setxkbmap -layout us
.Xmodmap
!  
! Swap Caps_Lock and Control_L
!
remove Lock = Caps_Lock
remove Control = Control_L
keysym Control_L = Caps_Lock
keysym Caps_Lock = Control_L
add Lock = Caps_Lock
add Control = Control_L
!
! Swap Alt_L and Super_L on Mac OS X Host and VirtualBox Linux Guest
! Super_L: "Windows-Key", "Option-Key", ...
!
! remove mod1 = Alt_L
! remove mod4 = Super_L
! keycode 133 = Alt_L
! keycode 64 = Super_L
! add mod1 = Alt_L
! add mod4 = Super_L
.xbindkeysrc
"xvkbd -xsendevent -text '\[Control_L]v'"
    alt + v
"xvkbd -xsendevent -text '\[Control_L]c'"
    alt + c
"xvkbd -xsendevent -text '\[Control_L]t'"
    alt + t
"xvkbd -xsendevent -text '\[Control_L]w'"
    alt + w
"xvkbd -xsendevent -text '\[Control_L]q'"
    alt + q
"xvkbd -xsendevent -text '\[Control_L]z'"
    alt + z
"xvkbd -xsendevent -text '\[Control_L]Z'"
    alt + shift + z
"xvkbd -xsendevent -text '\[Control_L]x'"
    alt + x
    
"xvkbd -xsendevent -text '\[Control_L]r'"
    alt + r
"xvkbd -xsendevent -text '\[Control_L]f'"
    alt + f
"xvkbd -xsendevent -text '\[Control_L]s'"
    alt + s