tar: defaults

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1 3.6 Obtaining GNU 'tar' default values
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1 
1 GNU 'tar' has some predefined defaults that are used when you do not
1 explicitly specify another values.  To obtain a list of such defaults,
1 use '--show-defaults' option.  This will output the values in the form
1 of 'tar' command line options:
1 
1      $ tar --show-defaults
1      --format=gnu -f- -b20 --quoting-style=escape
1      --rmt-command=/etc/rmt --rsh-command=/usr/bin/rsh
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1 Notice, that this option outputs only one line.  The example output
1 above has been split to fit page boundaries.
1 
1 The above output shows that this version of GNU 'tar' defaults to using
1 'gnu' archive format (⇒Formats), it uses standard output as the
1 archive, if no '--file' option has been given (⇒file tutorial),
1 the default blocking factor is 20 (⇒Blocking Factor).  It also
1 shows the default locations where 'tar' will look for 'rmt' and 'rsh'
1 binaries.
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