I have recently downloaded the Ubuntu 14.04 iso file via torrent. After downloading, I checked the MD5 sum of the downloaded .iso file and it was correct. Then I created bootable USB drive using the Startup Disk Creator application.

I tried to find the MD5 sum using the command md5sum /dev/sdc1 but the terminal returned md5sum: /dev/sdc1: Permission denied. I am attaching the snapshot of the permissions tab of my USB drive to help you guys figure out what's wrong.

Permissions tab of USB drive

Update 1: I tried to install Ubuntu 14.04 from that USB drive. But only a black screen showed up with the message Boot Error. Why is this happening? What should I do to rectify this problem?


Same way you checked the iso

md5sum /dev/sdb1

change sdb1 to your flash drive.

See: https://help.ubuntu.com/community/HowToMD5SUM for additional information.

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