diff --git a/sysmonitor-1.3.2/script/clocktransition.py b/sysmonitor-1.3.2/script/clocktransition.py
index be7298ffba5d77f0a1fff03863a526dc3ff82f1c..f4dd191ec737ea42f1a6666ea38176437d2c3ca7 100755
--- a/sysmonitor-1.3.2/script/clocktransition.py
+++ b/sysmonitor-1.3.2/script/clocktransition.py
@@ -47,9 +47,9 @@ def start_dhclient_task(cmd):
         # Get the pid and change the systemd cgroup
         sp_result = line.strip().split()
         pid = int(sp_result[0])
-
-        os.system(("mkdir -p /sys/fs/cgroup/systemd/system.slice/"
-            "network.service"))
+        if not os.path.exists("/sys/fs/cgroup/systemd/system.slice/network.service")
+            os.system(("mkdir -p /sys/fs/cgroup/systemd/system.slice/"
+                "network.service"))
         res_cmd = ("echo {0} > /sys/fs/cgroup/systemd/system.slice/"
             "network.service/tasks").format(pid)
 
@@ -101,16 +101,16 @@ def reset_dhclient():
         line = line.strip(' ')
         ret_flag = check_cmd_user(cmd_user)
         if not ret_flag:
-            syslog.syslog(syslog.LOG_ERR, "invaild cmd user, continue")
+            syslog.syslog(syslog.LOG_ERR, "invalid cmd user, continue")
             continue
         ret_flag = check_cmd_name(line)
         if not ret_flag:
-            syslog.syslog(syslog.LOG_ERR, "invaild cmd name, continue")
+            syslog.syslog(syslog.LOG_ERR, "invalid cmd name, continue")
             continue
         for inval in invalidstr:
             if line.find(inval) != -1:
                 inval_flag = True
-                str_info = ("invaild symbol in line cmd is {0}, "
+                str_info = ("invalid symbol in line cmd is {0}, "
                     "continue").format(inval)
                 syslog.syslog(syslog.LOG_ERR, str_info)
                 break
@@ -136,7 +136,7 @@ def reset_dhclient():
         except BaseException:
             syslog.syslog(syslog.LOG_ERR, "killed dhclient failed.")
         else:
-            syslog.syslog(syslog.LOG_INFO, "killed dhclient successed.")
+            syslog.syslog(syslog.LOG_INFO, "killed dhclient succeeded.")
         finally:
             syslog.syslog(syslog.LOG_INFO, "process kill dhclient end.")