/usr/share/icons/hicolor/128x128/ is in hicolor-icon-theme 0.15-0ubuntu1.
This file is owned by root:root, with mode 0o755.
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/usr/share/icons/hicolor/128x128/actions/
/usr/share/icons/hicolor/128x128/animations/
/usr/share/icons/hicolor/128x128/apps/
/usr/share/icons/hicolor/128x128/categories/
/usr/share/icons/hicolor/128x128/devices/
/usr/share/icons/hicolor/128x128/emblems/
/usr/share/icons/hicolor/128x128/emotes/
/usr/share/icons/hicolor/128x128/filesystems/
/usr/share/icons/hicolor/128x128/intl/
/usr/share/icons/hicolor/128x128/mimetypes/
/usr/share/icons/hicolor/128x128/places/
/usr/share/icons/hicolor/128x128/status/
/usr/share/icons/hicolor/128x128/stock/
/usr/share/icons/hicolor/128x128/stock/chart/
/usr/share/icons/hicolor/128x128/stock/code/
/usr/share/icons/hicolor/128x128/stock/data/
/usr/share/icons/hicolor/128x128/stock/form/
/usr/share/icons/hicolor/128x128/stock/image/
/usr/share/icons/hicolor/128x128/stock/io/
/usr/share/icons/hicolor/128x128/stock/media/
/usr/share/icons/hicolor/128x128/stock/navigation/
/usr/share/icons/hicolor/128x128/stock/net/
/usr/share/icons/hicolor/128x128/stock/object/
/usr/share/icons/hicolor/128x128/stock/table/
/usr/share/icons/hicolor/128x128/stock/text/