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Charles Hartmann

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Payhip Pricing for Creators: When to Upgrade from Free to Plus
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Payhip Pricing for Creators: When to Upgrade from Free to Plus

#payhip #ebooks #selfpublishing #creators
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2 min read

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NUT shutdown on a timer: upssched, secondaries first, and HOSTSYNC explained
charleshartmann profile

NUT shutdown on a timer: upssched, secondaries first, and HOSTSYNC explained

#homelab #linux #proxmox #sysadmin
Comments
5 min read
Gradle convention plugins for a multi-module Android app: build-logic, AGP 9 and the version catalog
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Gradle convention plugins for a multi-module Android app: build-logic, AGP 9 and the version catalog

#android #kotlin #gradle #architecture
Comments
5 min read
Troubleshooting a Linux server in a fixed order: running, listening, reachable, logs, changes
charleshartmann profile

Troubleshooting a Linux server in a fixed order: running, listening, reachable, logs, changes

#linux #devops #sysadmin #homelab
Comments
5 min read
Android reminders that actually fire: exact alarms, SCHEDULE_EXACT_ALARM and rescheduling after reboot
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Android reminders that actually fire: exact alarms, SCHEDULE_EXACT_ALARM and rescheduling after reboot

#android #kotlin #mobile #notifications
Comments 1
5 min read
Frigate recording retention: continuous, motion and alerts, and how big a disk you need
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Frigate recording retention: continuous, motion and alerts, and how big a disk you need

#homelab #selfhosted #security #docker
Comments
5 min read
Will this model fit on your GPU? Size a local LLM on paper before you pull it
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Will this model fit on your GPU? Size a local LLM on paper before you pull it

#ai #llm #homelab #selfhosted
Comments
6 min read
Your fingerprint prompt is a speed bump, not a lock: Android biometrics with a CryptoObject
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Your fingerprint prompt is a speed bump, not a lock: Android biometrics with a CryptoObject

#android #security #kotlin #mobile
Comments
5 min read
Proxmox VE 9 high availability: HA rules, fencing and a failover you have actually tested
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Proxmox VE 9 high availability: HA rules, fencing and a failover you have actually tested

#proxmox #homelab #selfhosted #linux
Comments
7 min read
Test your Compose ViewModels in milliseconds: fakes, runTest, the Main dispatcher and Turbine
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Test your Compose ViewModels in milliseconds: fakes, runTest, the Main dispatcher and Turbine

#android #kotlin #testing #jetpackcompose
Comments
5 min read
Real HTTPS for your homelab Kubernetes apps without opening a port: k3s Traefik, cert-manager and a DNS-01 wildcard
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Real HTTPS for your homelab Kubernetes apps without opening a port: k3s Traefik, cert-manager and a DNS-01 wildcard

#kubernetes #homelab #devops #selfhosted
Comments
6 min read
Your app starts slow after every update: generate a Baseline Profile and prove it is applied
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Your app starts slow after every update: generate a Baseline Profile and prove it is applied

#android #kotlin #performance #jetpackcompose
1
Comments
5 min read
Snapshots on a schedule, replicas on another box: sanoid and syncoid pull replication for ZFS
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Snapshots on a schedule, replicas on another box: sanoid and syncoid pull replication for ZFS

#zfs #homelab #selfhosted #linux
Comments
6 min read
Build a Proxmox cloud-init template from the official Debian 13 image (and clone VMs that configure themselves)
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Build a Proxmox cloud-init template from the official Debian 13 image (and clone VMs that configure themselves)

#proxmox #homelab #linux #devops
Comments
4 min read
Promtail is end of life: ship your homelab's logs to Loki with Grafana Alloy instead
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Promtail is end of life: ship your homelab's logs to Loki with Grafana Alloy instead

#homelab #grafana #selfhosted #devops
Comments
4 min read
Why your 2-node Proxmox cluster freezes (and the QDevice fix that is not a third server)
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Why your 2-node Proxmox cluster freezes (and the QDevice fix that is not a third server)

