linux系统fdisk分区命令详解
小编：动力软件园 时间：2018-12-18 16:29:14
1、首先查看分区
[root@localhost ~]# fdisk -l
Disk /dev/vda: 42.9 GB, 42949672960 bytes
16 heads, 63 sectors/track, 83220 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: 0x00038e27
Device Boot Start End Blocks Id System
/dev/vda1 * 3 1018 512000 83 Linux
Partition 1 does not end on cylinder boundary.
/dev/vda2 1018 83221 41430016 8e Linux LVM
Partition 2 does not end on cylinder boundary.
从上边信息可以看出vda硬盘已经经过分区
Disk /dev/vdb: 64.4 GB, 64424509440 bytes
16 heads, 63 sectors/track, 124830 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: 0x00000000
vdb没有分区
Disk /dev/mapper/VolGroup-lv_root: 38.3 GB, 38260441088 bytes
255 heads, 63 sectors/track, 4651 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
Disk /dev/mapper/VolGroup-lv_swap: 4160 MB, 4160749568 bytes
255 heads, 63 sectors/track, 505 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
df只能查看已分区的信息
[root@localhost ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/VolGroup-lv_root
35G 1.2G 32G 4% /
tmpfs 939M 0 939M 0% /dev/shm
/dev/vda1 477M 28M 425M 7% /boot
[root@localhost ~]#
2、使用分区命令
fdisk /dev/vdb
n
p
3、w 保存退出 并 fdisk -l查看
4、partprobe 强制执行partprobe保存分区表。centos下无法执行。未扎到原因。
5、mkfs -t ext4 /dev/vdb
6、挂载到新的空目录下，fdisk命令只能看到分区不能看到是否被挂载（想知道是否被挂载 必须使用mount或者df）
[root@localhost ~]# mkdir /data
[root@localhost ~]#
[root@localhost ~]#
[root@localhost ~]#
[root@localhost ~]# mount /dev/vdb /data
7、每次重启都需要挂载分区，要修改fstab 实现自动挂载
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