linux磁盘分区

时间：2022-12-14 08:56:02

fdisk

fdisk 是 Linux 的磁盘分区表操作工具。

语法：

fdisk [-l] 装置名称

选项与参数：

  • -l ：输出后面接的装置所有的分区内容。若仅有 fdisk -l 时， 则系统将会把整个系统内能够搜寻到的装置的分区均列出来。

实例 1

列出所有分区信息

[root@AY120919111755c246621 tmp]# fdisk -l

Disk /dev/xvda: 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

    Device Boot      Start         End      Blocks   Id  System
/dev/xvda1   *           1        2550    20480000   83  Linux
/dev/xvda2            2550        2611      490496   82  Linux swap / Solaris

Disk /dev/xvdb: 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: 0x56f40944

    Device Boot      Start         End      Blocks   Id  System
/dev/xvdb2               1        2610    20964793+  83  Linux

实例 2

找出你系统中的根目录所在磁盘，并查阅该硬盘内的相关信息

[root@www ~]# df /            <==注意：重点在找出磁盘文件名而已
Filesystem           1K-blocks      Used Available Use% Mounted on
/dev/hdc2              9920624   3823168   5585388  41% /

[root@www ~]# fdisk /dev/hdc  <==仔细看，不要加上数字喔！
The number of cylinders for this disk is set to 5005.
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):     <==等待你的输入！

输入 m 后，就会看到底下这些命令介绍

Command (m for help): m   <== 输入 m 后，就会看到底下这些命令介绍
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partition
   l   list known partition types
   m   print this menu
   n   add a new partition           <==新增一个partition
   o   create a new empty DOS partition table
   p   print the partition table     <==在屏幕上显示分割表
   q   quit without saving changes   <==不储存离开fdisk程序
   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  <==将刚刚的动作写入分割表
   x   extra functionality (experts only)

linux磁盘分区

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