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.
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.
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.
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.
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.
If you're working with azure you're propably also working with AzureCli. This article shows how to get usable command completion on your client.
Having upgraded docker you may come into a situation where the docker daemon itself doesn't start anymore because of an issue with firewalld.
Containers are no virtual machines - yet we might want to treat hosts running container workloads like hypervisors and apply limitations on container networking. This guide describes a way to limit container networking on docker based container hosts using firewalld.