findfs
locate filesystems by label or UUID
TLDR
Search by filesystem label
$ findfs LABEL=[label]
Search by filesystem UUID$ findfs UUID=[uuid]
Search by partition label (GPT or MAC)$ findfs PARTLABEL=[partition_label]
Search by partition UUID (GPT only)$ findfs PARTUUID=[partition_uuid]
SYNOPSIS
findfs tag=value
DESCRIPTION
findfs finds a filesystem by label or UUID and prints the device path. It searches all block devices for matching filesystem metadata.
Used in boot scripts and mount operations to locate filesystems reliably.
PARAMETERS
LABEL=label
Search by filesystem labelUUID=uuid
Search by filesystem UUIDPARTLABEL=label
Search by GPT/MAC partition labelPARTUUID=uuid
Search by GPT partition UUID
CAVEATS
Part of util-linux. PARTUUID only available on GPT partition tables. Labels and UUIDs must be unique for reliable matching.