diff --git a/.vscode/settings.json b/.vscode/settings.json
index ba3a677..64b1c51 100644
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -67,5 +67,6 @@
         "typeinfo": "cpp",
         "valarray": "cpp",
         "variant": "cpp"
-    }
+    },
+    "cmake.sourceDirectory": "${workspaceFolder}/source"
 }
\ No newline at end of file
diff --git a/source/ubl-settings-datetime.cc b/source/ubl-settings-datetime.cc
index 9312b51..f138c94 100644
--- a/source/ubl-settings-datetime.cc
+++ b/source/ubl-settings-datetime.cc
@@ -307,7 +307,6 @@ void MainWindow::get_builder() {
     builder->get_widget("imgSettings", imgSettings);
     builder->get_widget("imgSave", imgSave);
     builder->get_widget("boxWidgetFunc", boxWidgetFunc);
-    
 }
 
 void MainWindow::gui_exit() {
@@ -341,7 +340,7 @@ void MainWindow::event_log_hw() {
         int size_hw = sizeof(array_hw)/sizeof(array_hw[0]);
         for (int i = 0; i < size_hw; i++) {
             if (str_hw == array_hw_local[i]) {
-                this->write_config(map_config_data, array_hw[i], "hw");
+                this->write_config(array_hw[i], "hw");
             } 
         }
     }   
@@ -350,17 +349,17 @@ void MainWindow::event_log_hw() {
 void MainWindow::event_zone() {
     int activ_index_reg = cbRegion->get_active_row_number();
     if (activ_index_reg == -1) {
-        this->write_config(map_config_data, "error", "zone");
+        this->write_config("error", "zone");
         return;
     }
     string reg_text = array_region[activ_index_reg];
     int activ_index = cbZone->get_active_row_number();
     if (activ_index == -1) {
-        this->write_config(map_config_data, "error", "zone");
+        this->write_config("error", "zone");
         return;
     }
     string zone_text = "";
-    if(!(reg_text.empty())) {
+    if (!(reg_text.empty())) {
         int index= 0;
         for (const auto &zone: time_reg_map.at(reg_text)) {
             if (index == activ_index) {
@@ -369,7 +368,7 @@ void MainWindow::event_zone() {
             index+= 1;
         }
     }
-    this->write_config(map_config_data, zone_text, "zone");
+    this->write_config(zone_text, "zone");
 }
 
 void MainWindow::synopsis_show() {
@@ -393,12 +392,13 @@ void MainWindow::load_local_cfg() {
     string hw = "ubconfig --default --source system get clock HWCLOCK_SYNC";
     this->get_hardware_clock(hw);
     info_warning_error(0);
-    map_config_data_old = map_config_data;
+    map_config_data_global_local_old = map_config_data_global_local;
+    map_config_data_global_old = map_config_data_global;
+    map_config_data_local_old = map_config_data_local;
 }
 
 void MainWindow::load_globl_cfg() {
     flag_load = true;
-    
     string cmd_get_dhcp = "ubconfig  --default --source global get network NTPSERVERS";
     string cmd_default_get_dhcp = "ubconfig --source default get [] NTPSERVERS_DEFAULT";
     this->entry_dhcp_mess(cmd_get_dhcp, cmd_default_get_dhcp);
@@ -407,118 +407,174 @@ void MainWindow::load_globl_cfg() {
     string hw = "ubconfig --source global get clock HWCLOCK_SYNC";
     this->get_hardware_clock(hw);
     info_warning_error(1);
-    map_config_data_old = map_config_data;
+    map_config_data_global_local_old = map_config_data_global_local;
+    map_config_data_global_old = map_config_data_global;
+    map_config_data_local_old = map_config_data_local;
 }
 
 void MainWindow::save_local_cfg() {
-    string cmd_zone = "ubconfig --target system set clock ZONE=";
-    string cmd_default = "ubconfig --target system set network NTPSERVERS=default";
-    string cmd_dhcp = "ubconfig --target system set network NTPSERVERS=dhcp";
-    string cmd_set_ntp = "ubconfig --target system set network NTPSERVERS=\"";
-    string remove_ntp = "ubconfig --target system remove network NTPSERVERS";
-    string local = "ubconfig --target system set clock HWCLOCK_SYNC=localtime";
-    string hw = "ubconfig --target system set clock HWCLOCK_SYNC=utc";
-    if (this->check_config("region") == false || this->check_config("zone") == false) {
-        this->enter_zone(cmd_zone);
-    }
-    if (this->check_config("dhcp") == false) {
