Q2: Why isn't my counter incrementing?

If your counter isn't incrementing, check these issues:

1. File permissions: Counter file must be writable (666)
2. File path: Verify $count_file path is correct
3. File exists: Ensure counter.txt exists and contains a number
4. File locking: Check if another process has locked the file

Test by running:

ls -la counter.txt
cat counter.txt