system commands are generally the last resort.

Also a lot easier to read and less prone to warnings:
die "$ARGV[0] doesn't exist" unless @ARGV && -e $ARGV[0];

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In reply to Re: Why does system("mv $x $y") not work when it works at the command line? by misterperl
in thread Why does system("mv $x $y") not work when it works at the command line? by Cody Fendant

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