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.
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?