18 lines
890 B
Text
18 lines
890 B
Text
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Scrub iteratively writes patterns on files or disk devices to make retrieving
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the data more difficult. Scrub operates in one of three modes:
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1. The special file corresponding to an entire disk is scrubbed and
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all data on it is destroyed. This mode is selected if file is a
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character or block special file. This is the most effective method.
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2. A regular file is scrubbed and only the data in the file (and optionally
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its name in the directory entry) is destroyed. The file size is rounded up
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to fill out the last file system block. This mode is selected if file is a
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regular file.
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3. A file is created, expanded until the file system is full, then scrubbed as
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in item 2. This mode is selected with the -X option.
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Scrub implements user-selectable pattern algorithms that are compliant with
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DoD 5520.22-M or NNSA NAP-14.x.
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WWW: http://www.llnl.gov/linux/scrub/scrub.html
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