How to use xbindkeys?

I am trying to run Chromium when "Ctrl + shift + Alt + p" is pressed. I Install xbindkeys and xbindkey-config. Next, creating a file at home directory (touch ~/.xbindkeysrc), then set it as default (xbindkeys --defaults > /home/pi/xbindkeysrc). Then added this code to the file: "chromium" F8 | m:OxO + c:74 Following [Archlinux's tutorial](https://wiki.archlinux.org/index.php/Xbindkeys) , I used xbindkeys --poll-rc to reload the configuration file and apply the changes. Finally killed and reload the xbindkeys(killall xbindkeys; xbindkeys). But, when F8 is pressed, Chromium does not launch on the Raspberry Pi