I recently compressed a tar.gz file and thought that I can compress it down further by compressing the tar.gz file into a new one.
What I ran to compress it:
tar -czvf world.tar.gz world/
Then I did:
tar -czvf world.tar.gz world.tar.gz
Now I cannot extract it using the normal command because it gives this error:
gzip: stdin: not in gzip format tar: Child returned status 1 tar: Error is not recoverable: exiting now