-        this->save_Dhcp(cmd_default, cmd_dhcp, remove_ntp, cmd_set_ntp);
-    }
-    if (this->check_config("hw") == false) {
-        this->set_hardware_clock(local, hw);
-    }  
-    info_warning_error(2);
-    map_config_data_old = map_config_data;
-    if (this->check_config("region") || this->check_config("zone") ||
-          this->check_config("dhcp") || this->check_config("hw")){
+    if ((this->check_config("region", 0) && this->check_config("zone", 0) &&
+          this->check_config("dhcp", 0) && this->check_config("hw", 0))) {
         lblWarning->set_text(_("Nothing to save!"));
-    }  
+    }
+    else {
+        string cmd_zone = "ubconfig --target system set clock ZONE=";
+        string cmd_default = "ubconfig --target system set network NTPSERVERS=default";
+        string cmd_dhcp = "ubconfig --target system set network NTPSERVERS=dhcp";
+        string cmd_set_ntp = "ubconfig --target system set network NTPSERVERS=\"";
+        string remove_ntp = "ubconfig --target system remove network NTPSERVERS";
+        string local = "ubconfig --target system set clock HWCLOCK_SYNC=localtime";
+        string hw = "ubconfig --target system set clock HWCLOCK_SYNC=utc";
+        if ((this->check_config("region", 0) == false || this->check_config("zone", 0) == false)) {
+            this->enter_zone(cmd_zone);
+        }
+        if (this->check_config("dhcp", 0) == false) {
+            this->save_Dhcp(cmd_default, cmd_dhcp, remove_ntp, cmd_set_ntp);
+        }
+        if (this->check_config("hw", 0) == false) {
+            this->set_hardware_clock(local, hw);
+        }  
+        info_warning_error(2);
+        map_config_data_local_old = map_config_data_local;
+        flag_local = true;
+    } 
 }
 
 void MainWindow::save_global_cfg() {
-    string cmd = "ubconfig --target global set clock ZONE=";
-    string cmd_default = "ubconfig --target global set network NTPSERVERS=default";
-    string cmd_dhcp = "ubconfig --target global set network NTPSERVERS=dhcp";
-    string cmd_set_ntp = "ubconfig --target global set network NTPSERVERS=\"";
-    string remove_ntp = "ubconfig --target global remove network NTPSERVERS";
-    string local = "ubconfig --target global set clock HWCLOCK_SYNC=localtime";
-    string hw = "ubconfig --target global set clock HWCLOCK_SYNC=utc";
-    if (this->check_config("region") == false || this->check_config("zone") == false) {
-        this->enter_zone(cmd);
-    }
-    if (this->check_config("dhcp") == false) {
-        this->save_Dhcp(cmd_default, cmd_dhcp, remove_ntp, cmd_set_ntp);
-    }
-    if (this->check_config("hw") == false) {
-        this->set_hardware_clock(local, hw);
-    }
-    info_warning_error(3);
-    map_config_data_old = map_config_data;
-    if (this->check_config("region") || this->check_config("zone") ||
-          this->check_config("dhcp") || this->check_config("hw")){
+    if ((this->check_config("region", 1) && this->check_config("zone", 1) &&
+          this->check_config("dhcp", 1) && this->check_config("hw", 1))) {
         lblWarning->set_text(_("Nothing to save!"));
     }
+    else {
+        string cmd = "ubconfig --target global set clock ZONE=";
+        string cmd_default = "ubconfig --target global set network NTPSERVERS=default";
+        string cmd_dhcp = "ubconfig --target global set network NTPSERVERS=dhcp";
+        string cmd_set_ntp = "ubconfig --target global set network NTPSERVERS=\"";
+        string remove_ntp = "ubconfig --target global remove network NTPSERVERS";
+        string local = "ubconfig --target global set clock HWCLOCK_SYNC=localtime";
+        string hw = "ubconfig --target global set clock HWCLOCK_SYNC=utc";
+        if ((this->check_config("region", 1) == false || this->check_config("zone", 1) == false)) {
+            this->enter_zone(cmd);
+        }
+        if (this->check_config("dhcp", 1) == false) {
+            this->save_Dhcp(cmd_default, cmd_dhcp, remove_ntp, cmd_set_ntp);
+        }
+        if (this->check_config("hw", 1) == false) {
+            this->set_hardware_clock(local, hw);
+        }
