updated linux df comand, use cmdDf, new regex

I changed the df comand to get addtional information. With the output param from df you can add additional informations. (found this information in linux comand: "info coreutils 'df invocation' ") Its nice to know the filesystem type too. Because of that i changed the regex and added "type" to the "infos" object.
Also i fixed the use of the cmdDf variable as requested before.