title_body: How to update the firmware for a K3 Kindle keyboard from Linux?
upvoted_answer: the K3 automounted fine:
  
  thufir@dur:/media/thufir/Kindle$ 
  thufir@dur:/media/thufir/Kindle$ ls -al
  total 44
  drwxr-xr-x  6 thufir thufir 8192 Dec 31  1969 .
  drwxr-x---+ 4 root   root   4096 Dec 28 10:41 ..
  drwxr-xr-x  2 thufir thufir 8192 Nov 24 17:51 audible
  drwxr-xr-x  2 thufir thufir 8192 Nov 24 17:51 documents
  drwxr-xr-x  2 thufir thufir 8192 Nov 24 17:51 music
  drwxr-xr-x  4 thufir thufir 8192 Dec 28 10:37 system
  thufir@dur:/media/thufir/Kindle$ 
  thufir@dur:/media/thufir/Kindle$ cp /home/thufir/Downloads/Update_kindle_3.4_3.4.2_B006.bin .
  thufir@dur:/media/thufir/Kindle$ 
  thufir@dur:/media/thufir/Kindle$ cd
  thufir@dur:~$ 
  
  
  Then I unmounted the K3.  But, there's no update option. Registration shows:
  
  Registration
  Wi-Fi
  Voice Guide
  Device Password
  Device Info
  
  
  then menu, select settings, then menu again for the update option.