写一个shell脚本，分别挂载dev/sda1 dev/sda2 dev/sda3 ,并且设置开机自启

#!/bin/bash
# 挂载/dev/sda1，/dev/sda2，/dev/sda3到/mnt/sda1，/mnt/sda2，/mnt/sda3
mount /dev/sda1 /mnt/sda1
mount /dev/sda2 /mnt/sda2
mount /dev/sda3 /mnt/sda3

# 设置开机自启动
echo "/dev/sda1 /mnt/sda1 ext4 defaults 0 0" >> /etc/fstab
echo "/dev/sda2 /mnt/sda2 ext4 defaults 0 0" >> /etc/fstab
echo "/dev/sda3 /mnt/sda3 ext4 defaults 0 0" >> /etc/fstab

echo "挂载完成，已设置开机自启动"