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diff [-ru] file1 file2
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expr [expression]
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id [-ruGgn] username
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printf format [argument...]
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test [expression...]
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tr:
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support for character classes [:alnum:]
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od/hd
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uuencode, uudecode:
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missing options for base64
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sed
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patch
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ed
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awk
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bc/dc
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fmt
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install
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find (bare minimum)
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at
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