xkb_Caps_hotkeys

Hotkeys CapsLock + ijk; => Up, Left, Down, Right

for Ubuntu 14.04

Work for me

1. Copy xkb folder to "/usr/share/X11/xkb"
2. Run

# apply xkb
setxkbmap -symbols my -print | xkbcomp -I"$HOME/.config/xkb" - "${DISPLAY%%.*}"

# xmodmaps reset after change layout
sudo dpkg-reconfigure xkb-data

Old way:

Create file: ~/.Xmodmap file

clear lock
remove Lock = Caps_Lock
remove Shift = Caps_Lock

keycode 66 = NoSymbol NoSymbol
keycode 66 = Mode_switch

keysym j = j J Left NoSymbol NoSymbol NoSymbol
keysym k = k K Down NoSymbol NoSymbol NoSymbol
keysym i = i I Up NoSymbol NoSymbol NoSymbol
keysym l = l L Right NoSymbol lstroke Lstroke
keysym u = u U BackSpace NoSymbol lstroke Lstroke
keysym o = o O Delete NoSymbol lstroke Lstroke
keysym m = m M Home NoSymbol lstroke Lstroke
keysym comma = comma less End NoSymbol lstroke Lstroke
keysym p = p P Prior NoSymbol lstroke Lstroke
keysym semicolon = semicolon colon Next NoSymbol lstroke Lstroke

Apply changes:

xmodmap ./.Xmodmap 

This settings reset after change keyboard layout

Links:

XKB: перенастроим клавиши под себя любимого http://habrahabr.ru/post/222285/

заметки на «полях» клавиатуры, про xkb http://unixforum.org/index.php?showtopic=49203 (pdf)

Настройка XKB. http://pascal.tsu.ru/other/xkb/

X KeyBoard extension https://wiki.archlinux.org/index.php/XKB

Capslock + HJKL to arrow keys http://superuser.com/questions/96299/mapping-superhjkl-to-arrow-keys-under-x

xkb on maemo - problems generating level3 left and right http://www.spinics.net/lists/xorg/msg35931.html

System wide vim-style (hjkl) navigation (xmodmap) http://shellhell.wordpress.com/2012/01/31/hello-world/

Mapping Super+hjkl to arrow keys under X http://superuser.com/questions/96299/mapping-superhjkl-to-arrow-keys-under-x

Reconfigure keyboard layout - 13.10, 14.04 [duplicate] http://askubuntu.com/questions/436686/reconfigure-keyboard-layout-13-10-14-04