merrell@heimdall:~$ java -version
openjdk version "21.0.4" 2024-07-16 LTS
merrell@heimdall:~$ cat current_milestone.txt
Tracking Progress: Cay S. Horstmann - Core Java (Volume I)
🎯 Core focus: Chapter 12 - Concurrency & Thread Synchronization
merrell@heimdall:~$ _