Comment 2 for bug 1242373

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DuplicateSignature: package:coreutils:8.13-3ubuntu3.2
[modified: usr/bin/dircolors]:ErrorMessage: Link zur Sicherung von »./usr/bin/csplit« vor Installation der neuen Version kann nicht angelegt werden: Die Operation ist nicht erlaubt
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First of all, let's translate this German text to English: (only a minority will speak German here)

It says that the (sym)link to backup ./usr/bin/csplit cannot be created, permission denied.

The "bug" seems that there is a dot before the /usr, which denotes "search /usr/bin/csplit from current directory".

A dirty workaround might be to work directly from / (root) directory, because then even ./usr/bin/csplit will refer to the physical /usr/bin/csplit directory.