CloudWatch Agent on Linux: Fixing Log Collection with ACLs Instead of chmod

If you’ve ever stared at a CloudWatch Agent that’s quietly failing to collect logs, you already know how frustrating the silence can be. No errors, no alerts — just missing data in your AWS console. Nine times out of ten, the culprit is a Linux log permissions issue, and the quick fix most people try first — chmod — can open up security holes you really don’t want in production.