1 2 3 4 5 | ubuntu@localhost:~$ sudo snappy install upnp-server-amd64.ogra Installing upnp-server-amd64.ogra 45.41 MB / 45.41 MB [===========================================================================] 100.00 % 2.36 MB/s upnp-server-amd64 failed to install: cannot open snap: unknown header: "!<arch>\ndebian-binar" ubuntu@localhost:~$ |