Package: perforate Version: 1.2-5.1 Followup-For: Bug #294297 I don’t think there’s much zum can do: sparseness is not something that file systems advertise. Putting the information in zum’s man page would inevitably lead to its being incomplete and/or out of date.
zum is a low-level tool, so really should only be used with an understanding of the underlying file system. -- System Information: Debian Release: stretch/sid APT prefers xenial-updates APT policy: (500, 'xenial-updates'), (500, 'xenial-security'), (500, 'xenial'), (100, 'xenial-backports') Architecture: amd64 (x86_64) Foreign Architectures: i386 Kernel: Linux 4.10.0-32-generic (SMP w/4 CPU cores) Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8) Shell: /bin/sh linked to /bin/dash Init: systemd (via /run/systemd/system) Versions of packages perforate depends on: ii libfile-slurp-perl 9999.19-4 ii libstring-shellquote-perl 1.03-1.2 ii libyaml-perl 1.15-1 perforate recommends no packages. perforate suggests no packages. -- no debconf information