How can the algorithm be implemented in a Custom script?

Question

teamcity

There is a task.
If done by hand, then it looks like this
Step one.
cat .EX
Step two. Let's open the file:
vim <EX>/app/user/local.py
Step three. Next, we usually manually change one line in the exaple1 file
to example2 and save the changes.
Step four - execute the following command:
supervisorctl -c <EX>/conf/d/sord.conf restart all

How this algorithm can be implemented in a Custom script in the TeamCity build settings &