diff --git a/scripts/get-os.sh b/scripts/get-os.sh
index 00134dfe..1e5f900b 100755
--- a/scripts/get-os.sh
+++ b/scripts/get-os.sh
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 ########################################################################
 #                                                                      #
 # generic utiltiy modules                                              #
@@ -104,12 +104,14 @@ cmd_name_version()
 
 cmd_version()
 {
-	cmd_name_version | cut -d- -f2-
+	local nv=`cmd_name_version`
+	echo ${nv#*-}
 }
 
 cmd_name()
 {
-	cmd_name_version | cut -d- -f1
+	local nv=`cmd_name_version`
+	echo ${nv%%-*}
 }
 
 # --- here we go
@@ -118,7 +120,7 @@ myname=`basename $0`
 release_file=/etc/os-release
 cmd=name_version
 
-set -- `getopt 'hvV' $*`
+eval set -- `getopt -- hvV "$@"`
 while [ "$1" != -- ] ; do
 case "$1" in
 	-h)
@@ -138,7 +140,6 @@ shift
 done
 shift
 
-[ "$1" ] && cmd="$1"
+[ "$1" ] && cmd="${1/-/_}"
 
 eval cmd_$cmd
-