ustar (GNU tar 1.35)

#### 8.3.5 Ustar Archive Format

The archive format defined by the 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 an archive in `ustar` format, use the `--format=ustar` option in conjunction with `--create` (`-c`).