写一个脚本(前提：请为虚拟机新增一块硬盘，架设它为/dev/sdb),为指定的硬盘创建分区。

1，列出当前系统上所有的磁盘，让用户选择，如果选择quit则退出脚本；如果用户选择错误，就让用户重新选择；

2，档用户选择后，提醒用户确认接下来的操作可能会损坏数据，并请用户确认：如果用户选择y就继续，n就退出；否则，让用户重新选择；

3，抹除那块硬盘上的所有分区(提示，抹除所有分区后执行sync命令，并让脚本睡眠3秒后在分区)，并为其创建三个主分区，第一个为20M，第二个为512M，第三个为128M，切第三个为swap分区类型；(提示：将分区命令通过echo传给fdisk即可实现)

#!/bin/bash

#

echo "Initial a disk..."

echo -e "\033[31mWarning:\033[0m"

fdisk -l 2> /dev/null | grep -o "^Disk /dev/[sh]d[a-z]"

read -p "Your Choose:" PARTDISK

if [ $PARTDISK == 'quit' ];then

echo "quit"

exit 7;

fi

until fdisk -l 2> /dev/null | grep -o "Disk /dev/[sh]d[a-z]" | grep "^Disk $PARTDISK$" &> /dev/null;do

read -p "Wrong option,Your choice aging:" PARTDISK

done

read -p "will destroy all data,continue:" CHOICE

until [ $CHOICE == 'y' -o $CHOICE == 'n' ];do

read -p "Will destroy all data,continue:" CHOICE

done

if [ $CHOICE == 'n' ];then

echo "QUIT"

exit 9;

else

dd if=/dev/zero of=$PARTDISK bs=512 count=1 &> /dev/null

sync

sleep 3

echo 'n

p

1

+20M

n

p

2

+512M

n

p

n

p

3

+128M

t

3

82

w' | fdisk $PARTDISK &> /dev/null

partprobe $PARTDISK

sync

sleep 2

mke2fs -j ${PARTDISK}1 &> /dev/null

mke2fs -j ${PARTDISK}2 &> /dev/null

mkswap ${PARTDISK}3 &> /dev/null

fi

执行过程：

[root@localhost ~]# ./partdisk.sh

Initial a disk...

Warning:

Disk /dev/sda

Disk /dev/sdb

Disk /dev/sdc

Disk /dev/sdd

Your Choose:/dev/sdb

will destroy all data,continue:y

1+0 records in

1+0 records out

512 bytes (512 B) copied, 0.0304787 s, 16.8 kB/s

[root@localhost ~]# fdisk -l

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: 0x00051800

Device Boot      Start         End      Blocks   Id  System

/dev/sda1   *           1          39      307200   83  Linux

Partition 1 does not end on cylinder boundary.

/dev/sda2              39         549     4096000   82  Linux swap / Solaris

Partition 2 does not end on cylinder boundary.

/dev/sda3             549        2611    16567296   83  Linux

Disk /dev/sdb: 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: 0x18756792

Device Boot      Start         End      Blocks   Id  System

/dev/sdb1               1           4       32098+  83  Linux

/dev/sdb2               5          70      530145   83  Linux

/dev/sdb3              71          87      136552+  82  Linux swap / Solaris

Disk /dev/sdc: 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: 0x00000000

Disk /dev/sdd: 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: 0x00000000

[root@localhost ~]# mount /dev/sdb1 /mnt

[root@localhost ~]# ls /mnt

lost+found

[root@localhost ~]# vi partdisk.sh

[root@localhost ~]# umount /mnt