Fixing Dell Inspiron 3162 PgUp/PgDn/Home/End keys issue in Ubuntu

1. Create file /etc/udev/hwdb.d/95-custom-keyboard.hwdb
2. File contents must be
   
   # Dell Inspiron 3162
evdev:atkbd:dmi:bvn*:bvr*:bd*:svnDell*:pnInspiron*3162:pvr*
 KEYBOARD_KEY_c7=!home
 KEYBOARD_KEY_cf=!end
 KEYBOARD_KEY_c9=!pageup
 KEYBOARD_KEY_d1=!pagedown
   

Important! There must be a space before KEYBOARD_KEY keyword.
 
3. After editing the file, run the hwdb re-index:
   
   sudo udevadm hwdb --update && sudo sudo udevadm trigger

Source: http://wiki.archlinux.org/index.php/Dell_Inspiron_11_3000_(3162)