最近从事linux，实验室一个破服务器，能连上网，但是输入这样的命令： yum -y install gcc
yum -y install gcc-c++ ，居然说是没有这样的镜像，也罢，就用U盘搞了一个linux gcc，gcc-c++，然后问题来了？
外挂哪家强？ 完全找不到移动设备有木有。 嗷嗷的哭呀！
果断的敲入： fdisk -l -->查看分区的状态
Disk /dev/sdb: 4051 MB, 4051697664 bytes
151 heads, 42 sectors/track, 1247 cylinders
Units = cylinders of 6342 * 512 = 3247104 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0xc3072e18
Device Boot Start End Blocks Id System
/dev/sdb1 1 1248 3956708 c W95 FAT32 (LBA)
找到了，U盘的位置，但是就是进不去呀!
于是先建立一个路径： mkdir mnt/usb
有木有，果然的去问了迅雷工作的学长韦回超学长，说是我mount命令用错了！！
我看了，我的命令一下：mount /dev/gdb1/mnt/usb
并mount -help了一下！
恩！ 是的！ 用错了！ 少了一个空格！！ mount file1 file2
mount /dev/gdb1 /mnt/usb
这样就挂载好了！
总结一下步骤吧！：
第一步： fdisk -l -->查看外界设备的位置 比如这个优盘 /dev/sdb1
[[email protected] ~]# fdisk -l
Disk /dev/sda: 500.1 GB, 500107862016 bytes
255 heads, 63 sectors/track, 60801 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk identifier: 0x141cccb4
Device Boot Start End Blocks Id System
/dev/sda1 * 1 64 512000 83 Linux
Partition 1 does not end on cylinder boundary.
/dev/sda2 64 60802 487873536 8e Linux LVM
Disk /dev/mapper/vg_tomato2-lv_root: 53.7 GB, 53687091200 bytes
255 heads, 63 sectors/track, 6527 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk identifier: 0x00000000
Disk /dev/mapper/vg_tomato2-lv_swap: 3388 MB, 3388997632 bytes
255 heads, 63 sectors/track, 412 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk identifier: 0x00000000
Disk /dev/mapper/vg_tomato2-lv_home: 442.5 GB, 442503266304 bytes
255 heads, 63 sectors/track, 53797 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk identifier: 0x00000000
Disk /dev/sdb: 4051 MB, 4051697664 bytes
151 heads, 42 sectors/track, 1247 cylinders
Units = cylinders of 6342 * 512 = 3247104 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0xc3072e18
Device Boot Start End Blocks Id System
/dev/sdb1 1 1248 3956708 c W95 FAT32 (LBA)
第二步： 设置一个路径 mkdir mnt/usb -->这个usb什么的就随便的起名字了！
[[email protected] ~]# mkdir /mnt/usb
第三步： 将U盘挂载到这个路径中来！ mount /dev/gdb1 /mnt/usb
这样就ok 了！ 但是最后还是有一个结尾就是卸载这个挂载点 unmount /mnt/usb
[[email protected] ~]# umount /mnt/usb
然后删除路径： rmkdir mnt/usb
[[email protected] ~]# rmdir /mnt/usb
然后就可以去优雅的去使用U盘里的东西啦！！！！