Where to save files so that updates don't overwrite them?

Hello,
I need to make some changes to files in the following folder /usr/local/ispconfig/mail/ in order to follow a guide posted here (https://www.howtoforge.com/communit...uto-login-for-ispconfog-administrators.82988/), but I have not found the correct place to save the changed files. Can anybody help me?
I saw that the configuration files are saved in server /conf-custom, but this folder would be to overwrite the /server/conf files?

Thanks.

 

I think you need to find this forum message:
Where to save files so that updates don't overwrite them?
This update stuff, by the way, is mentioned in the last message of the forum thread you linked to in your message.

 

Does that guide also work with interface files? I tried to do it with the php files mentioned in the forum but I had no results.

 

Just complementing the previous answer:

I did the procedure to persist the changes in dovecot. The question is about the file /usr/local/ispconfig/interface/web/mail/webmailer.php

 

1.You can simply choose yes to backup during your ISPConfig software update to keep your modified copy of the file with it. OR
2. You can use conf-custom to keep that copy as it wouldn't be overwritten simply by creatively creating another folder and keep its copy in there. OR
3. You can use chattr command to protect the modified file but I do not recommend using it since there may be a security update to that file later on. OR
4. You can also request that as a feature in ISPConfig.