#proxmox #homelab #sysadmin #linux
Comments
5 min read
Podcast, episode 1: The green check lies — backups, networking, self-hosting and a turtle
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Podcast, episode 1: The green check lies — backups, networking, self-hosting and a turtle

#homelab #podcast #proxmox #selfhosted
Comments
2 min read
Your ufw rules don't cover your Docker ports (and the log-rotation setting to make before your first container)
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Your ufw rules don't cover your Docker ports (and the log-rotation setting to make before your first container)

#docker #selfhosted #homelab #security
Comments
3 min read
MediaPipe LLM Inference is maintenance-only: start on LiteRT-LM (and add this ABI check)
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MediaPipe LLM Inference is maintenance-only: start on LiteRT-LM (and add this ABI check)

#android #kotlin #llm #machinelearning
Comments
5 min read
Ten quick edits should not queue ten syncs: unique work in WorkManager, done right
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Ten quick edits should not queue ten syncs: unique work in WorkManager, done right

#android #kotlin #workmanager #mobile
1
Comments 5
5 min read
Is Jellyfin really using your GPU? A six-rung ladder to prove it on Proxmox
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Is Jellyfin really using your GPU? A six-rung ladder to prove it on Proxmox

#jellyfin #proxmox #homelab #selfhosted
Comments
5 min read
Play Billing in 2026: the purchase isn't done when launchBillingFlow returns
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Play Billing in 2026: the purchase isn't done when launchBillingFlow returns

#android #kotlin #googleplay #billing
Comments
5 min read
Pawdub: a pet translator app that refuses to pretend it translates (Android, on-device)
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Pawdub: a pet translator app that refuses to pretend it translates (Android, on-device)

#showdev #android #ai #mobile
Comments
3 min read
Your app has native code even if you never wrote C++: the 16 KB page size check in 4 commands
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Your app has native code even if you never wrote C++: the 16 KB page size check in 4 commands

#android #googleplay #ndk #tutorial
1
Comments 6
5 min read
remember vs rememberSaveable vs ViewModel: which state survives what
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remember vs rememberSaveable vs ViewModel: which state survives what

#android #kotlin #jetpackcompose #tutorial
Comments
5 min read
Google Play's 12-tester rule, read carefully: what "continuously for 14 days" really means
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Google Play's 12-tester rule, read carefully: what "continuously for 14 days" really means

#android #googleplay #beginners #mobile
Comments 1
5 min read
Why your Home Assistant motion light turns off on you (and the Zigbee fix that comes first)
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Why your Home Assistant motion light turns off on you (and the Zigbee fix that comes first)

#homeassistant #zigbee #homelab #automation
Comments
6 min read
IoT VLAN on OPNsense: three firewall rules that don't break casting or Home Assistant
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IoT VLAN on OPNsense: three firewall rules that don't break casting or Home Assistant

#opnsense #homelab #networking #security
1
Comments
8 min read
ESP32-C3 water monitor for a turtle tank: temperature, TDS and clarity, straight into Home Assistant with ESPHome
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ESP32-C3 water monitor for a turtle tank: temperature, TDS and clarity, straight into Home Assistant with ESPHome

#esp32 #homeassistant #iot #diy
Comments 1
9 min read
Your Proxmox backup job probably skips the guests you built after you made it. Here's the 3-2-1 setup that doesn't
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Your Proxmox backup job probably skips the guests you built after you made it. Here's the 3-2-1 setup that doesn't

#proxmox #homelab #selfhosted #devops
Comments
6 min read
Backup, verify, destroy: how I deleted 50 Proxmox guests in one night and could undo any of them
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Backup, verify, destroy: how I deleted 50 Proxmox guests in one night and could undo any of them

#selfhosted #homelab #proxmox #devops
Comments
2 min read
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