/usr/ is in libftp-dev 4.0-1-3.
This file is owned by root:root, with mode 0o755.
..
/usr/include/
/usr/share/doc/libftp-dev/examples/ftpdir
/usr/share/doc/libftp-dev/examples/ftpget
/usr/share/doc/libftp-dev/examples/ftplist
/usr/share/doc/libftp-dev/examples/ftprm
/usr/share/doc/libftp-dev/examples/ftpsend
/usr/include/ftplib.h
/usr/lib/
/usr/lib/libftp-dev/
/usr/lib/libftp-dev/examples/
/usr/lib/libftp-dev/examples/qftp
/usr/lib/x86_64-linux-gnu/
/usr/lib/x86_64-linux-gnu/libftp.a
/usr/share/
/usr/share/doc/
/usr/share/doc/libftp-dev/
/usr/share/doc/libftp-dev/README.Debian
/usr/share/doc/libftp-dev/README.ftplib-4.0-1
/usr/share/doc/libftp-dev/README.qftp
/usr/share/doc/libftp-dev/copyright
/usr/share/doc/libftp-dev/examples/
/usr/share/doc/libftp-dev/examples/Makefile
/usr/share/doc/libftp-dev/examples/qftp.c
/usr/share/doc/libftp-dev/html/
/usr/share/doc/libftp-dev/html/FtpAccess.html
/usr/share/doc/libftp-dev/html/FtpCDUp.html
/usr/share/doc/libftp-dev/html/FtpChdir.html
/usr/share/doc/libftp-dev/html/FtpClearCallback.html
/usr/share/doc/libftp-dev/html/FtpClose.html
/usr/share/doc/libftp-dev/html/FtpConnect.html
/usr/share/doc/libftp-dev/html/FtpDelete.html
/usr/share/doc/libftp-dev/html/FtpDir.html
/usr/share/doc/libftp-dev/html/FtpGet.html
/usr/share/doc/libftp-dev/html/FtpInit.html
/usr/share/doc/libftp-dev/html/FtpLastResponse.html
/usr/share/doc/libftp-dev/html/FtpLogin.html
/usr/share/doc/libftp-dev/html/FtpMkdir.html
/usr/share/doc/libftp-dev/html/FtpModDate.html
/usr/share/doc/libftp-dev/html/FtpNlst.html
/usr/share/doc/libftp-dev/html/FtpOptions.html
/usr/share/doc/libftp-dev/html/FtpPut.html
/usr/share/doc/libftp-dev/html/FtpPwd.html
/usr/share/doc/libftp-dev/html/FtpQuit.html
/usr/share/doc/libftp-dev/html/FtpRead.html
/usr/share/doc/libftp-dev/html/FtpRename.html
/usr/share/doc/libftp-dev/html/FtpRmdir.html
/usr/share/doc/libftp-dev/html/FtpSetCallback.html
/usr/share/doc/libftp-dev/html/FtpSite.html
/usr/share/doc/libftp-dev/html/FtpSize.html
/usr/share/doc/libftp-dev/html/FtpSizeLong.html
/usr/share/doc/libftp-dev/html/FtpSysType.html
/usr/share/doc/libftp-dev/html/FtpWrite.html
/usr/share/doc/libftp-dev/html/doc.css
/usr/share/doc/libftp-dev/html/ftplib.html
/usr/share/doc/libftp-dev/html/index.html
/usr/share/doc/libftp-dev/html/qftp.html
/usr/share/doc-base/
/usr/share/doc-base/ftplib-dev
/usr/lib/x86_64-linux-gnu/libftp.so
/usr/share/doc/libftp-dev/changelog.Debian.gz
/usr/share/doc/libftp-dev/examples/README
/usr/share/doc/libftp-dev/examples/qftp