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@@ -6274,11 +6274,12 @@ contiguous files as such. Let's discuss a few more problems, in turn.
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@node Portable Names, dereference, Portability, Portability
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@subsection Portable Names
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-Use @emph{straight} file and directory names, made up of printable
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-ASCII characters, avoiding colons, slashes, backslashes, spaces, and
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-other @emph{dangerous} characters. Avoid deep directory nesting.
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-Accounting for oldish System V machines, limit your file and directory
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-names to 14 characters or less.
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+Use portable file and member names. A name is portable if it contains
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+only ASCII letters and digits, @samp{/}, @samp{.}, @samp{_}, and
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+@samp{-}; it cannot be empty, start with @samp{-} or @samp{//}, or
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+contain @samp{/-}. Avoid deep directory nesting. For portability to
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+old Unix hosts, limit your file name components to 14 characters or
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+less.
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If you intend to have your @code{tar} archives to be read under MSDOS,
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you should not rely on case distinction for file names, and you might
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Paul Eggert