Usb flash memory can't work

esraam · 06-09-2015, 07:40 AM

Quote:

Originally Posted by rtmistler

After the point where you issued that command, you can then re-issue just "mount" and that will show you a list of what is mounted versus not. The presumption is that you'll see something similar to:

Code:

/dev/sdd1 on /mnt type vfat (bunch of other stuff)

If you do not, then the mount command did not succeed. If you do see that it is mounted on /mnt and when you perform an "ls" command there's nothing shown in /mnt, then it may be that the USB drive is empty. Do you know that there are any files on that USB drive? Note you can also use the "df" command to ascertain how much data is on a particular drive and partition:

Code:

df /dev/sdd
df /dev/sdd1

You can also use the "du" command to determine how large the information is on a given mounted drive:

Code:

du -S /dev/sdd1

If that shows as zero, then there are simply no files there. The first thing to do is verify that the mount succeeded. I'm assuming there was no error report after the mount command?

#mount
it gave :

/dev/sdd1 on mnt type vfat (rw)

# ls :
gave nothing

#df /dev/sdg1 ( name changes on unplugging and re-plugging )
gave:
File System 1k-block used Available Use% Mounted on
/dev/sdg1 7813184 476 7812708 1% /mnt
I need to copy a file from linux system to the flash drive .
how can I do so ?

rtmistler · 06-09-2015, 07:44 AM

Quote:

Originally Posted by esraam

#mount
it gave :

/dev/sdd1 on mnt type vfat (rw)

# ls :
gave nothing

I need to copy a file from linux system to the flash drive .
how can I do so ?

Looks like it's mounted and there are simply no files on that drive.

Copy using either the File Manager or the cp command.

esraam · 06-09-2015, 07:46 AM

Quote:

Originally Posted by rtmistler

Looks like it's mounted and there are simply no files on that drive.

Copy using either the File Manager or the cp command.

assuming i have a file called log.txt on the following directory :
/em/htk

What line can copy this file to the drive ?

OR using file manager ?
How?
I am unable to open the folder of the drive to paste in ?

rtmistler · 06-09-2015, 07:53 AM

Code:

cp log.txt /mnt/.

OR:

Code:

sudo cp log.txt /mnt/.

esraam · 06-09-2015, 07:54 AM

What does umount -a does ?

esraam · 06-09-2015, 08:04 AM

Quote:

Originally Posted by rtmistler

Code:

cp log.txt /mnt/.

OR:

Code:

sudo cp log.txt /mnt/.

Isn't there any method to open the flash drive folder using the GUI ?
I wrote the above #cp command
How can I know if the file was copied or not ?
How can I open the flash folder ?

veerain · 06-10-2015, 07:31 AM

Quote:

Disk /dev/sde: 8021 MB

Above means a device with 8021MB(8GB) of space present.

Quote:

/dev/sde1 * 51 97920 7829568 b W95 FAT32

Above means a partition 'sde1' present in device 'sde' With FAT32 filesystem.

So you mount with:

Code:

sudo mount -t vfat /dev/sde1 /mnt
ls -l /mnt

veerain · 06-10-2015, 07:36 AM

Quote:

umount -a

Read man page of 'mount'. Above command unmounts all the filesystem listed in '/etc/fstab'.

Quote:

How can I know if the file was copied or not ?

You can use the 'ls' command for the destination directory to see it got copied.