/usr/share/X11/xkb/symbols/ctrl is in xkb-data 2.23.1-1ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 | // Eliminate CapsLock, making it another Ctrl.
partial modifier_keys
xkb_symbols "nocaps" {
replace key <CAPS> { [ Control_L, Control_L ] };
modifier_map Control { <CAPS>, <LCTL> };
};
// Make the left Ctrl key a left Meta.
xkb_symbols "lctrl_meta" {
replace key <LCTL> { [ Meta_L ] };
modifier_map Mod4 { <LCTL> };
};
// Swap the functions of the CapsLock key and the left Ctrl key.
partial modifier_keys
xkb_symbols "swapcaps" {
replace key <CAPS> { [ Control_L ] };
replace key <LCTL> { [ Caps_Lock ] };
modifier_map Control { <CAPS> };
modifier_map Lock { <LCTL> };
};
// Move Ctrl to the leftmost key on the middle row and CapsLock to the
// leftmost key on the bottom row. Only works if the geometry or keycodes
// file has defined appropriate aliases for the keys in question.
partial modifier_keys
xkb_symbols "ac_ctrl" {
replace key <AC00> { [ Control_L ] };
replace key <AA00> { [ Caps_Lock ] };
modifier_map Control { <AC00> };
modifier_map Lock { <AA00> };
};
// Move Ctrl to the leftmost key on the bottom row and CapsLock to the
// leftmost key on the middle row. Only works if the geometry or keycodes
// file has defined appropriate aliases for the keys in question.
partial modifier_keys
xkb_symbols "aa_ctrl" {
replace key <AA00> { [ Control_L ] };
replace key <AC00> { [ Caps_Lock ] };
modifier_map Control { <AA00> };
modifier_map Lock { <AC00> };
};
// Right Ctrl functions as another right Alt.
partial modifier_keys
xkb_symbols "rctrl_ralt" {
key <RCTL> { symbols[Group1]= [ Alt_R ] };
modifier_map Mod1{ <RCTL> };
};
// Menu key functions as another right Ctrl.
partial modifier_keys
xkb_symbols "menu_rctrl" {
replace key <MENU> { [ Control_R, Control_R ] };
modifier_map Control { Control_L, <MENU> };
};
// Right Alt key functions as another right Ctrl.
partial modifier_keys
xkb_symbols "ralt_rctrl" {
replace key <RALT> { type[Group1] = "TWO_LEVEL",
symbols[Group1] = [ Control_R, Control_R ] };
modifier_map Control { <RALT> };
};
// Swap the functions of the left Alt key and the left Ctrl key.
partial modifier_keys
xkb_symbols "swap_lalt_lctl" {
replace key <LALT> { [ Control_L, Control_L ] };
replace key <LCTL> { [ Alt_L, Meta_L ] };
modifier_map Mod1 { <LCTL> };
modifier_map Control { <LALT> };
};
// Swap the functions of the left Win key and the left Ctrl key.
partial modifier_keys
xkb_symbols "swap_lwin_lctl" {
replace key <LWIN> { [ Control_L ] };
replace key <LCTL> { [ Super_L ] };
modifier_map Mod4 { <LCTL> };
modifier_map Control { <LWIN> };
};
// Swap the functions of the right Win key and the right Ctrl key.
partial modifier_keys
xkb_symbols "swap_rwin_rctl" {
replace key <RWIN> { [ Control_R ] };
replace key <RCTL> { [ Super_R ] };
modifier_map Mod4 { <RCTL> };
modifier_map Control { <RWIN> };
};
// Map Ctrl to the left Alt key, Alt to the left Win key,
// and Super to the left Ctrl key.
partial modifier_keys
xkb_symbols "swap_lalt_lctl_lwin" {
replace key <LALT> { [ Control_L, Control_L ] };
replace key <LWIN> { [ Alt_L, Meta_L ] };
replace key <LCTL> { [ Super_L ] };
modifier_map Mod1 { <LWIN> };
modifier_map Mod4 { <LCTL> };
modifier_map Control { <LALT> };
};
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