+        info_warning_error(3);
+        map_config_data_global_old = map_config_data_global;
+        flag_global = true;
+    }
 }
 void MainWindow::save_global_local_cfg() {
-    string cmd = "";
-    string cmd_default = "";
-    string cmd_dhcp = "";
-    string cmd_set_ntp = "";
-    string remove = "";
-    string local = "";
-    string hw = "";
-    string remove_ntp = "";
-    string cmd_zone = "";
-    if (this->check_config("region") == false || this->check_config("zone") == false) {
-        cmd_zone = "ubconfig --target system set clock ZONE=";
-        this->enter_zone(cmd_zone);
-        cmd_zone = "ubconfig --target global set clock ZONE=";
-        this->enter_zone(cmd_zone);
-    }
-    if (this->check_config("dhcp") == false) {
-        cmd_default = "ubconfig --target system set network NTPSERVERS=default";
-        cmd_dhcp = "ubconfig --target system set network NTPSERVERS=dhcp";
-        cmd_set_ntp = "ubconfig --target system set network NTPSERVERS=\"";
-        remove_ntp = "ubconfig --target system remove network NTPSERVERS";
-        this->save_Dhcp(cmd_default, cmd_dhcp, remove_ntp, cmd_set_ntp);
-        cmd_default = "ubconfig --target global set network NTPSERVERS=default";
-        cmd_dhcp = "ubconfig --target global set network NTPSERVERS=dhcp";
-        cmd_set_ntp = "ubconfig --target global set network NTPSERVERS=\"";
-        remove_ntp = "ubconfig --target global remove network NTPSERVERS";
-        this->save_Dhcp(cmd_default, cmd_dhcp, remove_ntp, cmd_set_ntp);
-    }
-    if (this->check_config("hw") == false) {
-        local = "ubconfig --target system set clock HWCLOCK_SYNC=localtime";
-        hw = "ubconfig --target system set clock HWCLOCK_SYNC=utc";
-        this->set_hardware_clock(local, hw);
-        local = "ubconfig --target global set clock HWCLOCK_SYNC=localtime";
-        hw = "ubconfig --target global set clock HWCLOCK_SYNC=utc";
-        this->set_hardware_clock(local, hw);
-    }
-    map_config_data_old = map_config_data;
-    info_warning_error(4);
-    if (this->check_config("region") || this->check_config("zone") ||
-          this->check_config("dhcp") || this->check_config("hw")){
+    if ((this->check_config("region", 2) && this->check_config("zone", 2) &&
+          this->check_config("dhcp", 2) && this->check_config("hw", 2))) {
         lblWarning->set_text(_("Nothing to save!"));
     }
+    else {
+        string cmd = "";
+        string cmd_default = "";
+        string cmd_dhcp = "";
+        string cmd_set_ntp = "";
+        string remove = "";
+        string local = "";
+        string hw = "";
+        string remove_ntp = "";
+        string cmd_zone = "";
+        if ((this->check_config("region", 2) == false || this->check_config("zone", 2) == false)) {
+            cmd_zone = "ubconfig --target system set clock ZONE=";
+            this->enter_zone(cmd_zone);
+            cmd_zone = "ubconfig --target global set clock ZONE=";
+            this->enter_zone(cmd_zone);
+        }
+        if (this->check_config("dhcp", 2) == false) {
+            cmd_default = "ubconfig --target system set network NTPSERVERS=default";
+            cmd_dhcp = "ubconfig --target system set network NTPSERVERS=dhcp";
+            cmd_set_ntp = "ubconfig --target system set network NTPSERVERS=\"";
+            remove_ntp = "ubconfig --target system remove network NTPSERVERS";
+            this->save_Dhcp(cmd_default, cmd_dhcp, remove_ntp, cmd_set_ntp);
+            cmd_default = "ubconfig --target global set network NTPSERVERS=default";
+            cmd_dhcp = "ubconfig --target global set network NTPSERVERS=dhcp";
+            cmd_set_ntp = "ubconfig --target global set network NTPSERVERS=\"";
+            remove_ntp = "ubconfig --target global remove network NTPSERVERS";
+            this->save_Dhcp(cmd_default, cmd_dhcp, remove_ntp, cmd_set_ntp);
+        }
+        if (this->check_config("hw", 2) == false) {
+            local = "ubconfig --target system set clock HWCLOCK_SYNC=localtime";
+            hw = "ubconfig --target system set clock HWCLOCK_SYNC=utc";
