Issue with sage-9.3-Ubuntu_20.04-x86_64.tar.bz2

[Eric Gourgoulhon]

Hi all,

I've just noticed that when running ./sage immediately after unpacking sage-9.3-Ubuntu_20.04-x86_64.tar.bz2 on a freshly installed Ubuntu 20.04.2 system, one gets the error message

/usr/bin/python: not found

The issue is immediately fixed by installing the Ubuntu package python-is-python3, which simply provides a symlink from /usr/bin/python to /usr/bin/python3.

Since the package python-is-python3 is not installed by default in Ubuntu 20.04, this certainly perturb new users.

Could this be fixed when preparing the Ubuntu binaries for Sage 9.4 ?

If not, python-is-python3 should be mentioned as a prerequisite for installing Sage binary on the download page.

Eric.

[Matthias Köppe]

This is https://github.com/sagemath/binary-pkg/issues/28