Archive format defined by POSIX.1-1988 specification is called
ustar. Although it is more flexible than the V7 format, it
still has many restrictions (See ustar, for the detailed
description of ustar format). Along with V7 format,
ustar format is a good choice for archives intended to be read
with other implementations of tar.
To create archive in ustar format, use --format=ustar
option in conjunction with the --create (-c).
Published under the terms of the GNU General Public License