dired-guess-shell-gnutardired-guess-shell-gnutar is a variable defined in `
dired-x.el'. Its value is
"tar"Documentation: If non-nil, name of GNU tar executable. (E.g., "tar" or "gtar"). The `z' switch will be used with it for compressed or gzip'ed tar files. If you don't have GNU tar, set this to nil: a pipe using `zcat' or `gunzip -c' will be used. You can customize this variable. This variable was introduced, or its default value was changed, in version 24.1 of Emacs.