/usr/share/texmf/source/latex209/base/ is in latex209-src 25.mar.1992-15.
This file is owned by root:root, with mode 0o755.
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/usr/share/texmf/source/latex209/base/art10.doc
/usr/share/texmf/source/latex209/base/art11.doc
/usr/share/texmf/source/latex209/base/art12.doc
/usr/share/texmf/source/latex209/base/article.doc
/usr/share/texmf/source/latex209/base/bezier.doc
/usr/share/texmf/source/latex209/base/bk10.doc
/usr/share/texmf/source/latex209/base/bk11.doc
/usr/share/texmf/source/latex209/base/bk12.doc
/usr/share/texmf/source/latex209/base/book.doc
/usr/share/texmf/source/latex209/base/fleqn.doc
/usr/share/texmf/source/latex209/base/ifthen.doc
/usr/share/texmf/source/latex209/base/leqno.doc
/usr/share/texmf/source/latex209/base/letter.doc
/usr/share/texmf/source/latex209/base/makeidx.doc
/usr/share/texmf/source/latex209/base/openbib.doc
/usr/share/texmf/source/latex209/base/proc.doc
/usr/share/texmf/source/latex209/base/rep10.doc
/usr/share/texmf/source/latex209/base/rep11.doc
/usr/share/texmf/source/latex209/base/rep12.doc
/usr/share/texmf/source/latex209/base/report.doc
/usr/share/texmf/source/latex209/base/showidx.doc
/usr/share/texmf/source/latex209/base/slides.doc
/usr/share/texmf/source/latex209/base/titlepag.doc
/usr/share/texmf/source/latex209/base/twocolum.doc