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I am new to Linux and I have installed recently ubuntu 14.04. I have an .img file of 2GB and I want to make my flash disk bootable with this image.

I used the command:

dd if=xxx.img of=/dev/sdb1 

after running

fdisk -l 

which shows that my flash disk partition is /dev/sdb1.

After finishing the operation, I have the message of records in and out and 2GB are in the flash disk.

The problem is after ejecting the flash and mounting it again it is no longer detected. Moreover, the filesystem is changed to raw and I get the message of input/output error. The flash disk still appears in the fdisk -l.

Actually, I want to enter to its files and make some modifications on ̀menu.lst̀ Could anybody help me please, I get the same result for Ubuntu 13.04 and 12.04 Thanks.

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