/usr/ is in nailgun 0.9.1-3.
This file is owned by root:root, with mode 0o755.
..
/usr/bin/ng-nailgun
/usr/share/java/
/usr/share/
/usr/share/java/nailgun-server.jar
/usr/share/maven-repo/
/usr/share/maven-repo/com/
/usr/share/maven-repo/com/martiansoftware/
/usr/share/maven-repo/com/martiansoftware/nailgun-server/
/usr/share/maven-repo/com/martiansoftware/nailgun-server/0.9.1/
/usr/share/maven-repo/com/martiansoftware/nailgun-server/0.9.1/nailgun-server-0.9.1.pom
/usr/share/maven-repo/com/martiansoftware/nailgun-server/debian/
/usr/share/maven-repo/com/martiansoftware/nailgun-server/debian/nailgun-server-debian.pom
/usr/share/maven-repo/com/martiansoftware/nailgun-all/
/usr/share/maven-repo/com/martiansoftware/nailgun-all/0.9.1/
/usr/share/maven-repo/com/martiansoftware/nailgun-all/0.9.1/nailgun-all-0.9.1.pom
/usr/share/maven-repo/com/martiansoftware/nailgun-all/debian/
/usr/share/maven-repo/com/martiansoftware/nailgun-all/debian/nailgun-all-debian.pom
/usr/share/doc/
/usr/share/doc/nailgun/
/usr/share/doc/nailgun/copyright
/usr/share/doc/nailgun/changelog.Debian.gz
/usr/bin/
/usr/share/java/nailgun-server-0.9.1.jar
/usr/share/maven-repo/com/martiansoftware/nailgun-server/0.9.1/nailgun-server-0.9.1.jar
/usr/share/maven-repo/com/martiansoftware/nailgun-server/debian/nailgun-server-debian.jar