Under Linux there is a small utility that allows you directly to verify file integrity by comparison. It is call md5sum
that calculates the md5 sum of a file.
- You will often notice that for some sites the md5sum of a file available with the download linl.
- Once you've downloaded your file, just type in a shell:
- And you will get the md5sum of the file and from there you can compare with that offered by the site. It ensures the integrity of a download.
- This concept can be used in the same way to check if your CD has been successfully burned.
- Simply by comparing the .iso file to the burned CD.
- Note that under Linux you have direct access your devices through the /dev directory
- In this directory, the CDs are often represented by their ide path:
- /dev/hdX(where X is the letter of the location of the cdrom on the ide layer)
- The master of the first layer is /dev/hda
- The slave of this layer is /dev/hdb
- The master of the second layer is /dev/hdc etc. .....
- But you can also have shortcuts with /dev/cdrom0 /dev/cdrom1 ....
Consider that your burner is the master of the second IDE layer:/dev/hdc
- After burning your iso image, you just have to do a sum on your iso file:
- And compared with the sum of your burned CD:
- If the md5sum is the same for both, then your burn is successful.