/etc/cloud/templates/sources.list.debian.tmpl is in cloud-init 0.7.6~bzr976-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 | \## Note, this file is written by cloud-init on first boot of an instance
\## modifications made here will not survive a re-bundle.
\## if you wish to make changes you can:
\## a.) add 'apt_preserve_sources_list: true' to /etc/cloud/cloud.cfg
\## or do the same in user-data
\## b.) add sources in /etc/apt/sources.list.d
\## c.) make changes to template file /etc/cloud/templates/sources.list.debian.tmpl
\###
# See http://www.debian.org/releases/stable/i386/release-notes/ch-upgrading.html
# for how to upgrade to newer versions of the distribution.
deb $mirror $codename main contrib non-free
deb-src $mirror $codename main contrib non-free
\## Major bug fix updates produced after the final release of the
\## distribution.
deb $security $codename/updates main contrib non-free
deb-src $security $codename/updates main contrib non-free
deb $mirror $codename-updates main contrib non-free
deb-src $mirror $codename-updates main contrib non-free
\## Uncomment the following two lines to add software from the 'backports'
\## repository.
\## N.B. software from this repository may not have been tested as
\## extensively as that contained in the main release, although it includes
\## newer versions of some applications which may provide useful features.
# deb http://backports.debian.org/debian-backports $codename-backports main contrib non-free
# deb-src http://backports.debian.org/debian-backports $codename-backports main contrib non-free
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