Add distro-specific, update "unsuppported" message

distro-specific.bash

@@ -0,0 +1,25 @@
+#!/usr/bin/env bash
+set -e
+if [ $(whoami) == "root" ]; then
+    echo "Run as a normal user, not root"
+    exit 1
+fi
+
+command_exists() { type "$1" &>/dev/null; }
+
+if command_exists "apt-get"; then
+    ;
+elif command_exists "yum"; then
+    ;
+elif command_exists "pacman"; then
+    ;
+elif command_exists "zypp"; then
+    # Untested
+    ;
+elif command_exists "emerge"; then
+    ;
+elif command_exists "apk"; then
+    ;
+else
+    echo "Unsupported: unknown package manager and distro"
+fi