Quickly map devices, filesystems and mount points with a single command. 12.02.2026 | reading time: 2 min Want to know which device holds which filesystem and where it is mounted? Run `lsblk -f` to get a compact, human-readable map of block devices, filesystems, labels, UUIDs and mount points; the command is a fast first step in any storage troubleshooting workflow. See it in action Run the command and read the tree: ``` $ lsblk -f NAME FSTYPE LABEL UUID MOUNTPOINT sda ├─sda1 vfat BOOT 1234-ABCD /boot/efi ├─sda2 ext4 root 11111111-2222-3333-4444-555555555555 / └─sda3 swap swap 66666666-7777-8888-9999-AAAAAAAAAAAA [SWAP] sdb └─sdb1 ext4 data a1b2c3d4-e5f6-4789-0123-456789abcdef /srv/data nvme0n1 ├─nvme0n1p1 vfat EFI ABCD-EF01 /boot/efi2 ``` What to read first Look at the columns: NAME shows device topology, FSTYPE tells filesystem type, UUID and LABEL identify volumes and MOUNTPOINT shows where the kernel attached them; if a filesystem field is empty the partition is raw or unformatted, so act accordingly. Options that speed up diagnosis Use `lsblk -o` to pick columns you need, `lsblk -J` for JSON output that scripts can parse, `lsblk -p` to show full device paths and `lsblk -r` for raw device ordering; combine with `grep` or `jq` to extract exactly the field you need. Pair it with these helpers When `lsblk -f` shows an unexpected filesystem or unmounted volume, run `blkid` to confirm UUID and type, use `findmnt` to inspect mount ancestry, and consult `fdisk` or `parted` when you must modify partition tables. Final thought A single glance at `lsblk -f` often saves hours of guessing; make it a regular step in maintenance scripts and live troubleshooting, and consider deepening skills for certification to handle complex storage setups—bitsandbytes.academy offers intensive exam preparation for CompTIA Linux+ and LPIC-1. Join Bits & Bytes Academy First class LINUX exam preparation. storage utilities filesystem troubleshooting boot-process
