The sm_migrate has seven command-line options:
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--old (or -o)
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--new (or -n)
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--archive (or -a)
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--upgrade (or -u)
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--rollback (or -r)
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--silent (or -s)
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--sitemod (or -l)
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--help (or -h)
These command-line options can be used in pairs in the command line to achieve eight different modes of operation described below.