/usr/ is in libcommons-net-java 3.4-2ubuntu2.
This file is owned by root:root, with mode 0o755.
..
/usr/share/
/usr/share/maven-repo/
/usr/share/maven-repo/commons-net/
/usr/share/maven-repo/commons-net/commons-net/
/usr/share/maven-repo/commons-net/commons-net/3.4/
/usr/share/maven-repo/commons-net/commons-net/3.4/commons-net-3.4.pom
/usr/share/maven-repo/commons-net/commons-net/debian/
/usr/share/maven-repo/commons-net/commons-net/debian/commons-net-debian.pom
/usr/share/doc/
/usr/share/doc/libcommons-net-java/
/usr/share/doc/libcommons-net-java/changelog.Debian.gz
/usr/share/doc/libcommons-net-java/NOTICE.txt
/usr/share/doc/libcommons-net-java/README
/usr/share/doc/libcommons-net-java/copyright
/usr/share/doc/libcommons-net-java/README.Debian
/usr/share/java/
/usr/share/java/commons-net-3.4.jar
/usr/share/maven-repo/commons-net/commons-net/3.4/commons-net-3.4.jar
/usr/share/maven-repo/commons-net/commons-net/debian/commons-net-debian.jar
/usr/share/java/commons-net.jar