decompress .dat file

cccc · 12-28-2009, 11:52 AM

Hi

Howto decompress (uncompress), edit some files and compress again a ramdisk.dat file?

rweaver · 12-28-2009, 04:47 PM

What do you get when you do a

Code:

file -i ramdisk.dat 

or

file -s ramdisk.dat

There are a lot of ways to generate a file like ramdisk.dat (dd, acronis, etc.) and depending on what you're using and how can make fairly drastic difference in the answer to your question.

cccc · 12-28-2009, 05:19 PM

Code:

# file -s ramdisk.dat
ramdisk.dat: gzip compressed data, was "ramdisk.dat.initrd", from FAT filesystem (MS-DOS, OS/2, NT), last modified: Sun Oct 19 02:00:20 2008
# file -i ramdisk.dat
ramdisk.dat: application/x-gzip

cccc · 12-30-2009, 07:04 PM

I can uncompress using tar on freeBSD:

Code:

# tar xvzf ramdisk.dat -C /mnt/tmp

but it doesn't work on Debian:

Code:

# tar xvzf ramdisk.dat -C /home/ramdisk/tmp
tar: This does not look like a tar archive
tar: Skipping to next header
tar: Error exit delayed from previous errors