diff --git a/cd.sh b/cd.sh
index 3161651..29060d7 100644
--- a/cd.sh
+++ b/cd.sh
@@ -324,8 +324,13 @@ local variable="${1}"
     exit 2
 }
 
-cd_get_string () {
-    [ "${1}" ] && echo "${1}" | cut -d "=" -f 2 | cut -d "\"" -f 2
+cd_grep_os () {
+local variable="${1}"
+    if [ "${variable}" ] ; then
+        grep "^${variable}=" "/etc/os-release" \
+        | sed "s|^${variable}||" \
+        | sed "s|^\"\(.*\)\"$|\1|"
+    fi
 }
 
 cd_install_package () {