+            this->set_hardware_clock(local, hw);
+            local = "ubconfig --target global set clock HWCLOCK_SYNC=localtime";
+            hw = "ubconfig --target global set clock HWCLOCK_SYNC=utc";
+            this->set_hardware_clock(local, hw);
+        }
+        map_config_data_global_local_old = map_config_data_global_local;
+        info_warning_error(4);
+        flag_global_local = true;
+    }
 }
 
-void MainWindow::write_config(std::map <string, string> &map_config, string data, string key) {
-    cout << data << " " << key << endl;
-    map_config[key] = data;
+void MainWindow::write_config(string data, string key) {
+    
+    std::map <string, string>:: iterator it, it2, it3;
+    it3 = map_config_data_global_local.find(key);
+    it2 = map_config_data_global.find(key);
+    it = map_config_data_local.find(key);
+    if (it != map_config_data_local.end() || it2 != map_config_data_global.end() || it3 != map_config_data_global_local.end()) {
+        if (map_config_data_local[key] != data) {
+            map_config_data_global[key] = data;
+            map_config_data_local[key] = data;
+            map_config_data_global_local[key] = data;
+            flag_local = false;
+            flag_global = false;
+            flag_global_local = false; 
+        }
+    }
+    else if (it == map_config_data_local.end() || it2 == map_config_data_global.end() || it3 == map_config_data_global_local.end()) {
+        map_config_data_global[key] = data;
+        map_config_data_local[key] = data;
+        map_config_data_global_local[key] = data;
+        flag_local = false;
+        flag_global = false;
+        flag_global_local = false; 
+    }
 }
 
-bool MainWindow::check_config(string key) {
+bool MainWindow::check_config(string key, int key_save) {
     std::map <string, string>:: iterator iter_map_config_data;
     std::map <string, string>:: iterator iter_map_config_data_old;
+    std::map <string, string> map_config_data;
+    std::map <string, string> map_config_data_old;
+    if (key_save == 0 && flag_local == true) {
+        return true;
+    }
+    else if (key_save == 1 && flag_global == true) {
+        return true;
+    }
+    else if (key_save == 2 && flag_global_local == true) {
+        return true;
+    }
+    if (key_save == 0) {
+        iter_map_config_data = map_config_data_local.find(key);
+        map_config_data = map_config_data_local;
+        map_config_data_old = map_config_data_local_old;
+    }
+    else if (key_save == 1) {
+        iter_map_config_data = map_config_data_global.find(key);
+        map_config_data = map_config_data_global;
+        map_config_data_old = map_config_data_global_old;
+    }
+    else if (key_save == 2) {
+        iter_map_config_data = map_config_data_global_local.find(key);
+        map_config_data = map_config_data_global_local;
+        map_config_data_old = map_config_data_global_local_old;
+    }
     iter_map_config_data = map_config_data.find(key);
     iter_map_config_data_old = map_config_data_old.find(key);
-    if (iter_map_config_data == map_config_data.end()) {
-        cout << 1 << endl;
+    if (iter_map_config_data == map_config_data.end()) {;
         return false;
     }
     else if (iter_map_config_data_old == map_config_data_old.end()) {
-        cout << 2 << endl;
         return false;
     }
     else if (iter_map_config_data->second != iter_map_config_data_old->second) {
@@ -644,7 +700,7 @@ void MainWindow::get_hardware_clock(string &cmd) {
     int error = warning_info;
     struct Result<string> obj_result = this->wrapper_call(cmd);
     if (obj_result.error == 0) {
-        this->write_config(map_config_data, obj_result.response, "hw");
+        this->write_config(obj_result.response, "hw");
         if (obj_result.response.find("localtime") != string::npos) {
             if (array_hw[0] == "localtime"){
                 cbHw->set_active(0);
@@ -667,7 +723,7 @@ void MainWindow::get_hardware_clock(string &cmd) {
         }
     }
     else { 
-        this->write_config(map_config_data, "", "hw");
+        this->write_config("", "hw");
         cbHw->set_active(-1);
