/usr/share/go-1.6/src/encoding/gob/ 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/encoding/gob/codec_test.go
/usr/share/go-1.6/src/encoding/gob/debug.go
/usr/share/go-1.6/src/encoding/gob/dec_helpers.go
/usr/share/go-1.6/src/encoding/gob/decgen.go
/usr/share/go-1.6/src/encoding/gob/decode.go
/usr/share/go-1.6/src/encoding/gob/decoder.go
/usr/share/go-1.6/src/encoding/gob/doc.go
/usr/share/go-1.6/src/encoding/gob/dump.go
/usr/share/go-1.6/src/encoding/gob/enc_helpers.go
/usr/share/go-1.6/src/encoding/gob/encgen.go
/usr/share/go-1.6/src/encoding/gob/encode.go
/usr/share/go-1.6/src/encoding/gob/encoder.go
/usr/share/go-1.6/src/encoding/gob/encoder_test.go
/usr/share/go-1.6/src/encoding/gob/error.go
/usr/share/go-1.6/src/encoding/gob/example_encdec_test.go
/usr/share/go-1.6/src/encoding/gob/example_interface_test.go
/usr/share/go-1.6/src/encoding/gob/example_test.go
/usr/share/go-1.6/src/encoding/gob/gobencdec_test.go
/usr/share/go-1.6/src/encoding/gob/timing_test.go
/usr/share/go-1.6/src/encoding/gob/type.go
/usr/share/go-1.6/src/encoding/gob/type_test.go