xz -cd foo.txz | wc -l
for i in *.txz; do echo $i; xz -cd $i | wc; done
tar cJvf foo.txz foo
cat foo.tgz | gzip -cd | xz > foo.txz
To do the other way around
cat foo.txz | xz -cd | gzip > foo.tgz
Ref:- http://lowfatdaemon.blogspot.com/2012/01/how-to-repackage-txz-to-tgz-slackware.html
tags | change compression algorithm of a tar archive