Thread: sources.list -- should i modify?

i've got amazon ec2 instance running natty 11.04. want harden server , make sure it's secure handling sensitive data. i'm wondering should in /etc/apt/sources.list. can comment on these contents? or, better yet, recommend secure sources.list file?

code:

## note, file written cloud-init on first boot of instance  ## modifications made here not survive re-bundle.  ## if wish make changes can:  ## a.) add 'apt_preserve_sources_list: true' /etc/cloud/cloud.cfg  ##     or same in user-data  ## b.) add sources in /etc/apt/sources.list.d  ## c.) make changes template file /etc/cloud/templates/sources.list.tmpl  #    # see http://help.ubuntu.com/community/upgradenotes how upgrade  # newer versions of distribution.  deb http://us-west-1.ec2.archive.ubuntu.com/ubuntu/ natty main  deb-src http://us-west-1.ec2.archive.ubuntu.com/ubuntu/ natty main    ## major bug fix updates produced after final release of  ## distribution.  deb http://us-west-1.ec2.archive.ubuntu.com/ubuntu/ natty-updates main  deb-src http://us-west-1.ec2.archive.ubuntu.com/ubuntu/ natty-updates main    ## n.b. software repository entirely unsupported ubuntu  ## team. also, please note software in universe not receive  ## review or updates ubuntu security team.  deb http://us-west-1.ec2.archive.ubuntu.com/ubuntu/ natty universe  deb-src http://us-west-1.ec2.archive.ubuntu.com/ubuntu/ natty universe  deb http://us-west-1.ec2.archive.ubuntu.com/ubuntu/ natty-updates universe  deb-src http://us-west-1.ec2.archive.ubuntu.com/ubuntu/ natty-updates universe    ## n.b. software repository entirely unsupported ubuntu  ## team, , may not under free licence. please satisfy  ## rights use software. also, please note software in  ## multiverse not receive review or updates ubuntu  ## security team.  # deb http://us-west-1.ec2.archive.ubuntu.com/ubuntu/ natty multiverse  # deb-src http://us-west-1.ec2.archive.ubuntu.com/ubuntu/ natty multiverse  # deb http://us-west-1.ec2.archive.ubuntu.com/ubuntu/ natty-updates multiverse  # deb-src http://us-west-1.ec2.archive.ubuntu.com/ubuntu/ natty-updates multiverse    ## uncomment following 2 lines add software 'backports'  ## repository.  ## n.b. software repository may not have been tested  ## extensively contained in main release, although includes  ## newer versions of applications may provide useful features.  ## also, please note software in backports not receive review  ## or updates ubuntu security team.  # deb http://us-west-1.ec2.archive.ubuntu.com/ubuntu/ natty-backports main restricted universe multiverse  # deb-src http://us-west-1.ec2.archive.ubuntu.com/ubuntu/ natty-backports main restricted universe multiverse    ## uncomment following 2 lines add software canonical's  ## 'partner' repository.  ## software not part of ubuntu, offered canonical ,  ## respective vendors service ubuntu users.  # deb http://archive.canonical.com/ubuntu natty partner  # deb-src http://archive.canonical.com/ubuntu natty partner    deb http://security.ubuntu.com/ubuntu natty-security main  deb-src http://security.ubuntu.com/ubuntu natty-security main  deb http://security.ubuntu.com/ubuntu natty-security universe  deb-src http://security.ubuntu.com/ubuntu natty-security universe  # deb http://security.ubuntu.com/ubuntu natty-security multiverse  # deb-src http://security.ubuntu.com/ubuntu natty-security multiverse

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