Run G-Code on application shutdown

its a hidden file in your home directory the dot(.) before it tells you its a hidden file.

if you open up your file / folder viewer, and turn on hidden files you will be able to see all the hidden files in the folder.

if you open the terminal and you type:
ls -a

it will list ALL files, including the hidden files and you can open them with your preferred text editor (I like / use geany, each to their own).

here is the manual / useful info on the file
linuxcnc.org/docs/devel/html/gui/axis.html#sub:axis-axisrc

linuxcnc.org/docs/devel/html/gui/axis.ht..._customization_hints

most people DON'T modify the axisrc file, but instead I believe use the USER_COMMAND file option such as you will see many examples of code on the forum for axis mods
linuxcnc.org/docs/devel/html/gui/axis.html#_user_command_file

like this sort of a thing, that way you dont break axis and can test and undo things + if you have multiple configurations (like I do) the vanilla axis for lathe, mill and router is always the same underneath 
forum.linuxcnc.org/21-axis/45365-how-to-...nterface-axis#238007

Thanks for the tip or the explanation

but unfortunately I can not find the file ".axisrc"
then someone show me the exact path?

I have now found it !