1、自动卸载分区格式化脚本--创建小型linux

#!/bin/bash
# scripts: rmdisk.sh
# function

#The CH function is auto umount on the disk partition
CH () {
read -p "Enter your choice,if continue,umount the disk.continue:(y/Y)" CH
if [ "$CH" = "Y" -o "$CH" = "y" ];then
  MOUNT=`mount |grep $1 |awk '{print $1}'`
       for i in $MOUNT;do
         fuser $i
         umount $i
        done
 else
       exit
fi
}

#The function FDISK is auto create 3 partition and format.
FDISK () {
dd if=/dev/zero of=$1 bs=512 count=1
partprobe $1
echo '
n
p
1

+100M
n
p
2

+512M
n
p
3

+128M
t
3
82
w ' | fdisk $1 &> /dev/null
[ $? -ne 0 ] && return 68
sync
partprobe $1
sleep 1
mke2fs -j ${1}1 &> /dev/null
PART1=$?
mke2fs -j ${1}2 &> /dev/null
PART2=$?
mkswap ${1}3  &> /dev/null
PART3=$?
[ $PART1 -ne 0 -o $PART2 -ne 0 -o $PART3 -ne 0 ] && return 69
}

#check the partition has benn mounted
read -p "Look at the partition: " DISK
fdisk -l $DISK |grep ^/dev

MOUNT=`fdisk -l $DISK |grep ^/dev |awk '{print $1}'`
for i in $MOUNT;do
mount |grep "$i"
REVTL=$?
if [ $REVTL -eq 0 ];then
 echo "The $i is mounted."
else
echo "The $i is not mounted."
fi
done

read -p "umount the $DISK of partition,and create 3 pattitions: continue(y/n)" CHOICE
if [ "$CHOICE" = "Y" -o "$CHOICE" = "y" ];then
 CH $DISK
 FDISK $DISK
 echo "The action is successful!"
else
 exit
fi