71 fdisk-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

列出所有分区信息

 [root@AY120919111755c246621 tmp]# fdisk -l

 Disk /dev/xvda: 21.5 GB,  bytes
  heads,  sectors/track,  cylinders
 Units = cylinders of  *  =  bytes
 Sector size (logical/physical):  bytes /  bytes
 I/O size (minimum/optimal):  bytes /  bytes
 Disk identifier: 0x00000000

     Device Boot      Start         End      Blocks   Id  System
 /dev/xvda1   *                            Linux
 /dev/xvda2                               Linux swap / Solaris

 Disk /dev/xvdb: 21.5 GB,  bytes
  heads,  sectors/track,  cylinders
 Units = cylinders of  *  =  bytes
 Sector size (logical/physical):  bytes /  bytes
 I/O size (minimum/optimal):  bytes /  bytes
 Disk identifier: 0x56f40944

     Device Boot      Start         End      Blocks   Id  System
 /dev/xvdb2                           +    Linux

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                      % /

 [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 .
 There is nothing wrong with that, but this is larger than ,
 and could in certain setups cause problems with:
 ) software that runs at boot time (e.g., old versions of LILO)
 ) booting and partitioning software from other OSs
    (e.g., DOS FDISK, OS/ 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     列出分区信息
    m   print this menu                打印分区
    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)

离开 fdisk 时按下 q，那么所有的动作都不会生效！相反的， 按下w就是动作生效的意思。

 Command (m for help): p  <== 这里可以输出目前磁盘的状态

 Disk /dev/hdc: 41.1 GB,  bytes        <==这个磁盘的文件名与容量
  heads,  sectors/track,  cylinders      <==磁头、扇区与磁柱大小
 Units = cylinders of  *  =  bytes <==每个磁柱的大小

    Device Boot      Start         End      Blocks   Id  System
 /dev/hdc1   *                                Linux
 /dev/hdc2                          +    Linux
 /dev/hdc3                         +    Linux
 /dev/hdc4                              Extended
 /dev/hdc5                              Linux swap / Solaris
 # 装置文件名 启动区否 开始磁柱    结束磁柱  1K大小容量 磁盘分区槽内的系统

 Command (m for help): q

想要不储存离开吗？按下 q 就对了！不要随便按 w 啊！

使用 p 可以列出目前这颗磁盘的分割表信息，这个信息的上半部在显示整体磁盘的状态。