Geotagging vs Geofencing

Always come across the words Geotagging and geofencing. Hence i would like to note down the different of these words in my blog. Both are related to location-based technologies, but they serve different purposes. Here's an explanation of each term:

Geotagging

Geotagging is the process of adding geographical metadata, such as latitude and longitude coordinates, to various forms of media such as photos, videos, or text. It enables the identification and organization of content based on its specific location. Geotagging can be done manually, where users add location information to their content, or automatically through GPS-enabled devices that capture the coordinates at the time of creation.

For example, when you take a photo with a smartphone, the device can automatically embed the GPS coordinates into the image file, allowing you to view the location where the photo was taken on a map.

Geofencing

 Geofencing is a location-based service that involves creating virtual boundaries or fences around a specific geographic area. These boundaries can be defined using GPS, RFID (Radio Frequency Identification), or cellular/Wi-Fi network signals. When a device or user enters or exits a geofenced area, predefined actions or notifications can be triggered.

Geofencing is commonly used in various applications. For instance, retail businesses can set up geofences around their stores. When a customer with a mobile app enters the geofenced area, they may receive location-specific offers or notifications. Geofencing can also be utilized for security purposes, where an alert is sent if an unauthorized device enters a restricted area.

In summary, geotagging is the process of attaching location metadata to media content, while geofencing involves creating virtual boundaries to trigger actions or notifications based on the user's entry or exit from a specific area. 

Install SSH on Ubuntu Server

When you see the subject you know that we going to demonstrate how to install SSH on Ubuntu Server.

Let assume your machine able to fetch from repository from internet. So here I going to install the SSH in Ubuntu in order to remotely control the machine.

sudo apt-get install openssh-server

After install the SSH, you can using below command to verify the ssh service is up and running. And now you can connect the using putty to remote terminal with port number of 22.

sudo systemctl status ssh.service

To stop the SSH service

sudo systemctl stop ssh

To restart SSH Service

sudo systemctl restart ssh

Window Registry Add, Edit and Delete

In Window enviroment, registry play a role to store setting and so forth. To know more please find out more yourself. So today I here to write on how to adding, editing and delete the Window registry by using reg file. Registry is arranged in a hierarchy tree view. So to edit or adding the registry value, you may need to ensure the path of the registry is correct point to the particular path. Let see example below you may know.

To delete

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SOFTWARE\Cisco Systems\VPN Client]

"test"=-

To Add

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SOFTWARE\Cisco Systems\VPN Client]

"test"="123"


To Update

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SOFTWARE\Cisco Systems\VPN Client]

"test"="456"


Copy the registry and save it as reg file, once the file execute and the value will change accordingly.

Group Policy Enforcement for NTP

As per last few post I did write about setup a NTP server on Ubuntu. So now here I going to write about consuming the NTP service in Window environment with the use of Group policy.

Step 1
Click "Start," type "gpedit.msc" into the search box, press "Enter" and select "Group Policy Editor" from the list of results.

Step 2
Double-click "Computer Configuration | Administrative Template | System | Windows Time Service|Time Provider"

After click on  "Time Provider", from the right pane there are few option for you to do the configuration. So you may enable the NTP and configure the parameters for the NTP.


Step 3
Select "Enabled" to respond to time synchronization queries; click "Disabled" to ignore requests.

Step 4
Configure the group policy object accordingly.

Step 5
Verify the policy is working by gpupdate /force in client PC and do a reboot. Then locate the registry and look for the value is change accordingly.

HKLM\SYSTEM\CurrentControlSet\services\W32Time\Parameters

Setup Printer Server in Window Enviroment

Recently company performing upgrading the printer due to the contract of leasing is end. So i have these opportunities to re-setup the entire print server and all the printer in the company. But here I to record down the very small request that requested by end user in my company.

So before you setup print server, you need few parameters in order to make sure the installation is going smooth.

1. A server with complete setup and with fix ip.
2. IP addresses for printer.
3. AD server IP address or name for user authentication.
4. SMTP server name or IP and account for scan to email (may vary to different setup)
5. And the printer driver.

The request of the end user always very strange and picky. So have to really do a lot of home work. 

When the user is printing, he/she dun not want to see the notification appear as they consider it is an interference for them. So to disable the notification during printing, you have go to Device and Printers (You can locate this in control panel too). At the top of the device and printer window, at the top bar there is a menu with the name of Printer server properties. As shown at below picture.

While for Window XP you may locate it On the File menu, click Server Properties.

Then another small window menu will pop up and go to last tab to the menu. You will see there is a check box with the description. Select the setting as you wish and save it.To disable the notification when printing, uncheck Show informational notification for network printers. Please take note that the menu may vary according to the printer driver.

Setup NTP Server in Ubuntu

In order to ensure the LAN client all time is same and reduce the network usage, you may implement a local NTP server rather than each of the PC in LAN get update from internet.

If you are using terminal only you can use date command to check the system date time.

So here we going to install NTP server.

sudo apt-get install ntp

As usual after install the ntp server, we may proceed with doing the configuration by using the below configuration to do the change.

sudo nano /etc/ntp.conf

After open up the ntp.conf file with nano, you will see some show as below. Here is the list of NTP server that you get update from it. So by default is Ubuntu server, if you wish to change the NTP server as your preference you may delete and change it to your preferred server.

# Use servers from the NTP Pool Project. Approved by Ubuntu Technical Board
# on 2011-02-08 (LP: #104525). See http://www.pool.ntp.org/join.html for
# more information.
server 0.ubuntu.pool.ntp.org
server 1.ubuntu.pool.ntp.org
server 2.ubuntu.pool.ntp.org
server 3.ubuntu.pool.ntp.org

After change the conf, please do not forget to save it. To ensure the change is made, you may verify it by using command below to check the performance or summary of the NTP server.

sudo ntpq -p

Here is an example output after assign the command.

# sudo ntpq -p
     remote           refid      st t when poll reach   delay   offset  jitter
==============================================================================
+stratum2-2.NTP. 129.70.130.70    2 u    5   64  377   68.461  -44.274 110.334
+ntp2.m-online.n 212.18.1.106     2 u    5   64  377   54.629  -27.318  78.882
*145.253.66.170  .DCFa.           1 u   10   64  377   83.607  -30.159  68.343
+stratum2-3.NTP. 129.70.130.70    2 u    5   64  357   68.795  -68.168 104.612
+europium.canoni 193.79.237.14    2 u   63   64  337   81.534  -67.968  92.792

After change the ntp server in the ntp.conf file, you have to remember to reload the file or restart the service in order to apply the change.

You may reload the service by command below.

sudo service ntp reload

or you can restart the service as command below.

sudo service ntp restart

Stop the service by using command below.

sudo service ntp stop

Start the service by using command below.

sudo service ntp start

Install FTP Server on Ubuntu

Here we go to install the very secure FTP on Ubuntu.

sudo apt-get install vsftpd

After finish install vsftpd, you may think of change the configuration for the application.

sudo nano /etc/vsftpd.conf

Once you open up the conf file with nano, you may see all the configuration available in this file and all the configuration name is identical. Change the setting as you need. For an example, the most important thing is to restrict the anonymous access we disable it. In the vsftpd.conf look for below parameters and change YES to NO.

anonymous_enable=NO

So now you may able to transfer file using your favorite FTP software. For me I am using WinSCP for a reason that it is really light weight.