~/.config/openbox/lubuntu-rc.xml 파일을 수정한다. 아래는 내가 수정한 부분 발췌.
화면 잠금 키 변경. 기본은 Ctrl + Alt + l 이었다.
<!-- Lock the screen on Window + l-->
<keybind key="W-l">
<action name="Execute">
<command>lxsession-default lock</command>
</action>
</keybind>
audio 제어
<keybind key="W-F8">
<action name="Execute">
<command>pactl set-sink-mute @DEFAULT_SINK@ 0</command>
</action>
<action name="Execute">
<command>pactl set-sink-volume @DEFAULT_SINK@ +3%</command>
</action>
</keybind>
<keybind key="W-F7">
<action name="Execute">
<command>pactl set-sink-mute @DEFAULT_SINK@ 0</command>
</action>
<action name="Execute">
<command>pactl set-sink-volume @DEFAULT_SINK@ -3%</command>
</action>
</keybind>
<keybind key="W-F6">
<action name="Execute">
<command>pactl set-sink-mute @DEFAULT_SINK@ toggle</command>
</action>
</keybind>
<keybind key="W-F5">
<action name="Execute">
<command>audacious -t</command>
</action>
</keybind>
참조 : https://help.ubuntu.com/community/Lubuntu/Keyboard