# Starting Sage from precompiled binary

Hello ! My operating system is Xubuntu 16.04.1 x86_64. I've downloaded sage-8.2-Ubuntu_16.04-x86_64.tar.bz2 precompiled binary archive and checked md5 sum. Beforehand I also checked sage prerequisites and installed them all, including openssl. However, after package untar and attempt to launch ./sage, the error message appears: It seems that you are attempting to run Sage from an unpacked source
tarball, but you have not compiled it yet (or maybe the build has not finished). You should run `make`

in the Sage root directory first. If you did not intend to build Sage from source, you should download a binary tarball instead. Read README.txt for more information.

Maybe someone have already encountered this problem? There might be some bug in sage installation check?

My intention is to install sagemath kernel to the existing jupyter installation. I tried to install kernelspec for the existing jupyter installation without running ./sage, and installation completes, but kernel can't start.