If the provider offers a “minimal” default installation of “Ubuntu 22.04 (Jammy Jellyfish)”, this can be taken as base system. Further package deinstallation is more trouble than it’s worth. Independent from the provider also exists a minimalistic Ubuntu server distribution as base to install: Ubuntu Server 22.04 LTS
Integrate package repositories
(To deepen see also: Wiki)
It is recommended to use a mirror server in the area instead of the Canonical server, since mostly the connection is faster, and cost and bandwidth for the main server will be reduced. The example server chosen here is located in Germany (Aachen), making it suitable for central Europe.
Hint: Many Ubuntu installations use the command
sudo to get administrator permissions. In this case in front of the commands mentioned here, the word
sudo must be typed. In the next tutorial part „User + SSH“ we will configure a fully-fledged root account, and sudo will become obsolete.
Actual list of official mirror servers: https://launchpad.net/ubuntu/+archivemirrors
/etc/apt/sources.list (Wiki: https://help.ubuntu.com/community/Repositories/CommandLine)
(Hint: Repositories which are needed only sometime or optional explanatory notes can be commented out with the # character at the beginning of a line.)
deb http://ftp.halifax.rwth-aachen.de/ubuntu jammy main restricted universe multiverse deb http://ftp.halifax.rwth-aachen.de/ubuntu jammy-updates main restricted universe multiverse deb http://ftp.halifax.rwth-aachen.de/ubuntu jammy-security main restricted universe multiverse deb http://ftp.halifax.rwth-aachen.de/ubuntu jammy-backports main restricted universe multiverse
After changing the repositories, the new selection must be loaded again into the package manager:
Install Software Packages
Most likely in the new choosen repositories updates are available for some packages. These should be installed first of all:
Install the following packages (and their dependencies) with:
apt-get install mariadb-server mono-complete tmux
Remark: On very minimalistic Ubuntu installations probably the package “vim” must be installed if you want to use the “vi” command (as in the examples here).
Continued: Manage user accounts and hardening SSH