     }
     if (error != warning_info){
@@ -709,7 +765,7 @@ bool MainWindow::focus_ntp(string &cmd_set_ntp) {
         }
         if ((flag_error == false) && (flag_error_check_ntp == false)) {
             cmd = cmd_set_ntp + str_ntp + "\"";
-            this->write_config(map_config_data, str_ntp, "dhcp");
+            this->write_config(str_ntp, "dhcp");
             wrapper_system(cmd, "&");
         }
         else {
@@ -839,18 +895,18 @@ void MainWindow::event_entry_cbDhcp() {
     int activ_index = cbDhcp->get_active_row_number();
     if (str_dhcp.length() == 0) {
         cbDhcp->set_active(0);
-        this->write_config(map_config_data, "default", "dhcp");
+        this->write_config("default", "dhcp");
     }
     else if (activ_index == 0) {
         txtNtpServer->set_text(default_get_dhcp);
         txtNtpServer->set_sensitive(false);
-        this->write_config(map_config_data, "default", "dhcp");
+        this->write_config("default", "dhcp");
     }
     else if (activ_index == 1) {
         // btnUpdateDateTime->set_sensitive(false);
         txtNtpServer->set_sensitive(false);
         txtNtpServer->set_text("");
-        this->write_config(map_config_data, "dhcp", "dhcp");
+        this->write_config("dhcp", "dhcp");
     }
     else if (activ_index == 2) {
         txtNtpServer->set_text("");
@@ -866,15 +922,15 @@ void MainWindow::event_entry_cbDhcp() {
             if (response != "dhcp" && response != "default"){
                 txtNtpServer->set_text(response);
             }
-            this->write_config(map_config_data, response, "dhcp");
+            this->write_config(response, "dhcp");
             txtNtpServer->set_sensitive(true);
         }
         else {
-            this->write_config(map_config_data, "", "dhcp");
+            this->write_config("", "dhcp");
         }
     }
     else if (activ_index == 3) {
-        this->write_config(map_config_data, "", "dhcp");
+        this->write_config("", "dhcp");
         txtNtpServer->set_text("");
         txtNtpServer->set_sensitive(false);
         // btnUpdateDateTime->set_sensitive(true);
@@ -887,11 +943,11 @@ void MainWindow::save_Dhcp(string &cmd_default, string &cmd_dhcp, string &remove
     if (str_dhcp.length() == 0) {
     }
     else if (activ_index == 0) {
-        this->write_config(map_config_data, "default", "dhcp");
+        this->write_config("default", "dhcp");
         wrapper_system(cmd_default, "&");
     }
     else if (activ_index == 1) {
-        this->write_config(map_config_data, "dhcp", "dhcp");
+        this->write_config("dhcp", "dhcp");
         wrapper_system(cmd_dhcp, "&");
     }
     else if (activ_index == 2) {
@@ -904,7 +960,7 @@ void MainWindow::save_Dhcp(string &cmd_default, string &cmd_dhcp, string &remove
         if (start_error != error_info) {
             error_info=start_error;
         }
-        this->write_config(map_config_data, "", "dhcp");
+        this->write_config("", "dhcp");
     }    
 }
 
@@ -917,7 +973,7 @@ void MainWindow::entry_dhcp_mess(string cmd_get_dhcp, string cmd_default_get_dhc
         str_dhcp = str_dhcp.substr(str_dhcp.find("=")+1, str_dhcp.length());
         str_dhcp = str_dhcp.substr(0, str_dhcp.find("\n"));
         if (str_dhcp == "dhcp") {
-            this->write_config(map_config_data, "dhcp", "dhcp");
+            this->write_config("dhcp", "dhcp");
             cbDhcp->set_active(1);
             txtNtpServer->set_text("");
             txtNtpServer->set_sensitive(false);
@@ -927,7 +983,7 @@ void MainWindow::entry_dhcp_mess(string cmd_get_dhcp, string cmd_default_get_dhc
             cbDhcp->set_active(0);
             cmd = cmd_default_get_dhcp;
             struct Result<string> obj_result = this->wrapper_call(cmd);
-            this->write_config(map_config_data, "default", "dhcp");
+            this->write_config("default", "dhcp");
             txtNtpServer->set_sensitive(false);
             if (obj_result.error== 0) {
                 txtNtpServer->set_text(obj_result.response);
@@ -941,18 +997,18 @@ void MainWindow::entry_dhcp_mess(string cmd_get_dhcp, string cmd_default_get_dhc
