By default, the Ubuntu package will come with the configuration file pointing at ntp.ubuntu.com and the ubuntu.pool.ntp.org as NTP pools to provide 6 dual-stack NTP sources and 2 additional IPv4-only sources.

Open the DASH and type software you will see one option that says software sources You will see that it will have several tabs that each one adds up to the amount of repository lines in your sources.list , for example you have the Ubuntu is an open source software operating system that runs from the desktop, to the cloud, to all your internet connected things. Download Ubuntu desktop, Ubuntu Server, Ubuntu for Raspberry Pi and IoT devices, Ubuntu Core and all the Ubuntu flavours. Ubuntu is an open-source software platform that runs everywhere from the PC to the server and the cloud. Sample etc apt sources list file for Ubuntu 16.04 Xenial. The Following is a sample default Ubuntu apt sources list file you can use as the software repository in Ubuntu 16.04 Xenial. If your current /etc/apt/sources.list file is broken, Then replace it with following.

Procedure¶. Follow these steps to run MongoDB Community Edition on your system. These instructions assume that you are using the official mongodb-org package – not the unofficial mongodb package provided by Ubuntu – and are using the default settings.

Jan 22, 2013 · How to Generate A New Sources List For Ubuntu By Damien / Jan 22, 2013 / Linux If you have ever peeked into the “sources.list” file located at the “/etc/apt/” folder, you will know that it contains the repository of all the packages available to your machine. By default, the Ubuntu package will come with the configuration file pointing at ntp.ubuntu.com and the ubuntu.pool.ntp.org as NTP pools to provide 6 dual-stack NTP sources and 2 additional IPv4-only sources. Ubuntu 20.10 Moving Ahead In Restricting Access To dmesg. Following the discussions last month over restricting access to dmesg / kernel logs on Ubuntu in matching the behavior of other Linux distributions for better security practices, Ubuntu 20.10 indeed is moving forward with these plans where dmesg access would require root privileges. For the purpose of this tutorial we are only mirroring packages or repositories from archive.ubuntu.com; of course you can add other unofficial repositories in the mirror.list file in the server, but then you have to re-run apt-mirror there and edit on any client the sources.list file accordingly.

Ubuntu Software will then check your software sources for new updates. Most repositories provide a signing key to be able to verify downloaded packages. So in addition to the steps above, you should follow possible instructions on how to download and install the signing key (GPG key).

Sources List Generator for Ubuntu, Xubuntu, Kubuntu, Edubuntu, Ubuntu Server and other Ubuntu-based distros. It features the official Canonical one repositories as well as other 3rd party repos.