If you want to edit or modify PDF or form on Ubuntu, you may find LibreOffice is a good tool to try before investigating other tools.
Simply, open a terminal (Ctrl + Alt + T) and navigate to your PDF path. Then, type the following:
libreoffice <pdf_name.pdf>
![[Solved] Problem](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEje20iJAPIbIX1PZULp-EXgepO-GVsevfCugvBRpCJdV2y274BxlPRKfHM_ZzTlJpaYOk4Y9tI8Fi6qpq0qK478VAZygGgvpuTeruwbWqeehDMampdRoQozmfGmQVZq2-HR5i1IkHt5kpwT/s400/Solved.jpg)
The main idea of the blog is to share solutions for problems I faced before.