both ports. Postfix Submission Port 587 This is the standard port for email submission as defined by the Internet Message Access ... Read more

How to enable port 587 (submission) in postfix

Postfix Port 587

pSome internet access providers have port 25 disabled in their routers to prevent spam. If you run your own email server in a data center, you might have to enable the submission port (587) in postfix to be able to send emails from your local email client to your own mail server. Enable Submission Port ... Read more

How to Copy and Paste on PowerShell in Windows

PowerShell Copy & Paste function

We all know how to perform simple copy-and-paste operations in a text editor or in Windows search bars. However, most users wonder how to use these commands in PowerShell because the keyboard shortcuts of these commands are disabled by default in PowerShell. This article'll explain how to enable and use the copy and paste functions ... Read more