Currently we do not have MD5 (or any other hash-based) checksums for the images, but you can overcome this problem with a little magic. You have to download the ISO image (for example sarge-i386-1.iso) and the appropriate jigdo template file (for example jigdo/sarge-i386-1.template). To get the checksum of the .iso file, you have to issue the following command under a GNU/Linux system: tail --bytes=26 sarge-i386-1.template | head --bytes=16 | od -tx1 -An | \ sed -e 's/ //g' For BSD systems, try to use this: tail -c 26 sarge-i386-1.template | head -c 16 | od -tx1 -An | sed -e 's/ //g' Then, you will get the MD5 checksum of the ISO image. .