A few weeks ago, I aquired a Dell Poweredge R720 server on Marketplace. It was a very good deal, with dual 8 core / 16 thread Intel Xeon processor (total 16c 32t), 192GB DDR3 ECC RAM and 2 512GB SATA SSDs. I needed this server to run nested VMs in a KVM hypervisor for Cisco… Continue reading Enabling nested virtualization in RHEL 9
Author: jfcourteau
A real world “bit flip” case
We often say in IT that it either works or not. That it’s “1” or “0”. In the past few days, I encountered this “once in a lifetime” case, where a wierd application problem had to be drilled down to the binary level to be diagnosed and solved. How lucky am I? Cisco ACI IP… Continue reading A real world “bit flip” case
Making clamd work with Exim on Red Hat
In the last few months, I upgraded my personal server from CentOS 7 to Red Hat Enterprise Linux 8 (with a free developper account). I have many services running on it, and one of them is my email server composed of 4 pieces of software: Dovecot, Exim, SpamAssassin and Clamav (clamd). I have had a… Continue reading Making clamd work with Exim on Red Hat
VLAN trunks on RHEL 8
Last week, I had to configure a new KVM hypervisor running on a Red Hat Enterprise Linux 8.5 server that would host VMs from multiple VLANs/subnets. This type of configuration is pretty easy to do in VMWare ESX, having a virtual switch trunked to the physical world. But in RHEL-based distributions, if you want to… Continue reading VLAN trunks on RHEL 8
Welcome to my IT blog
My name is Jeff Courteau, and I’ve been in IT for more than 20 years. Back in 1999, I was desiging websites, and started studying in IT at Multihexa College in Quebec City. At first, I had no interest in networking, but I quickly realized I couldn’t do without it. My passion was born! Overs… Continue reading Welcome to my IT blog