另外還可以使用cfdisk這個命令對U盤進行分區，這樣是在圖形界面下操作的！
liteng@liteng-desktop:~$ sudo fdisk -l
liteng@liteng-desktop:~$ sudo fdisk -l
Disk /dev/sdb: 3965 MB, 3965190144 bytes
1 heads, 62 sectors/track, 124911 cylinders
Units = cylinders of 62 * 512 = 31744 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000
Device Boot Start End Blocks Id System
/dev/sdb1 * 2 112312 3481641 c W95 FAT32 (LBA)
/dev/sdb2 112313 124911 390569 83 Linux
注：改u盤掛載 /dev/sdb
liteng@liteng-desktop:~$ sudo fdisk /dev/sdb
WARNING: DOS-compatible mode is deprecated. It's strongly recommended to
switch off the mode (command 'c') and change display units to
sectors (command 'u').
Command (m for help): m 注：這裏輸入 m 打印菜單
Command action
a toggle a bootable flag
b edit bsd disklabel
c toggle the dos compatibility flag
d delete a partition 注：減少分區
l list known partition types
注：文件系統類型 列表 id號
m print this menu
n add a new partition 注：增加分區
o create a new empty DOS partition table
p print the partition table
q quit without saving changes
s create a new empty Sun disklabel
t change a partition's system id
注：改變分區文件系統類型
u change display/entry units
v verify the partition table
w write table to disk and exit
注：保存退出
x extra functionality (experts only)
Command (m for help): n 注：增加分區
Command action
e extended
p primary partition (1-4)
p 注：增加主分區
Partition number (1-4): 1
First cylinder (2-124911, default 2):
Using default value 2
Last cylinder, +cylinders or +size{K,M,G} (2-124911, default 124911):
+300M 注：分區大小
Command (m for help): t 注：改變分區文件系統類型
Selected partition 1
Hex code (type L to list codes): l
0 Empty 24 NEC DOS 81 Minix / old Lin bf Solaris
1 FAT12 39 Plan 9 82 Linux swap / So c1 DRDOS/sec (FAT-
2 XENIX root 3c PartitionMagic 83 Linux c4 DRDOS/sec (FAT-
3 XENIX usr 40 Venix 80286 84 OS/2 hidden C: c6 DRDOS/sec (FAT-
4 FAT16 <32M 41 PPC PReP Boot 85 Linux extended c7 Syrinx
5 Extended 42 SFS 86 NTFS volume set da Non-FS data
6 FAT16 4d QNX4.x 87 NTFS volume set db CP/M / CTOS / .
7 HPFS/NTFS 4e QNX4.x 2nd part 88 Linux plaintext de Dell Utility
8 AIX 4f QNX4.x 3rd part 8e Linux LVM df BootIt
9 AIX bootable 50 OnTrack DM 93 Amoeba e1 DOS access
a OS/2 Boot Manag 51 OnTrack DM6 Aux 94 Amoeba BBT e3 DOS R/O
b W95 FAT32 52 CP/M 9f BSD/OS e4 SpeedStor
c W95 FAT32 (LBA) 53 OnTrack DM6 Aux a0 IBM Thinkpad hi eb BeOS fs
e W95 FAT16 (LBA) 54 OnTrackDM6 a5 FreeBSD ee GPT
f W95 Ext'd (LBA) 55 EZ-Drive a6 OpenBSD ef EFI (FAT-12/16/
10 OPUS 56 Golden Bow a7 NeXTSTEP f0 Linux/PA-RISC b
11 Hidden FAT12 5c Priam Edisk a8 Darwin UFS f1 SpeedStor
12 Compaq diagnost 61 SpeedStor a9 NetBSD f4 SpeedStor
14 Hidden FAT16 <3 63 GNU HURD or Sys ab Darwin boot f2 DOS secondary
16 Hidden FAT16 64 Novell Netware af HFS / HFS+ fb VMware VMFS
17 Hidden HPFS/NTF 65 Novell Netware b7 BSDI fs fc VMware VMKCORE
18 AST SmartSleep 70 DiskSecure Mult b8 BSDI swap fd Linux raid auto
1b Hidden W95 FAT3 75 PC/IX bb Boot Wizard hid fe LANstep
1c Hidden W95 FAT3 80 Old Minix be Solaris boot ff BBT
1e Hidden W95 FAT1
Hex code (type L to list codes): c 注：選擇文件系統
Command (m for help): p
注：打印分區情況
Disk /dev/sdb: 3965 MB, 3965190144 bytes
1 heads, 62 sectors/track, 124911 cylinders
Units = cylinders of 62 * 512 = 31744 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000
Device Boot Start End Blocks Id System
/dev/sdb1 2 9912 307241 c W95 FAT32 (LBA)
Command (m for help): a 注：標記 boot * 這個讓在xp下能認到這個分區，最好在第一塊區標記
Partition number (1-4): 1 注：選擇哪個分區
Command (m for help):w 注：保存退出
如果出現如下錯：
The partition table has been altered!
Calling ioctl() to re-read partition table.
WARNING: Re-reading the partition table failed with error 16: 設備或資源忙.
The kernel still uses the old table. The new table will be used at
the next reboot or after you run partprobe(8) or kpartx(8)
Syncing disks.
liteng@liteng-desktop:~$ sudo umount /dev/sdb1
liteng@liteng-desktop:~$ sudo umount /dev/sdb2
liteng@liteng-desktop:~$ sudo mkfs.vfat /dev/sdb1 注：格式化分區 使用與文件系統相對於的命令
藍色的爲要輸入的