# Exit if system was not booted by live-initramfs
grep -qs boot=live /proc/cmdline || exit 0
+# Exit if the system was booted from an ISO image rather than a physical CD
+grep -qs find_iso= /proc/cmdline && exit 0
+
# Read configuration variable file if it is present
[ -r /etc/live.conf ] && . /etc/live.conf