linux应用

xrisk123@ubuntu:~$ sudo -i            #切换到主用户
root@ubuntu:~# fdisk -l               #查看u盘是否被识别，识别的U盘是在哪个位置

Disk /dev/sda: 21.5 GB, 21474836480 bytes
255 heads, 63 sectors/track, 2610 cylinders, total 41943040 sectors
Units = 扇区 of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x0000bcfa

   设备 启动      起点          终点     块数   Id  系统
/dev/sda1   *        2048    39845887    19921920   83  Linux
/dev/sda2        39847934    41940991     1046529    5  扩展
/dev/sda5        39847936    41940991     1046528   82  Linux 交换 / Solaris

Disk /dev/sdb: 2000.4 GB, 2000398933504 bytes
255 heads, 63 sectors/track, 243201 cylinders, total 3907029167 sectors
Units = 扇区 of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 33553920 bytes
Disk identifier: 0xa694e4aa

   设备 启动      起点          终点     块数   Id  系统
/dev/sdb1            2048  3907026943  1953512448    7  HPFS/NTFS/exFAT
root@ubuntu:~# mkdir /mnt/empty
root@ubuntu:~# mount /dev/sdb1 /mnt/empty     #挂载不了   说是可能已经挂载了或者在占用
Mount is denied because the NTFS volume is already exclusively opened.
The volume may be already mounted, or another software may use it which
could be identified for example by the help of the ‘fuser‘ command.
root@ubuntu:~# fuser -m /dev/sdb1   #在占用的进程号？不懂
/dev/sdb1:            3437
root@ubuntu:~# ls /media/nicole   #发现自动挂到这里了  
544YDD  Ubuntu 14.04.5 LTS i386
root@ubuntu:~# cp -r /media/nicole/544YDD/oldpc/SMART.txt  /mnt/empty
root@ubuntu:~# ls /mnt/empty
SMART.txt

root@ubuntu:~# umount /media/nicole
umount：/media/xrisk123：未挂载
root@ubuntu:~# umount /media/nicole/544YDD
root@ubuntu:~# ls /media/nicole
Ubuntu 14.04.5 LTS i386        #u盘不见了