I have a tar file that contains some files in a folder named old_name. Now I'd like to create a new tar file where that folder has been renamed to new_name without extracting to file to disk as that would be significantly slower for large archives (More than double the disk reads and writes).
I know how to do that: tar -xf old.tar; tar -cf new.tar --transform 's/old_name/new_name/' old_name

I've tried a few things but none seemed to work:

• tar -cOf old.tar | tar -xf new.tar --transform 's/old_name/new_name/'
• cat old.tar | tar --delete --transform 's/old_name/new_name/' > new.tar
• cat old.tar | tar -u --transform 's/old_name/new_name/' > new.tar

But nothing seems to work.

I have a tar file that contains some files in a folder named old_name. Now I'd like to create a new tar file where that folder has been renamed to new_name without extracting to file to disk as that would be significantly slower for large archives (More than double the disk reads and writes).
I know how to do that: tar -xf old.tar; tar -cf new.tar --transform 's/old_name/new_name/' old_name

I've tried a few things but none seemed to work:

• tar -cOf old.tar | tar -xf new.tar --transform 's/old_name/new_name/'
• cat old.tar | tar --delete --transform 's/old_name/new_name/' > new.tar
• cat old.tar | tar -u --transform 's/old_name/new_name/' > new.tar

But nothing seems to work.

Closed I've found are these:

• https://stackoverflow.com/q/31716185/1996022
• Efficiently remove file(s) from large .tgz

But those are about removing files in the tarball, not changing their paths.