How can I remap keys in Ubuntu 16.04

Question

I am using an Asus C200 chromebook running Ubuntu 16.04, and I want to know how to remap the F10 button to Volume up, and F9 button to volume down.

Thanks.

Answer 1

This worked for me:

cd /usr/share/X11/xkb/symbol

Make a copy of the file srvr_ctrl somewhere you can restore it if you want

Open it with your favorite editor using sudo

sudo vim srvr_ctrl

Change the lines

symbols[Group1]= [ F10, F10, F10, F10, XF86_Switch_VT_10 ]

To

symbols[Group1]= [ XF86AudioRaiseVolume, F10, F10, F10, XF86_Switch_VT_10 ]

And

symbols[Group1]= [ F9, F9, F9, F9, XF86_Switch_VT_9 ]

To

symbols[Group1]= [ XF86AudioLowerVolume, F9, F9, F9, XF86_Switch_VT_9 ]

Now save, exit, and re-login to your account.