The "Device is busy" problem that occurs when Umount is resolved under Linux __linux

fuser can show which program is currently using a file on disk, mount point, or even network port, and give details of the program process. If the device that cannot be unloaded is/media/matlab, run the following command:

$ sudo fuser-m-v/media/matlab/
                       user     process number    permission   command
/media/matlab/:        galeki      335    . C..  Gqview
$ sudo umount/media/matlab

#-m parameter shows all processes using the specified file system, followed by the mount point, or the dev device
#-v parameter gives detailed output, you can see that the original is Gqview This program is still hogging the mobile device # Fuser also gave the process number of the
program, know the process number, you can dispose of the program as a matter of

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# In addition you can also add a-K parameter:
$ sudo fuser-m-k/media/matlab/         # This trick automatically occupies the/media/ matlab/program kills
$ sudo umount/media/matlab

# If you're not sure if you're going to kill all the device-hogging programs, you can also add a-I argument so that every program that kills one will ask:
$ sudo fuser-m-v-i-k/media/matlab/
                          user     process number      permission   command
/media/matlab/:         galeki      371     .. C..   Gqview
kills process 371? (y/n)
$ sudo umount/media/matlab

Very smooth solution of the "Device is busy" problem ~