jcat shows the contents of a journal block in the file system journal. The inode address of the journal can be given or the default location will be used. Note that the block address is a journal block address and not a file system block. The raw output is given to STDOUT. It is a part of The Sleuth Kit (previously known as TASK) is a collection of UNIX-based command  line file and volume system forensic analysis tools. The file system tools allow you to examine file systems of a suspect computer in a non-intrusive  fashion. Because the tools do not rely on the operating system to process the  file systems, deleted and hidden content is shown. The volume system (media management) tools allow you to examine the layout of  disks and other media. The Sleuth Kit supports DOS partitions, BSD partitions  (disk labels), Mac partitions, Sun slices (Volume Table of Contents), and GPT
disks. With these tools, you can identify where partitions are located and  extract them so that they can be analyzed with file system analysis tools.



 jcat [-f fstype] [-i imgtype] [-b dev_sector_size] [-o imgoffset] [-vV] image [images] [inode] blk


        blk: The journal block to view jcat 
	inode: The file system inode where the journal is located
	-i imgtype: The format of the image file (use '-i list' for supported types)
	-b dev_sector_size: The size (in bytes) of the device sectors
	-f fstype: File system type (use '-f list' for supported types)
	-o imgoffset: The offset of the file system in the image (in sectors)
	-v: verbose output to stderr
	-V: print version jcat 


cyborg@cyborg:~$ sudo jcat -v  /dev/sdb1 2
tsk_img_open: Type: 0   NumImg: 1  Img1: /dev/sdb1
fsopen: Auto detection mode at offset 0
raw_read: byte offset: 0 len: 65536
raw_read: byte offset: 65536 len: 65536
raw_read: byte offset: 262144 len: 65536
iso9660_open img_info: 19456768 ftype: 2048 test: 1

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