Question

The default behavior of gunzip is to delete the .gz file after it decompresses.

How do I prevent it from deleting the file??

If this functionality is not included then is there an alternative program that allows this?

I'm using Ubuntu 9.04

Answer 1

You're looking for:

gzcat x.txt.gz >x.txt

The gzcat command is equivalent to gunzip -c which simply writes the output stream to stdout. This will leave the compressed file untouched. So you can also use:

gunzip -c x.txt.gz >x.txt

Answer 2

You can the -c option which writes the output to stdout, and then pipe it to the file of your choice:

gunzip -c compressed-file.gz > decompressed-file

More details on the manual page.

Answer 3

Use the -c option to uncompress the file to stdout. It will not touch the original file.

gunzip -c myfile.gz > myfile

Answer 4

If it's actually a tarball (.tgz or .tar.gz extension), then instead of redirecting to file like all of the answers so far, you'll want to pipe it to tar, like so:

gunzip -c myfile.tar.gz | tar xvf -

so that you get the actual contents.

Answer 5

A simpler solution is to just use gunzip as a filter like this:

gunzip < myfile.gz > myfile

Answer 6

Gnu tar can read gzip files: tar -zxsvf myfile.tar.gz or tar -jxzvf myfile.tar.bz2 for bzipped tar files.