Sysadmin

This article will explain a few commonly triggered SpamAssassin filters, and how you can avoid them.

This guide will show you how to automatically update your boot kernel in Gentoo.

This guide will show you how to disable the power, activity, and ethernet LEDs on your Raspberry Pi. This guide includes changes required following a Pi kernel update in August 2022.

HSTS is a security feature, designed to protect sites against certain man in the middle attacks. In this article, we explain the role of HSTS in web security, and how to enable it on your site.

This guide will show you how to fix a Dovecot ‘Address Family Not Supported by Protocol’ error.

Adding an SSL certificate to your Postfix configuration encrypts emails sent from your server. This guide takes you through the process.

NAT Loopback allows servers hosted locally to be accessed using their full domain name. Unfortunately, many ISP-supplied routers block this feature. Here are a few workarounds.

Giving your emails a recognisable sender name is an important step to ensuring your recipient reads your email. This article will show you how to set up your sender name.

If you regularly connect to machine using SSH, entering a password every time can become tedious. Here’s how you can set up a passwordless SSH connection, using a public/private key pair.

Using EFISTUB, it’s possible to boot a UEFI system without a bootloader. Here’s how you can set it up.

Cron and SystemD timers can both be used to set up scheduled tasks on your system. Here’s a comparison of the two options.