Validation on the Select input type element of a form in HTML5

Validation is an important part of any web application or website. In HTML5 validation is very simple then earlier. HTML5 provides very simple and efficient way to validate any form.

In HTML5 "required" is the keyword to put in any form element to check, whether it has been chosen/selected/entered or not.

For validating a input type, we just have to use "required" keyword to check null value. See below-

   <input name="arvind" type="text"  required>

It is very simple in text input type. But it is not so in select input type.

Let see, how we implement in select in put type. Mechanism is similar but it require some more manipulation in select element.

To use it in select input type, we have to put the some  value in all option of select input and first/top option value should be blank. 

Let see below-

 <select name="dept" required class="form-control">
             <option value="">Select Department</option>
             <option value="Bio-Informatics">Bio-Informatics</option>
              <option value="Bioscience & Biotechnology">Bioscience & Biotechnology</option>
              <option value="Chemical Engineering">Chemical Engineering</option>

  </select>

Enjoy happy coding.

How to install Webmin tool in Ubuntu 16.04

Webmin is a web-based interface for system administration for Unix. Using any modern web browser, you can setup user accounts, Apache, DNS, file sharing and much more. Webmin removes the need to manually edit Unix configuration files like /etc/passwd, and lets you manage a system from the console or remotely. 

Note: I have used Ubuntu 16.04 running on Real Machine to run all of the experiments

Add the Webmin repository so that You can easily install and update Webmin using our package manager. I do this by adding the repository to the /etc/apt/sources.list file.

Type command in terminal -

sudo nano /etc/apt/sources.list

You will get sources.list file in nano editor

and then add this line to the bottom of the file to add the new repository:

deb http://download.webmin.com/download/repository sarge contrib

then pressed ctrl+o to save the file and ctrl+w to exit.

Now add the Webmin PGP key so that your system will trust the new repository:

 run this command on terminal-

wget http://www.webmin.com/jcameron-key.asc

then

sudo apt-key add jcameron-key.asc

after getting ok signal from command I updated the list of repository to include Webmin repositery

sudo apt-get update

Then I Installed the Webmin using command in terminal

sudo apt-get install webmin

after using this command I again stuck on previously faced dependencies problem.

as suggested by system I used command-
sudo apt-get -f install

Finally I installed the Webmin as confirmed by terminal.

Now I tried to open it on browser I got SSL error

(Sorry to not capture the screen) add the exception to the browser and  get the login screen

After login I got the dashboard like-

Now all you system administration is on web based.