How to remap R_SHIFT to Up Arrow and Menu to Down Arrow on Ubuntu?

I recently move to ubuntu from win10, and my keyboard(Hator rockfall mecha tkl 2) software supporting only in win10, i used this software for remap key(R_SHIFT -> up_arrow; menu -> down_arrow) because i poured juice on her. and i learn programming that's i really need them.

xmodmap -e "keycode 62 = Up"xmodmap -e "keycode 135 = Down"

result:nothing

2.using xkb

create custom keymap

xkb_symbols "basic" {    key <MENU> { [ Down ] };    key <RTSH> { [ Up ] };};

Added to the keymap:

xkb_keymap {    xkb_keycodes  { include "evdev+aliases(qwerty)" };    xkb_types     { include "complete" };    xkb_compat    { include "complete" };    xkb_symbols   { include "pc+us+inet(evdev)+custom(basic)" };    xkb_geometry  { include "pc(pc104)" };};

applied with

xkbcomp -I$HOME/.xkb ~/.xkb/keymap/custom $DISPLAY

result: many type errors

Warning:          Key <I708> not found in evdev+aliases(qwerty) keycodes                  Symbols ignoredNo symbols defined for <I248> (keycode 248)

and more

3. use key mapper

don't defined my keyboards