How do I extract tar or tar.gz files?
Base images are compressed as tar or tar.gz files and must be extracted before they are installed.
If you have the gunzip utility, download the tar.gz file and run the command gunzip -c packagename.tar.gz | tar -xvf.
For example: gunzip -c Java14.sdk.tar.gz | tar -xvf.
To extract the tar file, run the command tar -xvf packagename.tar.
For example: tar -xvf Java14.sdk.tar.
Thys Michels Blog 