fdisk

Linux Shell

分区示例：比如分/dev/sda 硬盘

$ fdisk /dev/sda

The number of cylinders for this disk is set to 19457.
There is nothing wrong with that, but this is larger than 1024,
and could in certain setups cause problems with:
1) software that runs at boot time (e.g., old versions of LILO)
2) booting and partitioning software from other OSs
(e.g., DOS FDISK, OS/2 FDISK)

Command (m for help): m #帮助,输入M
Command action
a   toggle a bootable flag
b   edit bsd disklabel
c   toggle the dos compatibility flag
d   delete a partition  删除一个分区
l   list known partition types
m   print this menu
n   add a new partition 创建一个新的分区
o   create a new empty DOS partition table
p   print the partition table 打印分区表
q   quit without saving changes 退出不保存
s   create a new empty Sun disklabel
t   change a partition\'s system id 改变分区类型
u   change display/entry units 改变显示/输入的单位
v   verify the partition table 验证这个分区表
w   write table to disk and exit  保存退出
x   extra functionality (experts only)
Command (m for help): d #删除分区
Partition number (1-8): 2
Command (m for help): p # 打印分区表
Disk /dev/sda: 160.0 GB, 160041885696 bytes
255 heads, 63 sectors/track, 19457 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0x0003ce53
Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *           1        3825    30720000    7  HPFS/NTFS
/dev/sda3            7650       11474    30720000    7  HPFS/NTFS
/dev/sda4           11475       19457    64123447+   5  Extended
/dev/sda5           11475       14444    23856472+   7  HPFS/NTFS
/dev/sda6           19247       19457     1694826   82  Linux swap / Solaris
/dev/sda7           14445       15660     9767488+  83  Linux
/dev/sda8           15661       19246    28804513+  83  Linux
Partition table entries are not in disk order
Command (m for help): n #建立新分区
Command action
l   logical (5 or over)
p   primary partition (1-4)
p #主分区
Selected partition 2
First cylinder (3825-19457, default 3825): 可以选
Using default value 3825
Last cylinder, +cylinders or +size{K,M,G} (3825-7649, default 7649): 输入分区大小 比如100G
Using default value 7649
Command (m for help):

如果知道自己操作错了，请不要惊慌，用 q 不保
存退出；切记切记！！！！在分区操作错了之时，千万不要输入 w 保存退出

查看磁盘状态

$ sudo fdisk -l

磁盘分区

格式化磁盘

$ sudo mkfs /dev/sdb

分区

进入fdisk

$ sudo fdisk /dev/sdb

查看分区前状态(p)：

添加新分区(n)：

修改分区格式,默认为Linux格式(t):

保存(w):

BTW:如果操作错误，输入q退出。

ref : http://www.cnblogs.com/wangkangluo1/archive/2012/06/08/2541161.html