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小编给大家分享一下Linux系统中添加删除分区命令是什么，希望大家阅读完这篇文章之后都有所收获，下面让我们一起去探讨吧！
fdisk -l 查看系统上的分区信息
[root@fei ~]# fdisk -l Disk /dev/sda: 21.5 GB, 21474836480 bytes //总计21.5G 255 heads, 63 sectors/track, 2610 cylinders // 255个磁面，63个扇区，2610个磁柱 Units = cylinders of 16065 * 512 = 8225280 bytes //每个磁柱容量 Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x0005936c Device Boot Start End Blocks Id System /dev/sda1 * 1 26 204800 83 Linux Partition 1 does not end on cylinder boundary. /dev/sda2 26 1332 10485760 83 Linux /dev/sda3 1332 1593 2097152 82 Linux swap / Solaris 1234567891011121314
fdisk /dev/sda： 对/dev/sda/进行分区 磁盘分区表示： hda1 hda2 hdb1 hdb2…… sda1 sda2 sdb1 sdb2…… hd大多为IDE硬盘 ， sd大多为SCSI或移动存储
[root@fei ~]# fdisk /dev/sda
WARNING: DOS-compatible mode is deprecated. It's strongly recommended to
switch off the mode (command 'c') and change display units to
sectors (command 'u').
Command (m for help):
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注释 ：//Command (m for help):
查看帮助信息：输入m，看到如下信息
Command action # 输出帮助信息
a toggle a bootable flag #设置启动信息
b edit bsd disklabel # 编 辑分区标签
c toggle the dos compatibility flag
d delete a partition # 这是删除一个分区的动作
l list known partition types # l是列出分区类型，以供我们设置相应分区的类型
m print this menu # m 是列出帮助信息；
n add a new partition # 添加一个分区；
o create a new empty DOS partition table # 创建一个新的DOS分区表
p print the partition table # p列出分区表；
q quit without saving changes #不保存退出；
s create a new empty Sun disklabel
t change a partition's system id #t 改变分区类型 id
u change display/entry units 改变现实单位
v verify the partition table
w write table to disk and exit # 把分区表写入硬盘并退出
x extra functionality (experts only) #扩展应用，专家功能
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- 选择n 来添加一个分区
Command (m for help): n
Command action
e extended #e,扩展分区
p primary partition (1-4) #p，主分区1-4
p
Selected partition 4 #因为sda1-3已分，所有默认sda4
First cylinder (1593-2610, default 1593): #磁柱开始位置，采用默认，直接回车
Using default value 1593 #磁柱开始位置
Last cylinder, +cylinders or +size{K,M,G} (1593-2610, default 2610): +100M #磁柱解释位置，设置磁盘分区大小
Command (m for help): p #查看一下当前磁盘信息
Disk /dev/sda: 21.5 GB, 21474836480 bytes
255 heads, 63 sectors/track, 2610 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: 0x0005936c
Device Boot Start End Blocks Id System
/dev/sda1 * 1 26 204800 83 Linux
Partition 1 does not end on cylinder boundary.
/dev/sda2 26 1332 10485760 83 Linux
/dev/sda3 1332 1593 2097152 82 Linux swap / Solaris
/dev/sda4 1593 1606 111459 83 Linux //添加成功，sda4
Command (m for help): wq //保存退出
The partition table has been altered!
Calling ioctl() to re-read partition table.
WARNING: Re-reading the partition table failed with error 16: 设备或资源忙.
The kernel still uses the old table. The new table will be used at
the next reboot or after you run partprobe(8) or kpartx(8)
Syncing disks.
1234567891011121314151617181920212223242526272829303132333435363738partprobe 或者 partx -a /dev/sda 分区之后，让内核更新分区信息，否则系统需要restart后，内核才能识别新的分区
mkfs.ext4 /dev/sda4 创建ext4文件系统，格式化.
[root@fei ~]# mkfs.ext4 /dev/sda4 mke2fs 1.41.12 (17-May-2010) 文件系统标签= 操作系统:Linux 块大小=1024 (log=0) 分块大小=1024 (log=0) Stride=0 blocks, Stripe width=0 blocks 3776 inodes, 15068 blocks 753 blocks (5.00%) reserved for the super user 第一个数据块=1 Maximum filesystem blocks=15466496 2 block groups 8192 blocks per group, 8192 fragments per group 1888 inodes per group Superblock backups stored on blocks: 8193 正在写入inode表: 完成 Creating journal (1024 blocks): 完成 Writing superblocks and filesystem accounting information: 完成 This filesystem will be automatically checked every 38 mounts or 180 days, whichever comes first. Use tune2fs -c or -i to override. 1234567891011121314151617181920212223
将/dev/sda4 挂载
[root@fei ~]# mount /dev/sda4 /mnt [root@fei ~]# df-h -bash: df-h: command not found [root@fei ~]# df -h Filesystem Size Used Avail Use% Mounted on /dev/sda2 9.8G 1.4G 8.0G 15% / tmpfs 931M 0 931M 0% /dev/shm /dev/sda1 190M 35M 145M 20% /boot /dev/sr0 3.7G 3.7G 0 100% /media /dev/sda4 14M 130K 13M 2% /mnt //已将/dev/sda4挂载 12345678910
[root@fei ~]# fdisk /dev/sda WARNING: DOS-compatible mode is deprecated. It's strongly recommended to switch off the mode (command 'c') and change display units to sectors (command 'u'). Command (m for help): d //删除一个分区 Partition number (1-4): 4 //选择删除一个分区，如果删除了扩展分区，扩展分区之下的逻辑分区都会删除 Command (m for help): p Disk /dev/sda: 21.5 GB, 21474836480 bytes 255 heads, 63 sectors/track, 2610 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: 0x0005936c Device Boot Start End Blocks Id System /dev/sda1 * 1 26 204800 83 Linux Partition 1 does not end on cylinder boundary. /dev/sda2 26 1332 10485760 83 Linux /dev/sda3 1332 1593 2097152 82 Linux swap / Solaris //sda4已经被删除 Command (m for help): wq //若之前有错误操作，只有不输入w只输入q退出即可
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