On 2024-08-23 you wrote:
root@INF-DESKTOP:/tmp# GZIP=-1 tar cfz saved.config.tar.gz saved.config gzip: warning: GZIP environment variable is deprecated; use an alias or script
Yes, that's the intended and documented behavior. The GZIP environment variable can make it hard to write portable scripts, as they have to unset GZIP to be safe. The intent is that gzip remove support for that variable in a future release.
You can work around the problem by using this shell command instead: tar -I'gzip -1' -cf saved.config.tar.gz saved.config
