Linux中df命令查询磁盘信息和fdisk命令分区的用法

[root@localhost ~]# df #列出各文件系统的磁盘空间使用情况
[root@localhost ~]# df -ia #列出各文件系统的i节点使用情况
[root@localhost ~]# df -T #列出文件系统的类型
[root@localhost ~]# df -h #目前磁盘空间和使用情况 以更易读的方式显示
[root@localhost ~]# df -k #以单位显示磁盘的使用情况

[root@localhost ~]# fdisk -l </p> <p>Disk /dev/sda: 500.1 GB, 500107862016 bytes
255 heads, 63 sectors/track, 60801 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes</p> <p> Device Boot Start End Blocks Id System
/dev/sda1 * 1 17 136552 83 Linux
/dev/sda2 18 279 2104515 82 Linux swap / Solaris
/dev/sda3 280 60801 486142965 5 Extended
/dev/sda5 280 60801 486142964+ 83 Linux

[root@localhost ~]# fdisk /dev/hdc #分区时，不要加上数字
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): m #可以查看帮助
Command action
a toggle a bootable flag
b edit bsd disklabel
c toggle the dos compatibility flag
d delete a partition #删除分区
l list known partition types #列举已知分区
m print this menu
n add a new partition #增加分区
o create a new empty DOS partition table
p print the partition table #显示分区表
q quit without saving changes #不保存退出分区
s create a new empty Sun disklabel
t change a partition's system id #改变分区ID
u change display/entry units
v verify the partition table
w write table to disk and exit #保存分区操作
x extra functionality (experts only)

Command (m for help): p
Disk /dev/hdc: 41.1 GB, 41174138880 bytes #磁盘名称和大小
255 heads, 63 sectors/track, 5005 cylinders #磁头、磁区与磁柱数量，多少
Units = cylinders of 16065 * 512 = 8225280 bytes #每个磁柱的大小
Device Boot Start End Blocks Id System
/dev/hdc1 * 1 13 104391 83 Linux
/dev/hdc2 14 1288 10241437+ 83 Linux
/dev/hdc3 1289 1925 5116702+ 83 Linux
/dev/hdc4 1926 5005 24740100 5 Extended
/dev/hdc5 1926 2052 1020096 82 Linux swap / Solaris
Command (m for help): q # q是不保存退出，w不要随便输入

[root@server7 ~]# fdisk -cl /dev/vdb
Disk /dev/vdb: 8589 MB, 8589934592 bytes
16 heads, 63 sectors/track, 16644 cylinders
Units = cylinders of 1008 * 512 = 516096 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0xce720981
Device Boot Start End Blocks Id System
/dev/vdb1 3 206 102400 83 Linux
/dev/vdb2 206 409 102400 83 Linux
/dev/vdb3 409 612 102400 83 Linux
[root@server7 ~]# fdisk -ul /dev/vdb
Disk /dev/vdb: 8589 MB, 8589934592 bytes
16 heads, 63 sectors/track, 16644 cylinders, total 16777216 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0xce720981
Device Boot Start End Blocks Id System
/dev/vdb1 2048 206847 102400 83 Linux
Partition 1 does not end on cylinder boundary.
/dev/vdb2 206848 411647 102400 83 Linux
Partition 2 does not end on cylinder boundary.
/dev/vdb3 411648 616447 102400 83 Linux
Partition 3 does not end on cylinder boundary.