cmp command query...
Hello there, last week I used the cmp command because I want to compare the file that I burned in a CD and the original if the same. I used this command: cmp -b /media/cdrom0/filename.txt /home/user/filename.txt. Everything was ok. Now today, when I attempted to compare the two files using the same command, I got an error which is: cmp: /media/cdrom0/filename.txt: input/output error. I'm wondering why this happened, I didn't do anything or changed anything.