In some cases, the user being shadowed need to be aware that their session is being monitored. By running the tl-shadow-notify program during the session lifetime, a window will pop up with information about the shadowing whenever shadowing starts or stops.
To start tl-shadow-notify automatically during session startup, a symbolic link must be created in /opt/thinlinc/etc/xstartup.d:
# ln -s /opt/thinlinc/bin/tl-shadow-notify /opt/thinlinc/etc/xstartup.d/15-tl-shadow-notify
To deactivate tl-shadow-notify, remove the symbolic link from /opt/thinlinc/etc/xstartup.d.
# rm /opt/thinlinc/etc/xstartup.d/15-tl-shadow-notify