Troubleshooting – Jean's Blog

Suricata IPS: Building a Transparent Network Defense Layer with AF-Packet Bridging

Suricata functions as a powerful engine for Network Intrusion Detection and Prevention (IDS/IPS). This guide demonstrates how to set up Suricata as a transparent Intrusion Prevention System (IPS) within a KVM environment by replacing the kernel bridge with the high-performance AF-Packet mechanism.

ZFS Data Migration: Encrypting Existing Volumes with zfs send and zfs recv

Encrypting previously unencrypted data, such as a legacy ZFS pool, requires a reliable migration strategy. The most robust way to achieve this is by using the powerful ZFS data stream mechanism: zfs send and zfs recv.

The core procedure is simple: create a snapshot, transfer this snapshot, and receive it at a new, encrypted destination.

Nextcloud Client on Chromebook (ARM/aarch64): Solving Two-Way Sync

Short explanation on how to get the Nextcloud Linux desktop client working reliably on a Chromebook. This solution is necessary because the official Android desktop client does not offer true two-way synchronization, which is a critical feature for managing files across systems.

Nextcloud and MinIO Integration: Why Direct S3 Fails and the Filesystem Abstraction Workaround

MinIO is a fantastic Object Storage solution, and I intended to use my distributed MinIO system as the primary external storage for Nextcloud. This distributed setup, which uses Sidekick as a load balancer for seamless node access, proved functional but revealed a critical stability flaw, particularly with mobile uploads.

Nextcloud Migration and Database Performance: Solving Deadlocks with PostgreSQL

Getting the famous “1213 Deadlock found when trying to get lock; try restarting transaction” error in Nextcloud can be frustrating. This issue affected many users and was discussed in bug reports like this: Nextcloud Deadlock Issue
. The community frequently recommends switching the backend database to PostgreSQL. While I was initially skeptical, the migration proved to be the definitive solution for this recurring issue in my setup.

This guide outlines the streamlined procedure for migrating Nextcloud from MariaDB/MySQL to PostgreSQL. The process is uncomplicated and can drastically improve system stability.

Nextcloud Performance Tuning: PHP, Redis, and Database Optimization

Just a quick guide on how I install Nextcloud. This covers Nextcloud 25.0.1 with PHP 8.1 on Debian Bullseye, optimized with Redis, APCu, and MariaDB.