/usr/ is in elpa-rainbow-delimiters 2.1.3-1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/
/usr/lib/emacsen-common/
/usr/lib/emacsen-common/packages/
/usr/lib/emacsen-common/packages/compat/
/usr/lib/emacsen-common/packages/compat/elpa-rainbow-delimiters
/usr/lib/emacsen-common/packages/install/
/usr/lib/emacsen-common/packages/install/elpa-rainbow-delimiters
/usr/lib/emacsen-common/packages/remove/
/usr/lib/emacsen-common/packages/remove/elpa-rainbow-delimiters
/usr/share/
/usr/share/doc/
/usr/share/doc/elpa-rainbow-delimiters/
/usr/share/doc/elpa-rainbow-delimiters/README.md
/usr/share/doc/elpa-rainbow-delimiters/changelog.Debian.gz
/usr/share/doc/elpa-rainbow-delimiters/copyright
/usr/share/emacs/
/usr/share/emacs/site-lisp/
/usr/share/emacs/site-lisp/elpa-src/
/usr/share/emacs/site-lisp/elpa-src/rainbow-delimiters-2.1.3/
/usr/share/emacs/site-lisp/elpa-src/rainbow-delimiters-2.1.3/rainbow-delimiters-autoloads.el
/usr/share/emacs/site-lisp/elpa-src/rainbow-delimiters-2.1.3/rainbow-delimiters-pkg.el
/usr/share/emacs/site-lisp/elpa-src/rainbow-delimiters-2.1.3/rainbow-delimiters-test.el
/usr/share/emacs/site-lisp/elpa-src/rainbow-delimiters-2.1.3/rainbow-delimiters.el