/usr/ is in golang-github-vishvananda-netns-dev 0.0~git20150710.0.604eaf1-1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/
/usr/share/gocode/
/usr/share/gocode/src/
/usr/share/gocode/src/github.com/
/usr/share/gocode/src/github.com/vishvananda/
/usr/share/gocode/src/github.com/vishvananda/netns/
/usr/share/gocode/src/github.com/vishvananda/netns/netns_linux_arm.go
/usr/share/gocode/src/github.com/vishvananda/netns/netns_unspecified.go
/usr/share/gocode/src/github.com/vishvananda/netns/netns_linux_ppc64le.go
/usr/share/gocode/src/github.com/vishvananda/netns/netns_linux_amd64.go
/usr/share/gocode/src/github.com/vishvananda/netns/netns_linux_386.go
/usr/share/gocode/src/github.com/vishvananda/netns/netns_linux_s390x.go
/usr/share/gocode/src/github.com/vishvananda/netns/netns_linux.go
/usr/share/gocode/src/github.com/vishvananda/netns/netns_test.go
/usr/share/gocode/src/github.com/vishvananda/netns/netns.go
/usr/share/gocode/src/github.com/vishvananda/netns/netns_linux_arm64.go
/usr/share/doc/
/usr/share/doc/golang-github-vishvananda-netns-dev/
/usr/share/doc/golang-github-vishvananda-netns-dev/copyright
/usr/share/doc/golang-github-vishvananda-netns-dev/changelog.Debian.gz