What error message do you get? We need more specifics to help you.

Also, you can change your call to ls to use Perl's globbing operator instead:

@list = <*.tar>;
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And you can use Archive::Tar instead of calling tar:

foreach $file (@list) {
    use Archive::Tar;
    $tar = Archive::Tar->new;
    $tar->read( $file );
    $tar->extract();
    
}
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Pure Perl solutions are generally faster and safer than calling external programs, though perhaps a bit longer in some cases.