diff --git a/lib/config/periods.py b/lib/config/periods.py
index 35ac29a..76ddd55 100644
--- a/lib/config/periods.py
+++ b/lib/config/periods.py
@@ -71,23 +71,24 @@ class DatePeriod(Period):
 
 def parsePeriodList(periodlist, log):
     periods = []
-    log.i(periodlist)
+    #log.d("values of periodslist: " + str(periodlist.items()))
     for name, values in periodlist.items():
+        
         if "date" in values:
             periods.append(DatePeriod(name, **values))
             continue
         
-        for i in ["weeks", "days", "hours", "minutes", "seconds", "start_date"]:
-            if i in values:
-                periods.append(IntervalPeriod(name, **values))
-                break
-        
-        for i in ["year", "month", "day", "week", "day_of_week", "hour", "minute", "second"]:
-            if i in values:
-                periods.append(CronPeriod(name, **values))
-                break
-        
-        log.w("ignoring Period: " + str(name))
-        log.w("reason: could not determine PeriodType: " + str(values))
+        comp = ["weeks", "days", "hours", "minutes", "seconds", "start_date"]
+        if len([i for i in comp if i in values]) > 0 :
+            periods.append(IntervalPeriod(name, **values))
+            break
+            
+        comp = ["year", "month", "day", "week", "day_of_week", "hour", "minute", "second"]
+        if len([i for i in comp if i in values]) > 0 :
+            periods.append(CronPeriod(name, **values))
+            break
+        else:
+            log.w("ignoring Period: " + str(name))
+            log.w("reason: could not determine PeriodType: " + str(values))
 
-    return periods
\ No newline at end of file
+    return periods
diff --git a/lib/core/command.py b/lib/core/command.py
index 315af10..74c1b09 100644
--- a/lib/core/command.py
+++ b/lib/core/command.py
@@ -1,28 +1,40 @@
-import subprocess
-
+import subprocess as sp
+from subprocess import CalledProcessError
+from datetime import datetime as dt
 
 class Command:
     def __init__(self, command):
         self.command = command
         self.output = ""
         self.error = ""
+        self.retcode = 0
+        self.commandStart=0
 
     def __str__(self):
         return self.command
 
-    def hasProcessed(self):
-        return self.output != "" and self.error != ""
-
-    def doProcess(self):
-        process = subprocess.Popen([self.command], stdout=subprocess.PIPE)
+    def call(self):
+        '''
+        self.commandStart = dt.now()
+        "called at: "
+        process = sp.Popen(stdout=PIPE, *popenargs, **kwargs)
         self.output, self.error = process.communicate()
-
+        self.retcode = process.poll()
+        '''
+        try:
+            print self.command
+            self.output=sp.check_output(self.command.split(),stderr=sp.STDOUT)
+            
+        except CalledProcessError:
+            self.error=CalledProcessError.output
+            self.retcode = CalledProcessError.returncode
+        
     def getOutput(self):
-        if not self.hasProcessed():
-            self.doProcess()
         return self.output
 
     def getError(self):
-        if not self.hasProcessed():
-            self.doProcess()
-        return self.error
\ No newline at end of file
+        return self.error
+        
+    def getReturnCode(self):
+        return self.retcode
+        
diff --git a/lib/core/job.py b/lib/core/job.py
index c09628d..4c5d446 100644
--- a/lib/core/job.py
+++ b/lib/core/job.py
@@ -3,7 +3,7 @@ This is what job_function needs as parameter for each job to successfully
 execute.
 """
 
-import subprocess
+from command import Command
 
 
 class JobInfo:
@@ -14,6 +14,7 @@ class JobInfo:
         self.threshold = threshold
         self.parent = parent
         self.name = hostgroupname + "_" + service.name
+        self.jobs = []
         
     def __str__(self):
         return self.name
@@ -21,8 +22,21 @@ class JobInfo:
     def setLogger(self, log):
         self.log = log
         
+    def appendJob(self, job):
+        self.jobs.append(job)
+        
+    def getNextExecutionTime(self):
+        nextExecution = None
+        for job in self.jobs:
+            jobExec = job.trigger.get_next_fire_time()
+            if nextExecution is None or nextExecution > jobExec:
+                nextExecution = jobExec
+        return nextExecution
+        
     def handleCall(self):
-        #p = subprocess.Popen("df -h", stdout=subprocess.PIPE, shell=True)
-        #(output, err) = p.communicate()
-        #print output
-        pass
\ No newline at end of file
+        print "calling command " + str(service.command) 
+        cmd = Command(service.command)
+        self.log.d("executing command: " + str(command))
+        cmd.call()
+        return cmd
+        
diff --git a/linspector b/linspector
index 85edd29..44a79dd 100755
--- a/linspector
+++ b/linspector
@@ -42,8 +42,11 @@ def parseArgs():
 
 
 def handleJob(jobInfo):
-    jobInfo.handleCall()
+    print "handlejobInfo"
     print str(jobInfo)
+    print "executing: " + str(jobInfo.service.command)
+    jobInfo.handleCall()
+    
 
 
 def main():
@@ -90,4 +93,4 @@ def main():
 
 
 if __name__ == "__main__":
-    main()
\ No newline at end of file
+    main()
diff --git a/linspector.json b/linspector.json
index 8b59d5b..f8525da 100644
--- a/linspector.json
+++ b/linspector.json
@@ -213,9 +213,7 @@
             "threshold": 10,
             "services":
             {
-            	"load": ["twentyfourseven"],
-            	"discusage":["twentyfourseven"],
-                "ping": ["do_every_x_times"]
+            	"ping": ["do_every_x_times"]
             }
         }
     },