I'm new in Linux, is this conversion possible?
Do I need to compress and decompress all content?
I'm new in Linux, is this conversion possible?
Do I need to compress and decompress all content?
You need to decompress, and then compress.
You can convert like so:
bunzip2 -c -d file.tar.bz2 | gzip -v9 > file.tar.gz
Yes, you need to decompress and compress the content (because compression is not "compositional").