tar and bzip extract from CD

phenrichs · 12-05-2007, 02:39 PM

I am putting files on DVD/CD. I use tar with the bzip2 option to archive and compress the files. I then burn to the disc. When trying to extract directly from the disc I get an error from bzip2 stating that file system is read-only, which makes sense because the dvdrom drive is read-only.

What is the option / syntax to extract directly from the disc and redirect the output of the extraction to a specific folder?

David1357 · 12-05-2007, 03:50 PM

Quote:

Originally Posted by phenrichs

...I get an error from bzip2 stating that file system is read-only, which makes sense because the dvdrom drive is read-only.

Are you running bzip2 while you are in a directory on the CD-ROM? If so, it may not work because bzip2 is trying to create a local temporary file. You should run bzip2 in a directory on your target filesystem.

phenrichs · 12-05-2007, 04:24 PM

Right, that makes sense. So how do I tell it where to put the files that it unzips. I tried tar -xvjf export.tar.bz2 /<path to desired directory> but this gives me a message that /<path> does not exist in archive.

It seems that I have the syntax off.

Oh and thanks in advance helping.

LinuxCrayon · 12-05-2007, 06:12 PM

While I haven't tried with a removable media, this is what has worked for me to extract to a specific directory. Say 'file1.tar' exists in directory 'tarred/'. I want to extract its contents to directory 'untarred/'. Both folders are located in '/test'. So the absolute paths are '/test/tarred/' and '/test/untarred/', respectively.

Code:

cd /test/untarred/
tar xvf /test/tarred/file1.tar

Also, I could have used

Code:

cd /test/untarred/
tar xvf ../tarred/file1.tar

for the same result. Hope that helps!

gilead · 12-05-2007, 06:44 PM

You can specify both the source and the output directories on the tar command line:

Code:

tar -xjf /path/to/file/tripwire/tripwire-2.4.1.2-src.tar.bz2 -C ~/tmp

The output of the above command ends up in ~/tmp/tripwire-2.4.1.2-src