diff --git a/reboot-all-chromes.sh b/reboot-all-chromes.sh
index c77d9c4..64b8755 100755
--- a/reboot-all-chromes.sh
+++ b/reboot-all-chromes.sh
@@ -2,26 +2,40 @@
 
 
 function rebootMachine() {
-	local machine=$1
-	if (( ${machine} < 10 )); then
-		machine="0${machine}"
+	local MACHINE=$1
+	local HOW=$2
+	if (( ${MACHINE} < 10 )); then
+		MACHINE="0${MACHINE}"
 	fi
-	machine="chrome${machine}.duensing.digital"
-	echo "Attempting reboot of ${machine}..."
-	sshpass -p password ssh -o "StrictHostKeyChecking=no" user@${machine} "sudo reboot"
+	MACHINE="chrome${MACHINE}.duensing.digital"
+	echo "Attempting reboot of ${MACHINE}..."
+	sshpass -p password ssh -o "StrictHostKeyChecking=no" user@${MACHINE} "sudo ${HOW}"
 }
 
 
+# Install needed packages.
 which -s sshpass
 if [[ $? -eq 1 ]]; then
 	sudo apt-get install -y sshpass
 fi
 
 
+# Figure out what to do.
+HOW="reboot"
+
 if [[ -z $1 ]]; then
-	for i in {1..13}; do
-		rebootMachine $i
+	echo "$0 [all|#] {shutdown}"
+	exit 1
+fi
+
+if [[ "$2x" == "shutdownx" ]]; then
+	HOW="poweroff"
+fi
+
+if [[ "$1x" == "allx" ]]; then
+	for I in {1..13}; do
+		rebootMachine ${I} ${HOW}
 	done
 else
-	rebootMachine $1
+	rebootMachine ${1} ${HOW}
 fi