fdisk管理分区
参数 | 作用 |
m | 查看全部可用的参数 |
n | 添加新的分区 |
d | 删除某个分区信息 |
l | 列出所有可用的分区类型 |
t | 改变某个分区的类型 |
p | 查看分区表信息 |
w | 保存并退出 |
q | 不保存直接退出 |
fdisk：磁盘分区,是Linux发行版本中最常用的分区工具
用法：fdisk [选项] device
常用的选项： -l 查看硬盘分区表
[root@ken ~]# ls /dev/sd*
/dev/sda /dev/sda1 /dev/sda2 /dev/sdb
第二步：对sdb划分一个100M的空间
[root@ken ~]# fdisk /dev/sdb
Welcome to fdisk (util-linux 2.23.2). Changes will remain in memory only, until you decide to write them.
Be careful before using the write command. Device does not contain a recognized partition table
Building a new DOS disklabel with disk identifier 0x52997d99. Command (m for help): n #创建一个新的分区
Partition type:
p primary (0 primary, 0 extended, 4 free)
e extended
Select (default p): #默认主分区，直接回车
Using default response p
Partition number (1-4, default 1): #默认为第一个分区编号，直接回车
First sector (2048-41943039, default 2048): #默认第一个扇区开始位置，直接回车
Using default value 2048
Last sector, +sectors or +size{K,M,G} (2048-41943039, default 41943039): +100M #选择大小，前面要使用加号
Partition 1 of type Linux and of size 100 MiB is set Command (m for help): P #查看已经分好的磁盘 Disk /dev/sdb: 21.5 GB, 21474836480 bytes, 41943040 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 label type: dos
Disk identifier: 0x52997d99 Device Boot Start End Blocks Id System
/dev/sdb1 2048 206847 102400 83 Linux Command (m for help): w #w退出保存，q退出不保存
The partition table has been altered! Calling ioctl() to re-read partition table.
Syncing disks.
第三步：格式化
新的磁盘分区使用之前必须先格式化
[root@ken ~]# mkfs.ext4 /dev/sdb1
mke2fs 1.42.9 (28-Dec-2013)
Filesystem label=
OS type: Linux
Block size=1024 (log=0)
Fragment size=1024 (log=0)
Stride=0 blocks, Stripe width=0 blocks
25688 inodes, 102400 blocks
5120 blocks (5.00%) reserved for the super user
First data block=1
Maximum filesystem blocks=33685504
13 block groups
8192 blocks per group, 8192 fragments per group
1976 inodes per group
Superblock backups stored on blocks:
8193, 24577, 40961, 57345, 73729 Allocating group tables: done
Writing inode tables: done
Creating journal (4096 blocks): done
Writing superblocks and filesystem accounting information: done
第四步：挂载使用
[root@ken ~]# mkdir /part
[root@ken ~]# mount /dev/sdb1 /part
[root@ken ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 17G 1.2G 16G 7% /
devtmpfs 476M 0 476M 0% /dev
tmpfs 488M 0 488M 0% /dev/shm
tmpfs 488M 7.7M 480M 2% /run
tmpfs 488M 0 488M 0% /sys/fs/cgroup
/dev/sda1 1014M 130M 885M 13% /boot
tmpfs 98M 0 98M 0% /run/user/0
/dev/sdb1 93M 1.6M 85M 2% /part
第五步：写入到配置文件中，开机自启
[root@ken ~]# echo "/dev/sdb1 /part ext4 defaults 0 0" >> /etc/fstab
/dev/sdb1 | /sdb1 | xfs | defaults | 0 | 0 |
要挂载的分区设备 | 挂载点 | 文件系统类型 | 挂载选项 | 是否备份 | 是否检测 |