Is there an Autoit replacement?

Question

Computer networks

Greetings! Switched from Win to Ubuntu and found that autoit (winapi and all) does not work.
What can replace it?
Previously, it performed the following:
- gui-window of the program with elements of start and stop of execution
- at start it "attached" to the open browser window (ie / ff) and performed a banal check / click
- at any time you can stop the program and do something yourself enter
I read about selenium, but somehow everything is complicated there and it seems that it is impossible to start and interrupt the execution of the program at any time.

Answer 1

As one of the options - Sikuli

Answer 2

- gui-window of the program with elements of start and stop execution

Change your approach, in Linux 99% of the actions can be done from the console, and the GUI is just a shell.

- at startup, "attached" to the open browser window (ie / ff) and performed a banal check / click

Discover POST and GET requests with curl or wget.

- at any time you can stop the program and enter something yourself

This practically disappears, it is described in paragraph 1.
Further depends on the specific task.