Adding NVMe L2ARC and SILOG to ZFS
L2ARC and SILOG are the best was to get performance from a ZFS filesystem. This will show how to add in two NVMe drives and use them as your L2ARC […]
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General Unix Articles
Network Bandwidth Testing with Iperf3
Introduction This document provides instructions for performing network bandwidth tests using iperf3 on FreeBSD or Linux systems with 1Gbps interfaces. iperf3 is a powerful tool for measuring network performance, including
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Disabling TLS 1.0 and 1.1 in Postfix
Postfix is one of the most common email servers in the world due to it’s performance, easy setup and configuration. Postfix supports TLS 1.2 as of version 2.6 and TLS
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Disabling TLS 1.0 and 1.1 in Dovecot
If you have users accessing mail on your system, then you probably have Dovecot running. It is one of the best POP and IMAP servers (IMHO). It is easy to
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Checking the Raspberry Pi CPU or GPU Temperature
The Raspberry Pi has a few temperature sensors built in. One of the most important is in the GPU. This is because the Raspberry Pi will start throttling back it’s
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Clear Systemd Journal Logs
Is your system running out of disk space and you don’t know where it all went. It might be systemd. Systemd creates Journal Logs that can add up quickly. Here
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FreeBSD Upgrades with ZFS boot environments
FreeBSD has always been my OS of choice but in the past I have always viewed upgrades as one point of failure. What if the upgrade doesn’t go as expected,
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Apache: Different authentication requirements
I have a web application running on Apache 2.4 that I would like to be password protected for everyone except for my local network. If someone access it from my
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MySQL: Working with Date Ranges
At times we have to collect the last 7 or 15 days of data from MySQL. For example to create graphs or stats for the past x amount of days or
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VMware: Enable Change Block Tracking (CBT)
Change block tracking allow tools to track what blocks in a virtual drive have changed over a period of time. This is very useful for backup software as it is
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