View source for Ubuntu Linux Post Install Steps

[[Category:Linux]]

== Introduction ==

Everything on this page needs to be done as root, unless specified, so su to root.

 sudo -i

== Set hostname ==

 hostnamectl set-hostname test0.mgk.ro
 reboot

=== Scaleway === 

If you're on a braindead platform like Scaleway, you might also need to disable this:

 systemctl disable scw-set-hostname

== Package management ==

=== Do not install recommended and suggested packages ===

 cat <<EOT >/etc/apt/apt.conf.d/61norecommends
 APT::Install-Recommends "false";
 APT::Install-Suggests "false"; 
 EOT

== Update the software ==

 apt update && apt -y upgrade
 reboot

== User management ==

=== Create a user (cloud computing) ===

 useradd -c 'Aram Hăvărneanu' -G users -m -s /bin/bash -g staff aram
 passwd -l aram

Enable passwordless sudo for the staff group:

 echo '%staff ALL=(ALL) NOPASSWD:ALL' > /etc/sudoers.d/91-staff-no-password

=== Fix the user created during installation (non-cloud) ===

 usermod -a -G staff aram
 passwd -l aram

Enable passwordless sudo for the staff group:

 echo '%staff ALL=(ALL) NOPASSWD:ALL' > /etc/sudoers.d/91-staff-no-password

=== SSH ===

For ssh access, use su to switch from root to the user and then add ssh keys.

 su - aram
 # as a user
 mkdir -p .ssh
 echo 'ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIJnkro8LT0TS+NTOIB787wfqIwv2VTmXXYsnsoVk71UE aram@horizon.local' >> .ssh/authorized_keys
 echo 'ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIC8dcfsqZJWTNTCfATbD6WiZyWoK3AiihynONRjCrtMw aram@oceanic.local' >> .ssh/authorized_keys
 echo 'ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIMRc0UWKrFpCv/EOUo2jpEQt+C/pa0tc1rUWKgjbKTp7 aram@edengate.local' >> .ssh/authorized_keys
 chmod 700 .ssh
 chmod 644 .ssh/authorized_keys

== Install packages ==

For home installations you might want to install avahi.

 apt install avahi-daemon

For development system you might want to install:

 apt install -y git build-essential clang clang-format clang-tidy