fdisk & gdisk

Question 1

fdisk

Answer 1

fdisk is a dialog-driven program for creation and manipulation of partition tables. It understands GPT, MBR, Sun, SGI and BSD partition tables.

Question 2

fdisk

• b
• B
• c
• L
• l
• o

Answer 2

• b, –sector-size <size>, Physical and logical sector size.</size>
• B, –protect-boot, Don’t erase bootbits when creating a new label.
• c, –compatibility [=<mode>], Mode is 'dos' or 'nondos' (default)</mode>
• L, –color [=<when>], Colorize output (auto, always, or never)</when>
• l, list, Display partitions and exit.
• o, –output <list>, Output columns.</list>

Question 3

fdisk

• t
• u
• s

–bytes

• w
• W

Answer 3

• t, –type <type> recognize specified partition table type only.</type>
• u, –units [=<unit>], Display units: 'cylinders' or 'sectors' (default).</unit>
• s, –getsz, Display size in 512-byte sectors.

–bytes, Print SIZE in bytes rather than in human readable format.

• w, –wipe <mode>, Wipe signatures (auto, always, or never).</mode>
• W, –wipe-partitions <mode>, Wipe signatures from new partitions (auto, always, or never).</mode>

Question 4

fdisk

• C
• H
• S

Answer 4

• C, –cylinders <number>, Specify the number of cylinders.</number>
• H, –heads <number>, Specify the number of heads.</number>
• S, –sectors <number>, Specify the number of sectors per track.</number>

Question 5

fdisk -o, –output [OUTPUT COLUMNS]

gpt

dos

bsd

sgi

sun

Answer 5

gpt: Device Start End Sectors Size Type Type-UUID Attrs Name UUID
dos: Device Start End Sectors Cylinders Size Type Id Attrs Boot End-C/H/S Start-C/H/S
bsd: Slice Start End Sectors Cylinders Size Type Bsize Cpg Fsize
sgi: Device Start End Sectors Cylinders Size Type Id Attrs
sun: Device Start End Sectors Cylinders Size Type Id Flags

Question 6

gdisk -l /dev/sda

Answer 6

-l, List the partition table for the specified device and then exit.

Question 7

gdisk

Answer 7

GPT fdisk (aka gdisk) is a text-mode menu-driven program for creation and manipulation of partition tables.