當Linux系統硬盤還有不少空間的時候,我們能夠使用fdisk工具對系統進行分區,以滿足個人需求,那麼fdisk工具要如何使用呢?下面小編就給大家介紹下Linux使用fdisk建立分區的方法,感興趣的朋友可以來了解下。
首先查看硬盤信息
fdisk -l 如果有硬盤有剩余空間就可以對其進行分區
[root@bogon 桌面]# fdisk -l
Disk /dev/sda: 85.9 GB, 85899345920 bytes
255 heads, 63 sectors/track, 10443 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x000471ad
Device Boot Start End Blocks Id System
/dev/sda1 * 1 26 204800 83 Linux
Partition 1 does not end on cylinder boundary.
/dev/sda2 26 3851 30720000 83 Linux
/dev/sda3 3851 4106 2048000 82 Linux swap / Solaris
/dev/sda4 4106 10444 50912256 5 Extended
/dev/sda5 4106 10444 50911232 83 Linux
Disk /dev/sdb: 21.5 GB, 21474836480 bytes
255 heads, 63 sectors/track, 2610 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000
#從上面看出/dev/sda空間已經用完了,/dev/sdb沒有使用。
下面我們對/dev/sdb 進行分區
[root@bogon 桌面]# fdisk /dev/sdb
Device contains neither a valid DOS partition table, nor Sun, SGI or OSF disklabel
Building a new DOS disklabel with disk identifier 0xfaa2aa49.
Changes will remain in memory only, until you decide to write them.
After that, of course, the previous content won‘t be recoverable.
Warning: invalid flag 0x0000 of partition table 4 will be corrected by w(rite)
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
Command action
a toggle a bootable flag
b edit bsd disklabel
c toggle the dos compatibility flag
d delete a partition
l list known partition types
m print this menu
n add a new partition
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
u change display/entry units
v verify the partition table
w write table to disk and exit
x extra functionality (experts only)
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fdisk選中/dev/sdb 輸入m所有基本選項都出現,輸入n新建分區
Command (m for help): n
Command action
e extended
p primary partition (1-4)
有擴展分區和主分區,邏輯分區在擴展分區中建立。注意到括號中的1-4,最多只能建四個主分區(包括擴展分區)。先建一個主分區:
Command (m for help): n
Command action
e extended
p primary partition (1-4)
p #建主分區
Partition number (1-4): 1 #分區號為1
First cylinder (1-2610, default 1): #直接回車默認從第一個柱面開始劃分
Using default value 1
Last cylinder, +cylinders or +size{K,M,G} (1-2610, default 2610): +2G #加空間大小,這裡有很多種選擇:+後面單位可以接M,G,K(記得要大寫)表示劃分你所加的空間,也可以是柱面數。不管怎樣都不能超過該磁盤剩余的空間否則無效。
Command (m for help): p #分好後查看分區信息,剛所做的所有一目了然。
Disk /dev/sdb: 21.5 GB, 21474836480 bytes
255 heads, 63 sectors/track, 2610 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0xfaa2aa49
Device Boot Start End Blocks Id System
/dev/sdb1 1 262 2104483+ 83 Linux
同上所述建立擴展分區:
Command (m for help): n
Command action
e extended
p primary partition (1-4)
e #建立擴展分區
Partition number (1-4): 4
First cylinder (263-2610, default 263):
Using default value 263
Last cylinder, +cylinders or +size{K,M,G} (263-2610, default 2610): +4G
Command (m for help): p
Disk /dev/sdb: 21.5 GB, 21474836480 bytes
255 heads, 63 sectors/track, 2610 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0xfaa2aa49
Device Boot Start End Blocks Id System
/dev/sdb1 1 262 2104483+ 83 Linux
/dev/sdb4 263 785 4200997+ 5 Extended
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擴展分區建好我們就可以在擴展分區建立邏輯分區
Command (m for help): n
Command action
l logical (5 or over)
p primary partition (1-4)
l #建邏輯分區
First cylinder (263-785, default 263):
Using default value 263
Last cylinder, +cylinders or +size{K,M,G} (263-785, default 785): +2G
Command (m for help): p
Disk /dev/sdb: 21.5 GB, 21474836480 bytes
255 heads, 63 sectors/track, 2610 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0xfaa2aa49
Device Boot Start End Blocks Id System
/dev/sdb1 1 262 2104483+ 83 Linux
/dev/sdb4 263 785 4200997+ 5 Extended
/dev/sdb5 263 524 2104483+ 83 Linux
上面顯示已經建好一個主分區,一個邏輯分區,但是這些現在還沒有生效我們需要保存退出。
Command (m for help): w #保存退出
The partition table has been altered!
Calling ioctl() to re-read partition table.
Syncing disks.
[root@bogon 桌面]# fdisk -l
Disk /dev/sda: 85.9 GB, 85899345920 bytes
255 heads, 63 sectors/track, 10443 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x000471ad
Device Boot Start End