What I am doing:
XZ_OPT='-T0 -9 -vv' tar -vvcJf ~/backup.tar.xz ...FILES
I doubt if
tar really pass the given options, I have tried those things:
- I used
XZ_OPT, but there is no message from
xzin the output, neither
- I also use
ps aux | grep xzto see if
spawnanother process for
xz, but I didn't see that
tarcreate any process.
XZ_OPTenvironment really work? How to verify it?
- Why can't I find
tarreally spawn process to compress files?
$ xz --version xz (XZ Utils) 5.2.5 liblzma 5.2.5 $ tar --version bsdtar 3.3.2 - libarchive 3.3.2 zlib/1.2.11 liblzma/5.0.5 bz2lib/1.0.6