Swap the left Ctrl and left Alt keys while replacing the Caps key with the Ctrl key (Linux, Ubuntu)

CTRL key settings I want

• No Caps key required (I don't feel like losing if I vote on the necessity)
• Ctrl key is A's side (If I can rewind the time, tell the person who first put the Ctrl key in the lower left corner of the keyboard to rethink)
• I found it incredibly easy to press the Ctrl key (usually the Alt / Meta key is seated) with my left thumb. (The editor I usually use is Vim and not Emacs, so it doesn't matter if Alt (Meta) is a little far away.)

point

• Use the "set xkbmap" command to set key replacement / replacement.
• The method of executing the command set at X startup differs depending on the environment.

Tried environment

• Ubuntu 19.04

procedure

1. Replace / replace Ctrl key with setxkbmap

"Replace Caps key with Ctrl key" and "Swap left Alt key and left Ctrl key" have the following options predefined, so you can use them.

• Replace "ctrl: nocaps" Caps key with Ctrl key
• "Ctrl: swap_lalt_lctl" Swap the left Alt key and Ctrl key

Specify the above option when executing "set xkbmap"

$ setxkbmap -option "ctrl:nocaps" -option "ctrl:swap_lalt_lctl"

Check with set xkbmap -print to see if the settings have been made (xkb_symbols)

$ setxkbmap -print
xkb_keymap {
	xkb_keycodes  { include "evdev+aliases(qwerty)"	};
	xkb_types     { include "complete"	};
	xkb_compat    { include "complete"	};
	★xkb_ctrl specified in symbols(nocaps)And ctrl(swap_lalt_lctl)Can be confirmed that has been added
	xkb_symbols   { include "pc+us+us:2+inet(evdev)+ctrl(nocaps)+ctrl(swap_lalt_lctl)"	};
	xkb_geometry  { include "pc(pc105)"	};
};

2. Enable this setting every time you start X

For Ubuntu

Launch "gnome-session-properties" and press "Add" to add "set xkbmap -option" ctrl: nocaps "-option" ctrl: swap_lalt_lctl ""

In other cases

In recent Raspbian, ~ / .config / lxsession / LXDE-pi / autostart which was based on LXDE cannot be used, so write it in a shell script, register it as a service in systemd, and execute it.

Note

• Replacing the Ctrl key with the Caps key was realized by specifying "ctrl: nocaps" in XKBOPTIONS of / etc / default / keyboard, but when multiple options are specified, only the first one is valid. Did not

• The setxkbmapsetting items are placed as files in/ usr / share / X11 / xkb / symbols /

• Definition of option items of ctrl and their contents are written in / usr / share / X11 / xkb / symbols / in setxkbmap / ctrl.

• If you want to set other than the existing options, you can rewrite here.

• It is just an individual impression.