/usr/share/python/runtime.d/backintime-common.rtupdate is in backintime-common 1.0.10-1.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 | #! /bin/sh
set -e
if [ "$1" = rtupdate ]; then
pyclean -p backintime-common /usr/share/backintime/
pycompile -p backintime-common -V 2.5- /usr/share/backintime/
fi
|