使用shell脚本实现USB设备的加载与文件复制

　　在Linux操作系统中，如果插入一个USB设备，需要用mount挂载命令才能实现这个设备的加载，下面写一个USB设备挂载与文件复制的Shell程序，程序需求：

　　1、运行时，提示用户输入“y”或者“Y”，确定是否挂载USB设备，U盘文件/dev/sdc1

    if[$ANS="Y" -o $ANS = "y"]
        then mount -t vfat /dev/sdc1 /mnt/usb

　　2、确定是否复制文件到/root

　　好用$?判断一下是否复制成功，$? -eq 0，表示复制成功

    while[$ANS="Y" -o $ANS = "y"]
        do
            ls -lha /mnt/usb
            echo "type the filename you want to copy"
            read FILE
            cp /mnt/usb/"$FILE" /root

　　3、确定是否复制文件到USB设备中

    echo "Do you want to copy files to USB(y/n)"
    read ANS
    while[$ANS="Y" -o $ANS = "y"]
        do
            ls -lh /root
            echo "type the filename you want to copy"
            read FILE
            cp /root/"$FILE" /mnt/usb
            if[ $? -eq 0];then
                echo "Finished"
                else
                echo "Error"
            fi
            echo "any other files(Y/N)"
            read ANS
        done

　　完整的脚本：

    #!/bin/bash
    #autousb
    echo "Welcome to USB"
    echo "Do you want load USB(Y/N)"    
    read ANS
    if[$ANS="Y" -o $ANS = "y"];
        then mount -t vfat /dev/sdc1 /mnt/usb
        echo "Do you want to copy files to /root(y/n)?"
        read ANS
        while[$ANS="Y" -o $ANS = "y"]
        do
            ls -lha /mnt/usb
            echo "type the filename you want to copy"
            read FILE
            cp /mnt/usb/"$FILE" /root
            if[ $? -eq 0];then
                echo "Finished"
                else
                echo "Error"
            fi
        echo "any other files(Y/N)"
        read ANS
        done
    fi
    echo "Do you want to copy files to USB(y/n)"
    read ANS
    while[$ANS="Y" -o $ANS = "y"]
        do
            ls -lh /root
            echo "type the filename you want to copy"
            read FILE
            cp /root/"$FILE" /mnt/usb
            if[ $? -eq 0];then
                echo "Finished"
                else
                echo "Error"
            fi
            echo "any other files(Y/N)"
            read ANS
        done
    echo "Do you want to umount?(y/n)"
    read ANS
    if[$ANS="Y" -o $ANS = "y"];then
            umount /mnt/usb
    else
        echo "umount error"
    fi
    echo "GoodBye!!"