Update 3-tpm2clevis-prepluksandinstallhooks.sh

added test "trap" command.

3-tpm2clevis-prepluksandinstallhooks.sh

@@ -26,6 +26,7 @@ fi
 #Create tpmramfs for read user luks password to file.
 if mkdir tmpramfs && mount tmpfs -t tmpfs -o size=1M,noexec,nosuid tmpramfs; then
 	echo "Created tmpramfs to store luks key during setup."
+	trap "if [ -f tmpramfs/user.key ]; then rm -f tmpramfs/user.key; fi" EXIT
 	echo -n "Enter luks password: "; read -s PASSWORD; echo
 	echo -n "$PASSWORD" > tmpramfs/user.key
 	unset PASSWORD