分区脚本：
#!/bin/bash
fdisk /dev/sda <<EFO
n
p
4

w
EFO

partx -a /dev/sda
mkfs.ext4 /dev/sda4
mkdir /hadoop
echo “/dev/sda4 /hadoop ext4 defaults 0 0” >> /etc/fstab
mount -a
echo “df -h”
df -h