1. install xbindkeys in Synaptic or in terminal: sudo apt-get install xbindkeys xbindkeys-config
2. execute this in terminal: xbindkeys --defaults > ~/.xbindkeysrc
3. to open xbindkeys GUI, execute this in terminal: xbindkeys-config
4. press the "New" button on bottom to create a new keybinding
5. the basics:
Name: Mute
Action: amixer sset Master toggle
Name: Increase volume
Action: amixer sset Master 1+ unmute
Name: Decrease volume
Action: amixer sset Master 1- unmute
6. after entering each "Name/Action" pair, press the "Get Key" button on right ( you may need to maximize the blank white window that opens),
press the key or combination of keys you want, and it will capture it for you; then hit the "Apply" button on right
7. go to "File" tab in upper left corner and hit "Save to default File" in the dropdown menu
8. Add "xbindkeys &" to your autostart.sh so it runs on startup
Finished.
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