Evaluate device growth and licensing before upgrading ThingsBoard CE 4.3 to 4.4. Follow the Community Grant and Ubuntu upgrade process, or keep using Apache-licensed CE 4.3.
Trace a Zabbix database socket error after unattended-upgrade to a blocked service restart. Follow the recovery steps and systemd timeout configuration for the Ubuntu 26.04, Zabbix 7.4, and MariaDB 11.8 setup.
In a previous post, I showed how to set up KVM and Cockpit on Ubuntu 24.04. That setup works well
…and switch from Ubuntu’s apt cephadm (v19) to a manually downloaded cephadm (v20) This post documents a practical, works-in-real-life upgrade
Short outage method: Stop → Backup → Upgrade → Start Example upgrade: 26.4.6 → 26.5.2 This post upgrades a Keycloak
This post shows how to move a single-node Vault OSS deployment from one EC2 instance to another existing EC2 host
This is the reverse of my previous migration (VMware Workstation → KVM). The safe, repeatable flow is: Shutdown the VM
This post migrates Backstage backend monitoring from kube-prometheus-stack (ServiceMonitor + Prometheus scrape) to an LGTM-style push pipeline: Backstage (OpenTelemetry SDK)
This post shows how to upgrade a 3-node kubeadm cluster from Kubernetes v1.34.x → v1.35.0 on Ubuntu Server 24.04, where:
This post upgrades the previous single-PC WireGuard client setup into a site-to-site VPN: Follow-up to: Architecture What changes vs “single
