Google Play App Signing: Which Files Do You Actually Keep?
TL;DR: If Play App Signing is enabled (recommended), keep your upload keystore and its credentials. If it’s not enabled, keep […]
Android App
Hands-On DevOps & Homelab Experiments
From Kubernetes and Ceph to Proxmox, Kafka, Jenkins, Vault, Android, and CI/CD, every guide here is a tested, step-by-step walkthrough from my lab.
Android App
Google Play: Reuse Another App’s App-Signing Key
Goal: Make App A use the same Google Play app-signing certificate as App B.Not a merge: Packages, installs, reviews, purchases
Git
Why Do Some Commits Get Fetched and Others Don’t? (Git & AOSP repo)
TL;DR Which commits end up in your local repo is decided by four levers: Change any of these and you
ZFS
ZFS System Backups with zrepl on Ubuntu (ZFS root)
A clean, cron-free way to back up a ZFS-root Ubuntu server: run zrepl on a backup box and pull snapshots
Ubuntu, ZFS
Install Ubuntu 24.04 Server on ZFS Root via Autoinstall
This is a tiny delta to my previous guide (HTTPS + Nginx + SSI already working). The focus here is
Ubuntu
Install Ubuntu 24.04.2 with NoCloud Autoinstall over HTTPS
What is Autoinstall (Ubuntu 24.04)? Autoinstall is Ubuntu Server’s unattended installation in Subiquity. You provide a YAML answer file (user-data)
Windows
Remove All Microsoft Defender Exclusions on Windows 11
Tested: Windows 11 Pro + PowerShell 7.5.4 (run terminal as Administrator). One-shot removal About the red errors If you see:
Windows
Install PowerShell 7 on Windows 11 (Keep 5.1 Side-by-Side)
TL;DR PowerShell 7 installs next to Windows PowerShell 5.1. Use pwsh for 7.x and powershell for 5.1. Fastest install: What
AOSP, Ccache, Ubuntu
Making AOSP’s nsjail Work with AppArmor (Ubuntu 24.04)
TL;DR On Ubuntu 24.04 (kernel 6.8) with kernel.apparmor_restrict_unprivileged_userns=1, our AOSP 16 (also applicable to 15 and similar versions) builds showed:
AOSP, Ubuntu
Fixing nsjail “Permission denied” on Ubuntu 24.04 when Building AOSP
TL;DR If your AOSP build fails with: it almost always means your system is blocking unprivileged user namespaces under AppArmor.