Login in Unix

Can anyone plz share the HTML code for login in UNIX.

I am not able to verify the password.

Is your question UNIX specific? It sounds like you are developing a web application, but looking for a way to verify the password of a user that logs in. This verification is done by the programming language the application is developed in and will therefore not be HTML, which is for display purposes. You may need to supply more detail on the issue.

I need to write a code so that i can login in UNIX via web.
here i mean to say, same as i enter login and pwd in unix.. i want now to pass via web. lie a form.
And verify the same.

kindly guide if i can do this.