perl系统命令中的“tar cvf fred_flintstone<barney&barney>betty”是做什么的?

qw() "fred|flintstone", "<barney&rubble>", "betty"

tar cvf fred|flintstone <barney&rubble> betty

| < > &

tar cvf fred flintstone

< barney

&

> rubble betty

perldoc perlop

qw/STRING/
           Evaluates to a list of the words extracted out of STRING, using
           embedded whitespace as the word delimiters.  It can be understood
           as being roughly equivalent to:

               split(' ', q/STRING/);

           the differences being that it generates a real list at compile
           time, and in scalar context it returns the last element in the
           list.  So this expression:

               qw(foo bar baz)

           is semantically equivalent to the list:

               'foo', 'bar', 'baz' 

fred|flinstone
<barney&rubble>
betty

@dirs

qw

tar cvf

c - create archive
v - verbose mode
f - use following argument as archive name

$ perl -e 'use Data::Dumper; my @dirs = qw(fred|flintstone <barney&rubble> betty ); print Dumper(@dirs);'

$VAR1 = 'fred|flintstone';
$VAR2 = '<barney&rubble>';
$VAR3 = 'betty';

$ perl -e 'use Data::Dumper; my @dirs = qw(fred|flintstone <barney&rubble> betty ); print Dumper \@dirs;'
$VAR1 = [
          'fred|flintstone',
          '<barney&rubble>',
          'betty'
        ];

Quote_and_Quote_like_Operators