在使用 Linux OS(Fedora) 时候，会碰到内核版本更新后无法进入 KDE 桌面的情况，需要重新编译下最新显卡驱动，无法进入桌面只能进入命令行模式进行操作, 使用 Ctrl+Alt+F2 进入一个终端，需要用一个 U盘 来拷贝一个最新的 N 卡驱动到本地，那么如何挂载一个外置硬盘或者 U盘 呢，记录一下挂载方法
1.需要Root权限
su
********
2.在 /mnt 下建一个需要挂载的文件夹
- 这里就命名为 USB 为例
mkdir /mnt/USB
3.使用 fdisk -l 查看磁盘分区情况和 U盘位置
[root@localhost mnt] # fdisk -l
Disk /dev/sda: 1.8 TiB, 2000398934016 bytes, 3907029168 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disklabel type: dos
Disk identifier: 0xa4456369
Device Boot Start End Sectors Size Id Type
/dev/sda1 2048 3907028991 3907026944 1.8T f W95 Ext'd (LBA)
/dev/sda5 4096 419670015 419665920 200.1G 7 HPFS/NTFS/exFAT
/dev/sda6 419672064 838866943 419194880 199.9G 7 HPFS/NTFS/exFAT
/dev/sda7 * 838868992 839892991 1024000 500M 83 Linux
/dev/sda8 839895040 3907028991 3067133952 1.4T 8e Linux LVM
Disk /dev/sdb: 29.8 GiB, 32017047552 bytes, 62533296 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x83f9dd74
Device Boot Start End Sectors Size Id Type
/dev/sdb1 * 2048 62531583 62529536 29.8G 7 HPFS/NTFS/exFAT
Disk /dev/mapper/fedora-root: 50 GiB, 53687091200 bytes, 104857600 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk /dev/mapper/fedora-swap: 7.8 GiB, 8388608000 bytes, 16384000 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk /dev/mapper/fedora-home: 1.4 TiB, 1508288495616 bytes, 2945875968 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
- 在这里面可以看到各个分区的的挂载情况
- 插入U盘再次执行
fdisk -l
[root@localhost mnt] # fdisk -l
Disk /dev/sda: 1.8 TiB, 2000398934016 bytes, 3907029168 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disklabel type: dos
Disk identifier: 0xa4456369
Device Boot Start End Sectors Size Id Type
/dev/sda1 2048 3907028991 3907026944 1.8T f W95 Ext'd (LBA)
/dev/sda5 4096 419670015 419665920 200.1G 7 HPFS/NTFS/exFAT
/dev/sda6 419672064 838866943 419194880 199.9G 7 HPFS/NTFS/exFAT
/dev/sda7 * 838868992 839892991 1024000 500M 83 Linux
/dev/sda8 839895040 3907028991 3067133952 1.4T 8e Linux LVM
Disk /dev/sdb: 29.8 GiB, 32017047552 bytes, 62533296 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x83f9dd74
Device Boot Start End Sectors Size Id Type
/dev/sdb1 * 2048 62531583 62529536 29.8G 7 HPFS/NTFS/exFAT
Disk /dev/mapper/fedora-root: 50 GiB, 53687091200 bytes, 104857600 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk /dev/mapper/fedora-swap: 7.8 GiB, 8388608000 bytes, 16384000 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk /dev/mapper/fedora-home: 1.4 TiB, 1508288495616 bytes, 2945875968 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk /dev/sdg: 14.6 GiB, 15614803968 bytes, 30497664 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0xcad4ebea
Device Boot Start End Sectors Size Id Type
/dev/sdg4 * 256 30497663 30497408 14.6G c W95 FAT32 (LBA)
- 会发现再最后没多了一个 14.6 GB 的分区，这个就是刚插入的 U盘 驱动是
/dev/sdg4这就需要挂载到 USB 下使用的位置
4.使用 mount 挂载
- 挂载
mount -t vfat /dev/sdg4 /mnt/USB
- 可以查看挂载上的 U盘
ls -la /mnt/USB/
drwxr-xr-x 5 root root 8192 Jul 11 2015 boot
-rwxr-xr-x 1 root root 395268 Jul 11 2015 bootmgr
-rwxr-xr-x 1 root root 1152864 Jul 11 2015 bootmgr.efi
- 也可以进入挂载的 U盘的目录
cd /mnt/USB/
５．使用 unmount 卸载 U盘
- 为了避免直接拔出 U盘 可能造成文件丢失，使用完了需要卸载一下
umount /mnt/USB
*若提示 U盘繁忙
umount: /mnt/USB: target is busy
(In some cases useful info about processes that
use the device is found by lsof(8) or fuser(1).)
- 执行 ｀cd ../..｀ 再卸载