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+
+
+# list available targets
+#
+update-alternatives --list my.cnf
+
+# show further information including current selection, best selection and  priority, where 
+# a higher value has priority (automatic selection)
+#
+update-alternatives --display my.cnf 
+
+
+# To select a specific implementation, use the following command as root and then select
+#  a number from the list:
+#
+# also useful to see the current selection
+#
+update-alternatives --config my.cnf
+
+
+# Return to automatic selection
+#
+update-alternatives --auto my.cnf
+
+
+# delete an alternative
+#
+#     update-alternatives --remove my.cnf <Pfad>
+#
+update-alternatives --remove my.cnf /usr/local/mysql/etc/my.cnf