Fix “Unsupported Class File Major Version 65” in Flutter Android Builds (Java 21 Issue)
When building a Flutter app for Android, you might run into this cryptic error during the Gradle build phase: If […]
Flutter
Flutter
Getting Started with FVM (Flutter Version Management) on Windows
Managing multiple Flutter versions is a common need for developers working across different projects. FVM (Flutter Version Management) makes this
Chocolatey
How to Install and Use Chocolatey on Windows 11
Chocolatey is a command-line package manager for Windows. It lets you install, upgrade, and manage software like Git, Python, Node.js,
Windows
Should You Enable Developer Mode in Windows 11?
If you’re doing software development on Windows 11, you might come across an option called Developer Mode. But what does
Keycloak, ThingsBoard
How to Enable OAuth2 Login in ThingsBoard 4.0.1 Community Edition Using Keycloak and HAProxy
ThingsBoard is a powerful open-source IoT platform supporting device management, telemetry, dashboards, and multi-tenancy. In this guide, I’ll show you
Keycloak
Enable Google Login by Adding Google as an Identity Provider in Keycloak
You can easily allow users to log in to your Keycloak realm using their Google accounts. This guide walks you
AWS EC2, Email Hosting, Keycloak
Configure Keycloak Email with Zoho Mail on AWS EC2
When running Keycloak on an AWS EC2 instance, like my own deployment at keycloak.maksonlee.com, you’ll likely want to enable features
Jenkins
How to Enable Role-Based Security in Jenkins
By default, Jenkins allows all logged-in users full access, convenient for testing, but dangerous for real teams. Even matrix-based security
Jenkins, Keycloak
Map Keycloak Client Roles to Jenkins Groups
In a previous post, we integrated Jenkins with Keycloak using OpenID Connect (OIDC). Now let’s go one step further: map
Keycloak, OpenDJ
Sync OpenDJ Nested Groups to Keycloak
When integrating OpenDJ with Keycloak, syncing LDAP groups, especially nested groups, as Keycloak groups is essential for centralized, scalable access control across applications. Unlike OpenLDAP, OpenDJ