-p, -- pretent Run but do not make any changes

General Options:
    -p, --pretend                    Run but do not make any changes.
    -f, --force                      Overwrite files that already exist.
    -s, --skip                       Skip files that already exist.
    -q, --quiet                      Suppress normal output.

Read more: http://hacksignal.posterous.com/#ixzz0EistICJg&B

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