/usr/share/ltsp/init-ltsp.d/08-edu-hostname is in debian-edu-config 1.818+deb8u2.
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 7 8 9 10 | #!/bin/sh
# Reorder scripts to make sure host name setting can use DNS lookup
dnsinit=/usr/share/ltsp/init-ltsp.d/10-resolv-conf
if [ -e $dnsinit ] ; then
. $dnsinit
fi
# Update hostname based on DNS or MAC address using our name scheme
HOSTNAME=$(/usr/sbin/update-hostname-from-ip -m -n)
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