Hi Gustavo,
you have to install the Gzip 1.6 package from RocketSoftware first. Gzip 1.6 is in tar-format available. You can ‘untar’ this in USS as usual.
I think .gz stands for gzip format (for z/OS ?, I don’t know )
The gzip and tar process for RocketSoftware z/OS Open Source Community Downloads is described in the install guide (rocket_zos_open_source_tools_installation_guide.pdf):
Enter the following command to expand the compressed file: gzip –d filename.tar.gz
Enter the following command to install the Ported Tool: tar –xvfo filename.tar
Hope this helps.
regards
Hermann Buerchler
IBM Switzerland