/usr/share/sagemath/bin/sage-version.sh is in sagemath-common 8.1-7ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 | # Sage version information for shell scripts
# This file is auto-generated by the sage-update-version script, do not edit!
SAGE_VERSION='8.1'
SAGE_RELEASE_DATE='2017-12-07'
|