gunzip: sfx_archive.tar.gz: not in gzip format
If you see this error, something went wrong during the transfer process of the installer. The easiest way to confirm this is to calculate the MD5 of the installer you're attempting to run, and compare it to the MD5 hash listed on our Hub site. Most likely this occurred if the file was transferred in ASCII mode instead of binary mode, particularly if SCP/SFTP was used.
To resolve the issue, transfer the file again, and explicitly specifying binary mode.