Linux
freebsd 12.3 / pfsense 2.6 on hyper-v with low throughput
Upgrading pfsense running on hyper-v to version 2.6 might result in a massive performance regression when the VMSwitch has RSC enabled.
Upgrading kernel on Ubuntu (20.04) LTS
Upgrading kernels on LTS releases of ubuntu can easily be done by enabling an LTS enablement stack. This guide will show how and what to consider.
pfsense - access ipmi using ipmitool
Recent versions of pfsense ship with ipmitool. To use it you need to load the kernel module - this guide shows how to do this.
ceph reports "n hosts fail cephadm check"
One of our ceph clusters entered HEALTH_WARN state with reason "1 hosts fail cephadm check". This guide shows a quick tip how to find out more about this issue.
sudo root shell with autocomplete
Switching user using sudo results in a limited shell without command completion. Using the right sudo command omits this limit and provides a fully fledged shell.
Change BIOSGUID in Hyper-V machines
Using templated virtual machines on hyper-v comes with some issues if you need to ensure that each VM has a unique identity. This guide will show how you'll assign a unique identity for linux VMs.
Migrating zabbix from mysql to timescaledb - introduction
Depending on the size of your zabbix environment, you might want to migrate from mysql to timescaledb. This guide will show how this can be done.
Reducing ceph filesystem overhead on virtual systems
Running ceph clusters with cephfs may allocate more disk space than you expect - especially on virtualized environments. This guide might provide a solution for that.
