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Kim Stacks
Asked: 2018-09-23 19:15:51 +0800 CST

how to check if official Debian/Ubuntu apt repositories are enabled in /etc/apt/sources.list?

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I was following iRedmail documentation and came across this line

iRedMail needs official Debian/Ubuntu apt repositories, please enable them in /etc/apt/sources.list.

How do I go about checking if this is true?

I am using 16.04 headless server edition

apt 16.04

1 Answers

  1. Tested with 16.04 Ubuntu headless

    cat /etc/apt/sources.list

    You should see something like 

    ## 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.tmpl

# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to
# newer versions of the distribution.
deb http://ap-southeast-1.ec2.archive.ubuntu.com/ubuntu/ xenial main restricted
deb-src http://ap-southeast-1.ec2.archive.ubuntu.com/ubuntu/ xenial main restricted

## Major bug fix updates produced after the final release of the
## distribution.
deb http://ap-southeast-1.ec2.archive.ubuntu.com/ubuntu/ xenial-updates main restricted
deb-src http://ap-southeast-1.ec2.archive.ubuntu.com/ubuntu/ xenial-updates main restricted

## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
## team. Also, please note that software in universe WILL NOT receive any
## review or updates from the Ubuntu security team.
deb http://ap-southeast-1.ec2.archive.ubuntu.com/ubuntu/ xenial universe
deb-src http://ap-southeast-1.ec2.archive.ubuntu.com/ubuntu/ xenial universe
deb http://ap-southeast-1.ec2.archive.ubuntu.com/ubuntu/ xenial-updates universe
deb-src http://ap-southeast-1.ec2.archive.ubuntu.com/ubuntu/ xenial-updates universe

## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
## team, and may not be under a free licence. Please satisfy yourself as to
## your rights to use the software. Also, please note that software in
## multiverse WILL NOT receive any review or updates from the Ubuntu
## security team.
deb http://ap-southeast-1.ec2.archive.ubuntu.com/ubuntu/ xenial multiverse
deb-src http://ap-southeast-1.ec2.archive.ubuntu.com/ubuntu/ xenial multiverse
deb http://ap-southeast-1.ec2.archive.ubuntu.com/ubuntu/ xenial-updates multiverse
deb-src http://ap-southeast-1.ec2.archive.ubuntu.com/ubuntu/ xenial-updates multiverse

## 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.
## Also, please note that software in backports WILL NOT receive any review
## or updates from the Ubuntu security team.
deb http://ap-southeast-1.ec2.archive.ubuntu.com/ubuntu/ xenial-backports main restricted universe multiverse
deb-src http://ap-southeast-1.ec2.archive.ubuntu.com/ubuntu/ xenial-backports main restricted universe multiverse

deb http://security.ubuntu.com/ubuntu xenial-security main restricted
deb-src http://security.ubuntu.com/ubuntu xenial-security main restricted
deb http://security.ubuntu.com/ubuntu xenial-security universe
deb-src http://security.ubuntu.com/ubuntu xenial-security universe
deb http://security.ubuntu.com/ubuntu xenial-security multiverse
deb-src http://security.ubuntu.com/ubuntu xenial-security multiverse

## Uncomment the following two lines to add software from Canonical's
## 'partner' repository.
## This software is not part of Ubuntu, but is offered by Canonical and the
## respective vendors as a service to Ubuntu users.
# deb http://archive.canonical.com/ubuntu xenial partner
# deb-src http://archive.canonical.com/ubuntu xenial partner

    Usually the repositories with the description main are the official supported repositories.

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