Debian 7.8 was released Saturday, 10th January 2015. Installation and upgrading instructions. Debian 8.1, or jessie. Debian 8.1 was released Saturday, 6th June 2015. Installation and upgrading instructions. Testing, or stretch. The current tested development snapshot is named stretch. Packages which have been tested in unstable and passed automated tests propagate to this release. Unstable, or sid. The current development snapshot is named sid. Untested candidate packages for future releases.