diff --git a/check_and_add_pull_git/main.py b/check_and_add_pull_git/main.py
index b99d5d5..167cd5a 100644
--- a/check_and_add_pull_git/main.py
+++ b/check_and_add_pull_git/main.py
@@ -17,6 +17,10 @@ def search_str(file_path, word):
 
 user_bin = os.environ["HOME"] +  os.sep + "bin"
 user_zshrc = os.environ["HOME"] + "/.zshrc"
+my_logfile = os.sep + "var" + os.sep + "log" + os.sep + "pull_and_push.log"
+basic_command = "* */17 * * * pull_and_push >> " + my_logfile
+print(basic_command)
+is_exist = False
 
 if not os.path.exists(user_bin):
     os.mkdir(user_bin)
@@ -34,6 +38,15 @@ except FileExistsError:
     print("File konnte nicht kopiert werden")
 
 cron = CronTab(user=os.environ["USER"])
-cron_job = cron.new(command='pull_and_push >> /var/log/pull_and_push.log')
-cron_job.hours.every(17)
-cron.write()
\ No newline at end of file
+basic_iter = cron.find_command("pull_and_push >> " +  my_logfile)
+for item in basic_iter:
+    if str(item) == basic_command:
+        print("crontab job already exist", item)
+        is_exist=True
+        break
+
+if not is_exist:
+
+    cron_job = cron.new(command="pull_and_push >> " +  my_logfile)
+    cron_job.hours.every(17)
+    cron.write()
\ No newline at end of file
diff --git a/check_and_add_pull_git/pull_and_push.py b/check_and_add_pull_git/pull_and_push.py
index 8d4fa26..6de0425 100644
--- a/check_and_add_pull_git/pull_and_push.py
+++ b/check_and_add_pull_git/pull_and_push.py
@@ -1,5 +1,5 @@
 #!/usr/bin/env python3
-import os, git
+import os, git, datetime
 
 class my_git():
     def __init__(self, check_folder = str) -> None:
@@ -40,5 +40,7 @@ class my_git():
             my_git.git_push(self, git_folder=git_folder_s)
         
 if __name__ == "__main__":
+    print(str(datetime.datetime.now()) + "start...")
     check_my_git = my_git(check_folder= os.sep + "home" + os.sep + os.environ["USER"] + os.sep + "Projekte")
     check_my_git.git_main()
+    print(str(datetime.datetime.now()) + "...end")