apt-transport-spacewalk software package provides APT transport for communicating with Spacewalk servers, you can install in your Ubuntu 16.04 LTS (Xenial Xerus) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install apt-transport-spacewalk
apt-transport-spacewalk is installed in your system.
Make ensure the apt-transport-spacewalk package were installed using the commands given below,
$ sudo dpkg-query -l | grep apt-transport-spacewalk *
You will get with apt-transport-spacewalk package name, version, architecture and description in a table
| Distro | Ubuntu 16 04 lts xenial xerus |
| Section | Administration Utilities |
| Package | apt-transport-spacewalk |
| Version | 1.0.6-4.1 |
| Description | APT transport for communicating with Spacewalk servers |
| Sub Section | admin |