[Rails] PUT v.s. PATCH

The difference between PUT and PATCH in Rails. Rails 4 switched from PUT to PATCH for resource updates to follow proper HTTP semantics, where PUT means full replacement and PATCH means partial update.

[AWS] ubuntu swap

AWS EC2 Ubuntu 新增 1GB swap 的完整指令步驟,並提醒 micro plan 用戶需注意 I/O 用量上限,建議需要時才啟用以避免額外費用。