fdisk
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
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