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小編給大家分享一下Linux系統中添加刪除分區命令是什么，希望大家閱讀完這篇文章之后都有所收獲，下面讓我們一起去探討吧！
fdisk -l 查看系統上的分區信息
[root@fei ~]# fdisk -l Disk /dev/sda: 21.5 GB, 21474836480 bytes //總計21.5G 255 heads, 63 sectors/track, 2610 cylinders // 255個磁面，63個扇區，2610個磁柱 Units = cylinders of 16065 * 512 = 8225280 bytes //每個磁柱容量 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： 對/dev/sda/進行分區 磁盤分區表示： hda1 hda2 hdb1 hdb2…… sda1 sda2 sdb1 sdb2…… hd大多為IDE硬盤 ， sd大多為SCSI或移動存儲
[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):
1234567
注釋 ：//Command (m for help):
查看幫助信息：輸入m，看到如下信息
Command action # 輸出幫助信息
a toggle a bootable flag #設置啟動信息
b edit bsd disklabel # 編 輯分區標簽
c toggle the dos compatibility flag
d delete a partition # 這是刪除一個分區的動作
l list known partition types # l是列出分區類型，以供我們設置相應分區的類型
m print this menu # m 是列出幫助信息；
n add a new partition # 添加一個分區；
o create a new empty DOS partition table # 創建一個新的DOS分區表
p print the partition table # p列出分區表；
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 改變分區類型 id
u change display/entry units 改變現實單位
v verify the partition table
w write table to disk and exit # 把分區表寫入硬盤并退出
x extra functionality (experts only) #擴展應用，專家功能
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- 選擇n 來添加一個分區
Command (m for help): n
Command action
e extended #e,擴展分區
p primary partition (1-4) #p，主分區1-4
p
Selected partition 4 #因為sda1-3已分，所有默認sda4
First cylinder (1593-2610, default 1593): #磁柱開始位置，采用默認，直接回車
Using default value 1593 #磁柱開始位置
Last cylinder, +cylinders or +size{K,M,G} (1593-2610, default 2610): +100M #磁柱解釋位置，設置磁盤分區大小
Command (m for help): p #查看一下當前磁盤信息
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: 設備或資源忙.
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 分區之后，讓內核更新分區信息，否則系統需要restart后，內核才能識別新的分區
mkfs.ext4 /dev/sda4 創建ext4文件系統，格式化.
[root@fei ~]# mkfs.ext4 /dev/sda4 mke2fs 1.41.12 (17-May-2010) 文件系統標簽= 操作系統:Linux 塊大小=1024 (log=0) 分塊大小=1024 (log=0) Stride=0 blocks, Stripe width=0 blocks 3776 inodes, 15068 blocks 753 blocks (5.00%) reserved for the super user 第一個數據塊=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 正在寫入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
將/dev/sda4 掛載
[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 //已將/dev/sda4掛載 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 //刪除一個分區 Partition number (1-4): 4 //選擇刪除一個分區，如果刪除了擴展分區，擴展分區之下的邏輯分區都會刪除 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已經被刪除 Command (m for help): wq //若之前有錯誤操作，只有不輸入w只輸入q退出即可
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