Lesson Focus
What this lesson covers
Linux+ frequently tests “disk full” scenarios because the correct answer depends on what is actually exhausted. This episode explains capacity versus inodes as two separate resources a filesystem can run out of: capacity is the storage space for data blocks, while inodes are the metadata objects that represent files and directories. When inodes are exhausted, you can see “No space left on device” even though capacity appears available, and exam questions often hide this in symptoms like a system that can’t create new small files despite showing free gigabytes. You’ll learn a mental checklist that starts by defining the failure precisely—what operation fails, where it fails, and whether the error is consistent across directories—so you avoid treating every “full disk” as the same problem.
