/etc/aolserver4/conf.d/dotlrn.sh is in dotlrn 2.5.0+dfsg2-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /etc/aolserver4/conf.d/../../dotlrn/dotlrn.sh
/etc/aolserver4/conf.d/../../dotlrn/dotlrn.sh