How automate a process than I must do in a web page

Hello everyone I'm here asking if someone can help me to know if there's a program to help me to make a repetitive process made it on web page developed in Java.

The process is:

(After login and I don't need automate this step) Select an input text then paste a value after that click on a button and then click in other button, but I need to know if exists some tool than can help me to do that withouth intervention.

Actually I'm working on Linux (Ubuntu) I made some searchs in google but wasn't satisfactory

Thanks to all for your help.