1. 创建分区
[root@ ~]# fdisk /dev/sda
Command (m for help): p
Disk /dev/sda: 42.9 GB, 42949672960 bytes
255 heads, 63 sectors/track, 5221 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sda1 * 1 3916 31455238+ 83 Linux
/dev/sda2 3917 4438 4192965 82 Linux swap / Solaris
/dev/sda3 4439 4960 4192965 83 Linux
Command (m for help): n
Command action
e extended
p primary partition (1-4)
p
First cylinder (4961-5221, default 4961):
Last cylinder or +size or +sizeM or +sizeK (4961-5221, default 5221): +20m
Command (m for help): p
Disk /dev/sda: 42.9 GB, 42949672960 bytes
255 heads, 63 sectors/track, 5221 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sda1 * 1 3916 31455238+ 83 Linux
/dev/sda2 3917 4438 4192965 82 Linux swap / Solaris
/dev/sda3 4439 4960 4192965 83 Linux
/dev/sda4 4961 4963 24097+ 83 Linux
Command (m for help): w
The partition table has been altered!
Calling ioctl() to re-read partition table.
WARNING: Re-reading the partition table failed with error 16: Device or resource busy.
The kernel still uses the old table.
The new table will be used at the next reboot.
Syncing disks.
partprobe
Warning: Unable to open /dev/sr0 read-write (Read-only file system). /dev/sr0 has been opened read-only.
Segmentation fault