We’ve made some changes to how you install the Atlassian plugin SDK and where it is hosted.
As part of these changes, we have decided that it will no longer be possible to install the SDK via apt-get in Debian & Ubuntu distributions. You can find updated installation instructions here. If you already have the SDK installed in this way, and wish to update you should first uninstall the SDK and then re-install it using the instructions provided.
The URL for accessing the Atlassian Plugin SDK install files will remain as sdkrepo.atlassian.com and you will also still be able to access the release notes and install files via marketplace.atlassian.com.
Thanks for your understanding and patience, please do let us know if you experience any problems accessing the Atlassian Plugin SDK installation files.