写一个脚本（前提：请为虚拟机新增一块硬盘，假设它为/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，让用户重新选择
2、当用户选择后，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。否则就让用户重新选择
3、删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秒钟后再分区）；并为其创建3个主分区
且第三个是swap分区类型。（分区命令通过echo传送给fdisk即可实现）
#!/bin/bash
echo "Initial a disk.."
echo -e "\033[31mWarning: \033[0m"
fdisk -l | grep -o "^Disk /dev/[sh]d[a-z]"
#!/bin/bash
echo "Initial a disk.."
echo -e "\033[31mWarning: \033[0m"
fdisk -l | grep -o "^Disk /dev/[sh]d[a-z]"
read -p "Your choice: " PARTDISK
if [ $PARTDISK == ‘quit‘ ]; then
echo "quit"
exit 7
fi
until fdisk -l |grep -o "^Disk /dev/[sh]d[a-z]" | grep "^Disk $PARTDISK$" &> /dev/null;do
read -p "Wrong option,Your choice aging:" PARTDISK
done
echo $PARTDISK
read -p "Will destroy all date,continue: " CHOICE
until [ $CHOICE == ‘y‘ -o $CHOICE == ‘n‘ ];do
read -p "Wrong option,Your choice aging:" CHOICE
done
if [ $CHOICE == ‘n‘ ];then
exit 9
echo -e "\033[31mWarning: \033[0m"
fdisk -l | grep -o "^Disk /dev/[sh]d[a-z]"
read -p "Your choice: " PARTDISK
if [ $PARTDISK == ‘quit‘ ]; then
echo "quit"
exit 7
fi
until fdisk -l |grep -o "^Disk /dev/[sh]d[a-z]" | grep "^Disk $PARTDISK$" &> /dev/null;do
echo -e "\033[31mWarning: \033[0m"
fdisk -l | grep -o "^Disk /dev/[sh]d[a-z]"
read -p "Your choice: " PARTDISK
if [ $PARTDISK == ‘quit‘ ]; then
echo "quit"
exit 7
fi
until fdisk -l |grep -o "^Disk /dev/[sh]d[a-z]" | grep "^Disk $PARTDISK$" &> /dev/null;do
read -p "Wrong option,Your choice aging:" PARTDISK
done
echo $PARTDISK
read -p "Will destroy all date,continue: " CHOICE
until [ $CHOICE == ‘y‘ -o $CHOICE == ‘n‘ ];do
read -p "Wrong option,Your choice aging:" CHOICE
done
if [ $CHOICE == ‘n‘ ];then
exit 9
else
dd if=/dev/zero of=$PARTDISK bs=512 count=1 &> /dev/null
sync
echo ‘
n
p
1
+20M
n
p
2
+512M
n
p
3
+100M
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
mke2fs -j ${PARTDISK}3 &> /dev/null
fi
删除一个磁盘的所有分区，只需要覆盖它的MBR就可以了。
dd if=/dev/zero of=/dev/sdb bs=/dev/sdb bs=512 count=1
然后同步到磁盘sync 注：任何操作都是现在内存中完成然后才同步到磁盘上，我们可以手动同步到磁盘。
为了给同步的时间，需要sleep睡3秒。