| 1 | initial version |
The archive sage-8.9-Ubuntu_18.04-x86_64.tar.bz2, which you have downloaded, contains a binary version of SageMath, ready to run on Ubuntu 18.04. So there is no need to run make (*). Simply do
cd SageMath
./sage
to run SageMath in console mode, or
./sage -n jupyter
to run it in a Jupyter notebook.
(*) make probably failed in your case because some prerequisites to build from source are missing.
Copyright Sage, 2010. Some rights reserved under creative commons license. Content on this site is licensed under a Creative Commons Attribution Share Alike 3.0 license.