         else {
             // btnUpdateDateTime->set_sensitive(false);
             if (str_dhcp == "") {
-                this->write_config(map_config_data, "", "dhcp");
+                this->write_config("", "dhcp");
                 lblMessage->set_text(_("Enter DHCP!"));
                 windowMessDchp->show();
             }
             else if (str_dhcp == "(null)") {
                 cbDhcp->set_active(0);
                 txtNtpServer->set_text("");
-                this->write_config(map_config_data, "", "dhcp");
+                this->write_config("", "dhcp");
             }
             else {
                 cbDhcp->set_active(2);
-                this->write_config(map_config_data, str_dhcp, "dhcp");
+                this->write_config(str_dhcp, "dhcp");
                 txtNtpServer->set_text(str_dhcp);
                 if (flag_ntp_edit ==false) {
                     txtNtpServer->set_sensitive(true);
@@ -961,7 +1017,7 @@ void MainWindow::entry_dhcp_mess(string cmd_get_dhcp, string cmd_default_get_dhc
         }
     }
     else {
-        this->write_config(map_config_data, "", "dhcp");
+        this->write_config("", "dhcp");
         cbDhcp->set_active(3);
         txtNtpServer->set_text("");
         txtNtpServer->set_sensitive(false);
@@ -1113,8 +1169,8 @@ void MainWindow::parse_text_date() {
 }
 
 void MainWindow::append_region_zone(string region, string zone, Gtk::ComboBoxText *tmpCbReg, Gtk::ComboBoxText *tmpCbZone) {
-    this->write_config(map_config_data, region, "region");
-    this->write_config(map_config_data, zone, "zone");
+    this->write_config(region, "region");
+    this->write_config(zone, "zone");
     str_region = region;
     int index = 0;
     Glib::ustring reg_local = "";
@@ -1219,7 +1275,7 @@ void MainWindow::append_zone() {
     if (index!=-1) {
         string str_region = array_region[index];
         string zone_mixing =  ""; 
-        this->write_config(map_config_data, str_region, "region");
+        this->write_config(str_region, "region");
         string path_dir =  ""; 
         if(str_region.length() != 0) {
             for (const auto &_str_zone : time_reg_map_local.at(str_region)) {
diff --git a/source/ubl-settings-datetime.h b/source/ubl-settings-datetime.h
index 3fa8d31..27ea2dd 100644
--- a/source/ubl-settings-datetime.h
+++ b/source/ubl-settings-datetime.h
@@ -127,6 +127,10 @@ class MainWindow : public Gtk::ApplicationWindow {
         int minute;
         string str_region = "";
         string str_zone = "";
+        int count_edit = 0;
+        bool flag_global = false;
+        bool flag_local = false;
+        bool flag_global_local = false;
         template<typename Type>
         struct Result{
             Type response;
@@ -135,8 +139,14 @@ class MainWindow : public Gtk::ApplicationWindow {
         vector<string> array_region_local;
         vector<string> array_region;
         std::map <string, string> map_error;
-        std::map <string, string> map_config_data;
-        std::map <string, string> map_config_data_old;
+        
+        std::map <string, string> map_config_data_global;
+        std::map <string, string> map_config_data_local;
+        std::map <string, string> map_config_data_global_local;
+        std::map <string, string> map_config_data_global_old;
+        std::map <string, string> map_config_data_local_old;
+        std::map <string, string> map_config_data_global_local_old;
+        
 
         
     public:
@@ -153,9 +163,9 @@ class MainWindow : public Gtk::ApplicationWindow {
         void load_globl_cfg();
         void save_local_cfg();
         void event_zone();
-        bool check_config(string key);
+        bool check_config(string key, int key_save);
         void event_log_hw();
-        void write_config(std::map <string, string> &map_config, string data, string key);
+        void write_config(string data, string key);
         string get_ubconfig_value(string &cmd);
         void save_global_cfg();
         void save_Dhcp(string &cmd_default, string &cmd_dhcp, string &remove, string &cmd_set_ntp);