/usr/share/go-1.6/src/runtime/internal/ is in golang-1.6-src 1.6.1-0ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/go-1.6/src/runtime/internal/atomic/
/usr/share/go-1.6/src/runtime/internal/atomic/asm.s
/usr/share/go-1.6/src/runtime/internal/atomic/asm_386.s
/usr/share/go-1.6/src/runtime/internal/atomic/asm_amd64.s
/usr/share/go-1.6/src/runtime/internal/atomic/asm_amd64p32.s
/usr/share/go-1.6/src/runtime/internal/atomic/asm_arm.s
/usr/share/go-1.6/src/runtime/internal/atomic/asm_arm64.s
/usr/share/go-1.6/src/runtime/internal/atomic/asm_mips64x.s
/usr/share/go-1.6/src/runtime/internal/atomic/asm_ppc64x.s
/usr/share/go-1.6/src/runtime/internal/atomic/asm_s390x.s
/usr/share/go-1.6/src/runtime/internal/atomic/atomic_386.go
/usr/share/go-1.6/src/runtime/internal/atomic/atomic_amd64x.go
/usr/share/go-1.6/src/runtime/internal/atomic/atomic_arm.go
/usr/share/go-1.6/src/runtime/internal/atomic/atomic_arm64.go
/usr/share/go-1.6/src/runtime/internal/atomic/atomic_arm64.s
/usr/share/go-1.6/src/runtime/internal/atomic/atomic_mips64x.go
/usr/share/go-1.6/src/runtime/internal/atomic/atomic_mips64x.s
/usr/share/go-1.6/src/runtime/internal/atomic/atomic_ppc64x.go
/usr/share/go-1.6/src/runtime/internal/atomic/atomic_ppc64x.s
/usr/share/go-1.6/src/runtime/internal/atomic/atomic_s390x.go
/usr/share/go-1.6/src/runtime/internal/atomic/atomic_test.go
/usr/share/go-1.6/src/runtime/internal/atomic/stubs.go
/usr/share/go-1.6/src/runtime/internal/atomic/sys_darwin_arm.s
/usr/share/go-1.6/src/runtime/internal/atomic/sys_freebsd_arm.s
/usr/share/go-1.6/src/runtime/internal/atomic/sys_linux_arm.s
/usr/share/go-1.6/src/runtime/internal/atomic/sys_nacl_arm.s
/usr/share/go-1.6/src/runtime/internal/atomic/sys_netbsd_arm.s
/usr/share/go-1.6/src/runtime/internal/atomic/sys_openbsd_arm.s
/usr/share/go-1.6/src/runtime/internal/sys/
/usr/share/go-1.6/src/runtime/internal/sys/arch_386.go
/usr/share/go-1.6/src/runtime/internal/sys/arch_amd64.go
/usr/share/go-1.6/src/runtime/internal/sys/arch_amd64p32.go
/usr/share/go-1.6/src/runtime/internal/sys/arch_arm.go
/usr/share/go-1.6/src/runtime/internal/sys/arch_arm64.go
/usr/share/go-1.6/src/runtime/internal/sys/arch_mips64.go
/usr/share/go-1.6/src/runtime/internal/sys/arch_mips64le.go
/usr/share/go-1.6/src/runtime/internal/sys/arch_ppc64.go
/usr/share/go-1.6/src/runtime/internal/sys/arch_ppc64le.go
/usr/share/go-1.6/src/runtime/internal/sys/arch_s390x.go
/usr/share/go-1.6/src/runtime/internal/sys/gengoos.go
/usr/share/go-1.6/src/runtime/internal/sys/stubs.go
/usr/share/go-1.6/src/runtime/internal/sys/sys.go
/usr/share/go-1.6/src/runtime/internal/sys/zgoarch_386.go
/usr/share/go-1.6/src/runtime/internal/sys/zgoarch_amd64.go
/usr/share/go-1.6/src/runtime/internal/sys/zgoarch_amd64p32.go
/usr/share/go-1.6/src/runtime/internal/sys/zgoarch_arm.go
/usr/share/go-1.6/src/runtime/internal/sys/zgoarch_arm64.go
/usr/share/go-1.6/src/runtime/internal/sys/zgoarch_mips64.go
/usr/share/go-1.6/src/runtime/internal/sys/zgoarch_mips64le.go
/usr/share/go-1.6/src/runtime/internal/sys/zgoarch_ppc64.go
/usr/share/go-1.6/src/runtime/internal/sys/zgoarch_ppc64le.go
/usr/share/go-1.6/src/runtime/internal/sys/zgoarch_s390x.go
/usr/share/go-1.6/src/runtime/internal/sys/zgoos_android.go
/usr/share/go-1.6/src/runtime/internal/sys/zgoos_darwin.go
/usr/share/go-1.6/src/runtime/internal/sys/zgoos_dragonfly.go
/usr/share/go-1.6/src/runtime/internal/sys/zgoos_freebsd.go
/usr/share/go-1.6/src/runtime/internal/sys/zgoos_linux.go
/usr/share/go-1.6/src/runtime/internal/sys/zgoos_nacl.go
/usr/share/go-1.6/src/runtime/internal/sys/zgoos_netbsd.go
/usr/share/go-1.6/src/runtime/internal/sys/zgoos_openbsd.go
/usr/share/go-1.6/src/runtime/internal/sys/zgoos_plan9.go
/usr/share/go-1.6/src/runtime/internal/sys/zgoos_solaris.go
/usr/share/go-1.6/src/runtime/internal/sys/zgoos_windows.go
/usr/share/go-1.6/src/runtime/internal/sys/zversion.go