tux@MIRR:~$ sudo nano /etc/apt/sources.list
tux@MIRR:~$ sudo apt-get update
Hit:1 http://security.debian.org/debian-security stretch/updates InRelease
Hit:2 http://mirrors.kernel.org/debian stretch InRelease
Hit:3 http://mirrors.kernel.org/debian stretch-updates InRelease
Reading package lists... Done
N: Skipping acquire of configured file 'main/binary-1386/Packages' as repository 'http://security.debian.org/debian-security stretch/updates InRelease' doesn't support architecture '1386'
N: Skipping acquire of configured file 'contrib/binary-1386/Packages' as repository 'http://security.debian.org/debian-security stretch/updates InRelease' doesn't support architecture '1386'
N: Skipping acquire of configured file 'non-free/binary-1386/Packages' as repository 'http://security.debian.org/debian-security stretch/updates InRelease' doesn't support architecture '1386'
N: Skipping acquire of configured file 'main/binary-1386/Packages' as repository 'http://mirrors.kernel.org/debian stretch InRelease' doesn't support architecture '1386'
N: Skipping acquire of configured file 'non-free/binary-1386/Packages' as repository 'http://mirrors.kernel.org/debian stretch InRelease' doesn't support architecture '1386'
N: Skipping acquire of configured file 'contrib/binary-1386/Packages' as repository 'http://mirrors.kernel.org/debian stretch InRelease' doesn't support architecture '1386'
N: Skipping acquire of configured file 'main/binary-1386/Packages' as repository 'http://mirrors.kernel.org/debian stretch-updates InRelease' doesn't support architecture '1386'
N: Skipping acquire of configured file 'contrib/binary-1386/Packages' as repository 'http://mirrors.kernel.org/debian stretch-updates InRelease' doesn't support architecture '1386'
N: Skipping acquire of configured file 'non-free/binary-1386/Packages' as repository 'http://mirrors.kernel.org/debian stretch-updates InRelease' doesn't support architecture '1386'
tux@MIRR:~$ cat /etc/apt/sources.list
#

# deb cdrom:[Debian GNU/Linux testing _Stretch_ - Official Snapshot amd64 xfce-CD Binary-1 20160229-01:51]/ stretch main

#deb cdrom:[Debian GNU/Linux testing _Stretch_ - Official Snapshot amd64 xfce-CD Binary-1 20160229-01:51]/ stretch main

deb http://mirrors.kernel.org/debian/ stretch main non-free contrib
# deb-src http://mirrors.kernel.org/debian/ stretch main non-free contrib

deb http://security.debian.org/debian-security stretch/updates main contrib non-free
# deb-src http://security.debian.org/debian-security stretch/updates main contrib non-free

# stretch-updates, previously known as 'volatile'
deb http://mirrors.kernel.org/debian/ stretch-updates main contrib non-free
# deb-src http://mirrors.kernel.org/debian/ stretch-updates main contrib non-free

# stretch-backports, previously on backports.debian.org
# Line commented out by installer because it failed to verify:
#deb http://mirrors.kernel.org/debian/ stretch-backports main contrib non-free
# deb-src http://mirrors.kernel.org/debian/ stretch-backports main contrib non-free
tux@M