Disk Utility Tool
Utility to manage local disks and volumes
Most commands require an administrator or root user
WARNING: Most destructive operations are not prompted
Usage:  diskutil [quiet] <verb> <options>, where <verb> is as follows:
     list                 (List the partitions of a disk)
     info[rmation]        (Get information on a specific disk or partition)
     listFilesystems      (List file systems available for formatting)
     activity             (Continuous log of system-wide disk arbitration)
     u[n]mount            (Unmount a single volume)
     unmountDisk          (Unmount an entire disk (all volumes))
     eject                (Eject a disk)
     mount                (Mount a single volume)
     mountDisk            (Mount an entire disk (all mountable volumes))
     enableJournal        (Enable HFS+ journaling on a mounted HFS+ volume)
     disableJournal       (Disable HFS+ journaling on a mounted HFS+ volume)
     moveJournal          (Move the HFS+ journal onto another volume)
     enableOwnership      (Exact on-disk User/Group IDs on a mounted volume)
     disableOwnership     (Ignore on-disk User/Group IDs on a mounted volume)
     rename[Volume]       (Rename a volume)
     verifyVolume         (Verify the file system data structures of a volume)
     repairVolume         (Repair the file system data structures of a volume)
     verifyDisk           (Verify the components of a partition map of a disk)
     repairDisk           (Repair the components of a partition map of a disk)
     eraseDisk            (Erase an existing disk, removing all volumes)
     eraseVolume          (Erase an existing volume)
     reformat             (Erase an existing volume with same name and type)
     eraseOptical         (Erase optical media (CD/RW, DVD/RW, etc.))
     zeroDisk             (Erase a disk, writing zeros to the media)
     randomDisk           (Erase a disk, writing random data to the media)
     secureErase          (Securely erase a disk or freespace on a volume)
     partitionDisk        ((re)Partition a disk, removing all volumes)
     resizeVolume         (Resize a volume, increasing or decreasing its size)
     splitPartition       (Split an existing partition into two or more)
     mergePartitions      (Combine two or more existing partitions into one)
     appleRAID <verb>     (Perform additional verbs related to AppleRAID)
     coreStorage <verb>   (Perform additional verbs related to CoreStorage)
     apfs <verb>          (Perform additional verbs related to APFS)
diskutil <verb> with no options will provide help on that verb
-bash-3.2# diskutil list
/dev/disk0 (internal, physical):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *500.1 GB   disk0
   1:                        EFI EFI                     209.7 MB   disk0s1
   2:                  Apple_HFS Macintosh HD            498.4 GB   disk0s2
   3:                 Apple_Boot Recovery HD             650.0 MB   disk0s3
   4:                 Apple_APFS                         248.1 MB   disk0s4
   5:                 Apple_Boot Recovery HD             650.0 MB   disk0s5
/dev/disk1 (disk image):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        +2.1 GB     disk1
   1:                  Apple_HFS OS X Base System        2.0 GB     disk1s1
/dev/disk2 (disk image):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:                            untitled               +5.2 MB     disk2
/dev/disk3 (disk image):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:                            untitled               +524.3 KB   disk3
/dev/disk4 (disk image):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:                            untitled               +524.3 KB   disk4
/dev/disk5 (disk image):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:                            untitled               +524.3 KB   disk5
/dev/disk6 (disk image):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:                            untitled               +2.1 MB     disk6
/dev/disk7 (disk image):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:                            untitled               +524.3 KB   disk7
/dev/disk8 (disk image):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:                            untitled               +524.3 KB   disk8
/dev/disk9 (disk image):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:                            untitled               +12.6 MB    disk9
/dev/disk10 (disk image):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:                            untitled               +4.2 MB     disk10
/dev/disk11 (disk image):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:                            untitled               +1.0 MB     disk11
/dev/disk12 (disk image):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:                            untitled               +2.1 MB     disk12
/dev/disk13 (disk image):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:                            untitled               +524.3 KB   disk13
/dev/disk14 (disk image):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:                            untitled               +524.3 KB   disk14
/dev/disk15 (disk image):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:                            untitled               +1.0 MB     disk15
/dev/disk16 (disk image):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:                            untitled               +6.3 MB     disk16
/dev/disk17 (disk image):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:                            untitled               +6.3 MB     disk17
/dev/disk18 (disk image):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:                            untitled               +524.3 KB   disk18
/dev/disk19 (disk image):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:                            untitled               +2.1 MB     disk19