dragon3025 Linux has a different permissions system than Windows. Files have Read Write and eXecute permissions that apply to owner user, group, and "other users"
Files have an owner and a group. If you go to where those files are and do: ls -la
If will show you what permissions those files have (looking like -r--rwxr-- maybe).
It is likely those files "belong" to a different user than you (Linux runs many systems and services as their own users to limit their scope) and it is likely that the "other users" permissions don't allow Writing.
You could navigate to the directory those files are in (with the cd command) and run this:
chmod 777 ./*.cfg
That will make those files (every file that ends with a .cfg in that directory), have permissions RWX (Read, write, and eXecutable) for everyone (user, group, and other users). That IS overkill and isn't necessarily advisable, you'd be better off adding the least amount of permissions necessary, or adding your user to the group that owns the files.
