Worked on security hardening and reliability improvements for the azurelinux-security/azurelinux repository, focusing on a targeted bug fix rather than new feature development. Addressed an issue with Rsyslog startup by implementing a patch in C that ensures unused file descriptors are closed during initialization, leveraging Linux kernel internals and system programming expertise. The solution uses /proc to manage file descriptors and includes fallback logic for environments lacking /proc/self/fd, maintaining compatibility across diverse systemd-based deployments. This work enhanced the security posture and boot performance of Azure Linux images, demonstrating a thorough approach to patch management and end-to-end code review readiness.