Coding Interview
33. Search in Rotated Sorted Array
Jason Yang · 03 Dec, 2025
Search in Rotated Sorted Array (LeetCode 33): a modified O(log n) binary search that finds which half is sorted, with an interactive step visual.
Blog posts — page 18
Linux
How to Open a Specific Port on Ubuntu with UFW
Jason Yang · 03 Dec, 2025
Safely open a specific port on Ubuntu with UFW: check status, enable the firewall without losing SSH access, and verify your rules — step by step.
Tools
How to Back Up and Restore SecureCRT Settings on Ubuntu
Jason Yang · 03 Dec, 2025
Back up and restore your full SecureCRT configuration on Ubuntu with simple terminal commands so you never lose saved sessions when migrating or reinstalling.
Coding Interview
Divide and Conquer (D&C): Beyond Merge Sort
Jason Yang · 03 Dec, 2025
Divide and Conquer is more than Merge Sort: the 3-step design paradigm, how it differs from plain recursion, and the interview patterns that use it.
![[Synology] How to Enable SSH and Log in as Root](/images/covers/synology_nas_ds916--thumb.webp)
Homelab
[Synology] How to Enable SSH and Log in as Root
Jason Yang · 02 Dec, 2025
Enable SSH on Synology NAS and log in as root using 'sudo -i'. A quick guide for advanced DSM administration and secure terminal access.