/usr/share/texlive/texmf-dist/bibtex/csf/ is in texlive-extra-utils 2016.20170123-5.
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/usr/share/texlive/texmf-dist/bibtex/csf/base/
/usr/share/texlive/texmf-dist/bibtex/csf/base/88591lat.csf
/usr/share/texlive/texmf-dist/bibtex/csf/base/88591sca.csf
/usr/share/texlive/texmf-dist/bibtex/csf/base/README.TEXLIVE
/usr/share/texlive/texmf-dist/bibtex/csf/base/ascii.csf
/usr/share/texlive/texmf-dist/bibtex/csf/base/cp437lat.csf
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/usr/share/texlive/texmf-dist/bibtex/csf/base/csfile.txt
/usr/share/texlive/texmf-dist/bibtex/csf/polish-csf/
/usr/share/texlive/texmf-dist/bibtex/csf/polish-csf/88592pl.csf
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/usr/share/texlive/texmf-dist/bibtex/csf/polish-csf/iso8859-7.csf