i think i almost have the default pass, i have to understand one more function

verb/fs.sbin/chpasswd.sh

@@ -0,0 +1,18 @@
+#!/bin/sh
+#
+# $Id: chpasswd.sh, v1.01 2015-03-24 steven
+#
+# usage: chpasswd.sh
+#
+
+user=`nvram_get 2860 AdminID`
+pass=`nvram_get 2860 AdminPassword`
+
+if [ "$user" == "" ]; then
+    echo "chpasswd: no user name"
+    exit 1
+fi
+
+echo "$user:$pass" > /tmp/tmpchpw
+chpasswd < /tmp/tmpchpw
+rm -f /tmp/tmpchpw