How to save config files

I usecomplite disk image of linux with linuxcnc to make machine.

Config files of cnc machine are opened to edit to anybody. How to hide config folder and to block rights to edit files?

I'm not good in Linux. May be it's a topic for linux OS forum.

It's very interesting variant with dot, I will use it.
But if somebody will change something, for example scle, it will be seen after some time when something will be broken.
Do I can to make external rights for linuxcnc program and for user cut rights?

Here's a quick run down on chmod to change file permissions

www.computerhope.com/unix/uchmod.htm

I saw function chmod in internet, but I think it's not suits me in such simple way.

I have user login that use program linuxcnc.
If I close permission in such way then opened under "user" linuxcnc will be blocked.
If I could open linuxcnc as program that runs from another log (say CNC) that will have all permissions it will solve my problem.

All you would to do is change the "write" permission. You leave the read & execute permissions just as they are on the file.
It'll still run just fine.

To run it as another login, that logged in user will need read & write permissions to the folder that the ini file is in.

It'll still run just fine.

Or you can run:

sudo chown root:root ini-file-to-protect

Then only root can edit the ini-file.

I ran
sudo chown root:root axis.sim

The output of ls -la axis.sim is:
-rw-r--r-- 1 root root 5924 May 10 18:33 axis.ini
1st group of 3 rw- owner has read & write permissions
2nd group of 3 r-- group has read only permssions
3rd group of 3 r-- other has read only permissions

The first - is a special bit that we don't really need to talk about