Ubuntu 18.04 LTS 挂在U盘

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本文详细介绍了在Ubuntu系统中如何识别并挂载一个14GB大小的U盘，包括使用fdisk命令查看磁盘信息、通过ls命令判断文件系统类型以及如何正确挂载和卸载U盘。

查看最后一个有大小14G 的就是U盘

ubuntu@ubuntu:~$ sudo fdisk -l

[sudo] password for ubuntu:
Disk /dev/loop0: 86.6 MiB, 90759168 bytes, 177264 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

Disk /dev/loop1: 86.9 MiB, 91099136 bytes, 177928 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

Disk /dev/loop2: 86.9 MiB, 91115520 bytes, 177960 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

Disk /dev/sda: 465.8 GiB, 500107862016 bytes, 976773168 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: gpt
Disk identifier: C7FB83F8-0545-4540-A46C-9AA0758F346A

Device     Start       End   Sectors   Size Type
/dev/sda1   2048      4095      2048     1M BIOS boot
/dev/sda2   4096 976771071 976766976 465.8G Linux filesystem

Disk /dev/sdb: 14.3 GiB, 15376000000 bytes, 30031250 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: 0x0060723f

Device     Boot Start      End Sectors Size Id Type
/dev/sdb1 *     2048 30031249 30029202 14.3G 7 HPFS/NTFS/exFAT

ubuntu@ubuntu:~$ NTFS 格式的

还有一个方式判断：

ls -rtl /dev 看时间判断

crw-rw-rw- 1 root tty       5,   0 Jul 9 13:58 tty
brw-rw---- 1 root disk      8,   0 Jul 10 09:18 sda
brw-rw---- 1 root disk      8,   2 Jul 10 09:18 sda2
brw-rw---- 1 root disk      8,   1 Jul 10 09:18 sda1
drwxrwxrwt 2 root root          40 Jul 13 09:33 shm
drwxr-xr-x 2 root root          80 Jul 13 15:36 bsg
crw-rw---- 1 root disk     21,   1 Jul 13 15:36 sg1
drwxr-xr-x 2 root root        4120 Jul 13 15:36 char
brw-rw---- 1 root disk      8, 16 Jul 13 15:36 sdb
brw-rw---- 1 root disk      8, 17 Jul 13 15:36 sdb1
drwxr-xr-x 7 root root         140 Jul 13 15:36 disk
drwxr-xr-x 2 root root         300 Jul 13 15:36 block

crw-rw-rw- 1 root tty 5, 2 Jul 13 2018 ptmx

指定文件系统类型 NTFS进行挂载：

ubuntu@ubuntu:~$ sudo mount -t ntfs /dev/sdb1 /home/ubuntu/123/
The disk contains an unclean file system (0, 0).
The file system wasn't safely closed on Windows. Fixing.

ubuntu@ubuntu:~$ 提示翻译：磁盘包含一个不干净的文件系统（0, 0）。文件系统在Windows上没有安全关闭。固定。

是一个U盘启动盘

ubuntu@ubuntu:~/123/主目录$ df -lh
Filesystem      Size Used Avail Use% Mounted on
udev            7.8G     0 7.8G   0% /dev
tmpfs           1.6G 2.6M 1.6G   1% /run
/dev/sda2       458G 243G 192G 56% /
tmpfs           7.8G     0 7.8G   0% /dev/shm
tmpfs           5.0M 4.0K 5.0M   1% /run/lock
tmpfs           7.8G     0 7.8G   0% /sys/fs/cgroup
/dev/loop0       87M   87M     0 100% /snap/core/4486
/dev/loop1       87M   87M     0 100% /snap/core/4917
/dev/loop2       87M   87M     0 100% /snap/core/4830
tmpfs           1.6G     0 1.6G   0% /run/user/0
tmpfs           1.6G     0 1.6G   0% /run/user/1000

/dev/sdb1 15G 3.1G 12G 22% /home/ubuntu/123 已挂载

卸载

ubuntu@ubuntu:~/123/主目录$ sudo umount /dev/sdb1
umount: /home/ubuntu/123: target is busy. 不知为何正忙因为在挂在目录下卸载所以正忙尴尬不

ubuntu@ubuntu:~/123/主目录$ sudo umount -l /dev/sdb1 强制卸载

建议 sudo umount /home/ubuntu/123 卸载万一卸载错了如何办