On Fri, Feb 10, 2017 at 2:54 PM, yamada yohei <yamadayo...@gmail.com> wrote: > Why we have to specify -z -j -a -Z or -J when decompress tar ball? > Why doesn't tar distinguish them automatically? (It should achieve > using file(1) or magic(5) database.) I cannot remember all these > options and always use pipeline e.g. bzcat | tar x. I don't sltar to > have these useless options. >
It shouldn't. Out of distasteful curiousity which tar implementation uses file(1) ? Nothing prevents you to write a shellscript wrapper to use file(1), but it is a bad idea anyway. You can't remember the options to extract a tarball? OK
