/usr/ is in claws-mail-tools 3.13.2-1ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/
/usr/share/doc/
/usr/share/doc/claws-mail-tools/
/usr/share/doc/claws-mail-tools/copyright
/usr/share/doc/claws-mail-tools/README.gz
/usr/share/doc/claws-mail/
/usr/share/doc/claws-mail/tools/
/usr/share/doc/claws-mail/tools/calypso_convert.pl
/usr/share/doc/claws-mail/tools/kmail-mailbox2claws-mail.pl
/usr/share/doc/claws-mail/tools/eud2gc.py
/usr/share/doc/claws-mail/tools/gif2xface.pl
/usr/share/doc/claws-mail/tools/kmail2claws-mail.pl
/usr/share/doc/claws-mail/tools/popfile-link.sh
/usr/share/doc/claws-mail/tools/multiwebsearch.conf
/usr/share/doc/claws-mail/tools/filter_conv_new.pl
/usr/share/doc/claws-mail/tools/mairix.sh
/usr/share/doc/claws-mail/tools/mew2claws-mail.pl
/usr/share/doc/claws-mail/tools/thunderbird-filters-convertor.pl
/usr/share/doc/claws-mail/tools/google_search.pl
/usr/share/doc/claws-mail/tools/acroread2claws-mail.pl
/usr/share/doc/claws-mail/tools/claws-mail-compose-insert-files.pl
/usr/share/doc/claws-mail/tools/outlook2claws-mail.pl
/usr/share/doc/claws-mail/tools/csv2addressbook.pl
/usr/share/doc/claws-mail/tools/uuooffice
/usr/share/doc/claws-mail/tools/convert_mbox.pl
/usr/share/doc/claws-mail/tools/kdeservicemenu/
/usr/share/doc/claws-mail/tools/kdeservicemenu/claws-mail-attach-files.desktop.kde4template
/usr/share/doc/claws-mail/tools/kdeservicemenu/claws-mail-attach-files.desktop.template
/usr/share/doc/claws-mail/tools/kdeservicemenu/claws-mail-kdeservicemenu.pl
/usr/share/doc/claws-mail/tools/kdeservicemenu/README
/usr/share/doc/claws-mail/tools/kdeservicemenu/install.sh
/usr/share/doc/claws-mail/tools/OOo2claws-mail.pl
/usr/share/doc/claws-mail/tools/filter_conv.pl
/usr/share/doc/claws-mail/tools/kmail2claws-mail_v2.pl
/usr/share/doc/claws-mail/tools/multiwebsearch.pl
/usr/share/doc/claws-mail/tools/tb2claws-mail
/usr/share/doc/claws-mail/tools/textviewer.pl
/usr/share/doc/claws-mail/tools/update-po
/usr/share/doc/claws-mail/tools/tbird2claws.py
/usr/share/doc/claws-mail/tools/vcard2xml.py
/usr/share/doc/claws-mail/tools/textviewer.sh
/usr/share/doc/claws-mail/tools/google_msgid.pl
/usr/share/doc/claws-mail/tools/uudec
/usr/share/doc/claws-mail/tools/nautilus2claws-mail.sh
/usr/share/doc/claws-mail/tools/fix_date.sh
/usr/share/doc/claws-mail-tools/NEWS.gz
/usr/share/doc/claws-mail-tools/RELEASE_NOTES
/usr/share/doc/claws-mail-tools/changelog.Debian.gz