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It is for this reason that many Linux, BSD, or other free operating systems are distributed for download using an ISO image—file permissions and other filesystem metadata is not lost in the transfer. Also, it is possible to loopback mount the image under many of these systems to access the individual files. The ISO 9660 is specified as read-only; currently you cannot modify the content when mounting an ISO file. The loopback mount gives you read access only. However, there are special tools that will allow you to modify an ISO file.
After downloading, one can burn this image to a CD. If the burned CD includes an operating system that doesn't need to be installed to the hard disk (this is, can be used from the CD), it is called a LiveCD. LiveCDs are bootable . Such an example of these are the Gnoppix, Knoppix, Mepis and Morphix Linux distributions.
There are many different ISO image formats to choose from. The most common include the .cue/.bin and .iso image formats.
The .iso format is a single data file containing all the data in the image. It is the most common format used, especially in the distribution of linux operating systems software.
The .cue / .bin format developed by Jeff Arnold for CDRWIN can encode CD Image formats in either 2048 or 2324 bytes per sector. The .bin file is a BINary copy of an entire CD/DVD disc. The BIN file contains all the data stored on the original disc including not only its files and folders but also its system-specifics information, for example, bootable information, volume, volume attributes and any other system-specific data. BIN files are usually bigger than .iso files because in contrast to .iso files they are not a bit for bit copy of the entire CD/DVD.
The .cue file is a datasheet that describes the data stored in the .bin file. The .cue file is in fact a plain text file. A typical .cue file is as follows:
FILE "IMAGE.BIN" BINARY TRACK 01 MODE1/2352 INDEX 01 00:00:00
The file would be saved as IMAGE.CUE
See also: Disk imageA disk image is a computer file containing the complete contents and structure of a data storage device. The term has been generalized to cover any such file, whether taken from an actual physical storage device or not. An ordinary backup only backs up th, Nero Burning ROMNero Burning ROM is a popular computer program for writing CDs and DVDs, created by Ahead Software. Its name is intended to be a joke about the Roman Emperor Nero who is said to have played his Lyre as Rome burned. This joke is more obvious in the origina