Linux
Jason Yang · 22 Nov, 2025
Run an old Ubuntu laptop as a 24/7 headless server with the lid closed: stop it sleeping from the lid, idle timeout, and every sleep target — the logind.conf fix plus systemctl mask (20.04/22.04/24.04).
Framework
Jason Yang · 22 Nov, 2025
Spring Boot 'required a bean of type String' error? It often hits when switching to constructor injection. How to correctly inject @Value into constructors.
Homelab
Jason Yang · 22 Nov, 2025
Blocked from updating BIOS due to low battery? Here is a workaround to bypass the restriction on ASUS laptops using the F11 trick.
System Design
Jason Yang · 22 Nov, 2025
Rate Limiting vs Throttling: often used interchangeably but different — rate limiting controls user quotas, throttling protects system health. The key differences.
Cloud & DevOps
Jason Yang · 22 Nov, 2025
Change the hostname on Amazon Linux so it survives a reboot — edit /etc/sysconfig/network, /etc/hostname, and /etc/hosts so the change persists.
