Add prerequisite check script

README.txt

@@ -12,6 +12,8 @@ Prerequisites:
 * hdparm (for shutting disks down)
 * cryptsetup (for setting up LUKS block devices)
 
+For a basic check of prerequisites, you can run "./check_prereq" as root
+
 Usage:
 * Installation: ./install
 * Uninstallation: ./uninstall

check_prereq

@@ -0,0 +1,20 @@
+#!/usr/bin/env bash
+prereqs=(
+	"bash"
+	"mkdir"
+	"mount"
+	"umount"
+	"eject"
+	"blkid"
+	"lsblk"
+	"findmnt"
+	"hdparm"
+	"cryptsetup"
+)
+
+for prereq in "${prereqs[@]}"; do
+	echo -n "$prereq: "
+	if ! command -v "$prereq"; then
+		echo "NOT FOUND."
+	fi
+done