PPA 404 error when installing Flux on Ubuntu 13.10

Whenever I try and Install Flux (in terminal) and I type in "sudo apt-get update", it says:

Failed to fetch http://ppa.launchpad.net/kilian/f.lux/ubuntu/dists/saucy/main/binary-i386/Packages  404  Not Found. 

Solution 1:

There was no official flex gui for saucy.So try to install flex-gui from raring.Follow the simple steps given below to install flex-gui in ubuntu 13.10.

• Run the below commands,(if you already do this,skip to the next step)

  sudo add-apt-repository ppa:kilian/f.lux
  sudo apt-get update
  

• Run the below command to edit kilian-f_lux-raring.list file,

  sudo gedit /etc/apt/sources.list.d/kilian-f_lux-saucy.list
  

  And delete all the lines in that file ,add the below lines and save the file.

  deb http://ppa.launchpad.net/kilian/f.lux/ubuntu raring main
  # deb-src http://ppa.launchpad.net/kilian/f.lux/ubuntu raring main
  

• Update the software repositories and then install flex-gui

  sudo apt-get update
  sudo apt-get install fluxgui
  

Solution 2:

Did you get the links from here: http://justgetflux.com/linux.html

I noticed a set of instructions there. The ppa you have above does go 404. Maybe try the instructions on the site I linked.

Edit: I noticed this comment on the page so I think this is your issue. Check the page in the link.:

fluxgui has not been officially updated for Ubuntu 13.10 (saucy salamander) yet.