Xmodmap

xev | grep keycode

!!! Caps_Lock => Control_L
remove Lock = Caps_Lock
keysym Caps_Lock = Control_L
add Control = Control_L

!!! Prior/Next
!keysym End = Prior
!keysym Insert = Next

!!! Control_L => Caps_Lock
!remove Control = Control_L
!keysym Control_L = Caps_Lock
!add Lock = Caps_Lock

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