How do I mount a partition that is in an image file? I have a file called centos.img that has 3 partitions in the file. I need to copy data to the third partition on that image file. I have seen things about a loop back device (which is fine) but then it talked about an offset parameter and I dont know what that is or more importantly what number to use. I hope I'm on the right track. How do I mount it? THanks, Jerry