Disk & Filesystem Management (Du/Df/Lsblk/Fstrim)
Finding the hidden mount points stealing your capacity
🧩 The Challenge
Ever had a drive look completely empty but you can’t write a single file to it? Usually, there’s a mount point hidden under a directory that’s eating your block device alive.
đź’ˇ The Fix
Use findmnt to verify your tree and check for shadowed mount points that aren’t where you expect them to be.
findmnt --real --submounts --target /⚙️ Why It Works
Running this lists every single mounted filesystem in a clean, hierarchical view so you can spot overlaps instantly. It cuts through the noise of what df or mount usually dump on your screen.
🚀 Pro-Tip: Pipe it to grep if you suspect a specific path is being hijacked by an automounter.
Linux Tips & Tricks | © ngelinux.com | 9/16/2026