gistfile2.txt

➜  sources.list.d cat ./atlassian-hipchat4.list 
deb https://atlassian.artifactoryonline.com/atlassian/hipchat-apt-client xenial main


➜  sources.list.d sudo apt-get update                                                                                     
Hit:1 http://us.archive.ubuntu.com/ubuntu xenial InRelease
Get:2 http://us.archive.ubuntu.com/ubuntu xenial-updates InRelease [92.2 kB]                                        
Get:3 http://security.ubuntu.com/ubuntu xenial-security InRelease [92.2 kB]                                               
Hit:5 http://us.archive.ubuntu.com/ubuntu xenial-backports InRelease                                                      
Hit:8 http://dl.google.com/linux/chrome/deb stable Release                                                 
Hit:9 http://ppa.launchpad.net/webupd8team/atom/ubuntu xenial InRelease                                    
Ign:11 https://atlassian.artifactoryonline.com/atlassian/hipchat-apt-client xenial InRelease
Get:13 https://atlassian.artifactoryonline.com/atlassian/hipchat-apt-client xenial Release.gpg [821 B]
Fetched 185 kB in 4s (46.0 kB/s)     
Reading package lists... Done
E: Failed to fetch https://atlassian.artifactoryonline.com/atlassian/hipchat-apt-client/dists/xenial/Release  No Hash entry in Release file /var/lib/apt/lists/partial/atlassian.artifactoryonline.com_atlassian_hipchat-apt-client_dists_xenial_Release which is considered strong enough for security purposes
E: Some index files failed to download. They have been ignored, or old ones used instead.