8:vol id

From Linux Man Pages

      vol_id - probe filesystem type and read label and uuid
      
      vol_id [--export] [-t] [-l] [-u] [device]

Contents 1 DESCRIPTION 2 OPTIONS 3 ENVIRONMENT 4 EXIT STATUS 5 RELATED 6 CATEGORY

DESCRIPTION

      vol_id is usually called from a udev rule, to provide udev with the filesystem type, the label and the uuid of a
      volume.  vol_id supports all common filesystem formats and detects various raid setups to prevent the recognition
      of raid members as a volume with a filesystem.

OPTIONS

      --export
         print all values in key/value format to import them into the environment.
 
      -t
         print the filesystem type
 
      -l
         print the label of a volume
 
      -u
         print the uuid of a volume

ENVIRONMENT

      UDEV_LOG
         Set the syslog priority.

EXIT STATUS

      vol_id will only return successful if the value asked for is not empty. All trailing whitespace will be removed,
      spaces replaced by underscore and slashes ignored.

RELATED

      udev(7)

CATEGORY