-z, --gunzip, --gzip
(c mode only) Compress the resulting archive with gzip(1). In extract or list modes, this option
is ignored. Note that, unlike other tar implementations, this implementation recognizes gzip
compression automatically when reading archives.
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-f file, --file file
Read the archive from or write the archive to the specified file. The filename can be - for
standard input or standard output. The default varies by system; on FreeBSD, the default is
/dev/sa0; on Linux, the default is /dev/st0.
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