How to edit any configuration file

While editing any configuration file please check if Jelastic lines as shown in the screenshot is present or not.
If Jelastic lines are present then remove those two lines and then make the required changes, save and restart the services.

These are the below example of conf files as shown below for your reference.

1) How to edit php-fpm config
2) How to edit Apache config

and other config files.

1 ) How to edit the php-fpm config file

2 ) How to edit Apache config

In this way, if you want to edit any other config files for that check and remove these two Jelastic lines then save and restart the required service.