Password:
root@siduxbox:~# sudo kwrite /etc/apt/sources.list
kwrite: cannot connect to X server
root@siduxbox:~# sudo kate /etc/apt/sources.list
kate: cannot connect to X server
root@siduxbox:~# sudo cat /etc/apt/sources.list
# See sources.list(5) for more information, especially
# Remember that you can only use http, ftp or file URIs
# CDROMs are managed through the apt-cdrom tool.
# The /etc/apt/sources.list.d/ directory provides a way to add sources.list
# entries in seperate files that end with sources.list file.

# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #
# Please use /etc/apt/sources.list.d/ instead and create a seperate *.list    #
# file for each server, like:                                                 #
#      /etc/apt/sources.list.d/debian.list                                    #
#      /etc/apt/sources.list.d/sidux.list                                     #
#      /etc/apt/sources.list.d/foo.list                                       #
#      /etc/apt/sources.list.d/bar.list                                       #
# containing the actual deb/ deb-src stanzas for the desired suites and       #
# repositories.                                                               #
# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #

#deb http://ftp.us.debian.org/debian/ sid main contrib non-free
#deb-src http://ftp.us.debian.org/debian/ sid main contrib non-free

#deb http://ftp.us.debian.org/debian/ testing main contrib non-free
#deb-src http://ftp.us.debian.org/debian/ testing main contrib non-free

#deb http://ftp.us.debian.org/debian/ experimental main contrib non-free
#deb-src http://ftp.us.debian.org/debian/ experimental main contrib non-free

#deb http://sidux.com/debian/ sid main contrib non-free firmware fix.main fix.contrib fix.non-free
#deb-src http://sidux.com/debian/ sid main contrib non-free firmware fix.main fix.contrib fix.non-free
root@siduxbox:~#