Ubuntu/22

os-release

/etc/os-release

PRETTY_NAME="Ubuntu 22.04.5 LTS"
NAME="Ubuntu"
VERSION_ID="22.04"
VERSION="22.04.5 LTS (Jammy Jellyfish)"
VERSION_CODENAME=jammy
ID=ubuntu
ID_LIKE=debian
HOME_URL="https://www.ubuntu.com/"
SUPPORT_URL="https://help.ubuntu.com/"
BUG_REPORT_URL="https://bugs.launchpad.net/ubuntu/"
PRIVACY_POLICY_URL="https://www.ubuntu.com/legal/terms-and-policies/privacy-policy"
UBUNTU_CODENAME=jammy

Display

hostnamectl

Change

hostnamectl set-hostname example.net

hostnamectl set-hostname "example production server" --pretty

apt install cloud-init

vim /etc/cloud/cloud.cfg
 preserve_hostname: true

ref: https://wiki.crowncloud.net/?How_to_Change_Hostname_on_Ubuntu_22_04

apt sources.list

/etc/apt/sources.list

# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to
# newer versions of the distribution.
deb http://us.archive.ubuntu.com/ubuntu jammy main restricted
# deb-src http://us.archive.ubuntu.com/ubuntu jammy main restricted

#  # Major bug fix updates produced after the final release of the
#  # distribution.
deb http://us.archive.ubuntu.com/ubuntu jammy-updates main restricted
# deb-src http://us.archive.ubuntu.com/ubuntu jammy-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://us.archive.ubuntu.com/ubuntu jammy universe
# deb-src http://us.archive.ubuntu.com/ubuntu jammy universe
deb http://us.archive.ubuntu.com/ubuntu jammy-updates universe
# deb-src http://us.archive.ubuntu.com/ubuntu jammy-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://us.archive.ubuntu.com/ubuntu jammy multiverse
# deb-src http://us.archive.ubuntu.com/ubuntu jammy multiverse
deb http://us.archive.ubuntu.com/ubuntu jammy-updates multiverse
# deb-src http://us.archive.ubuntu.com/ubuntu jammy-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://us.archive.ubuntu.com/ubuntu jammy-backports main restricted universe multiverse
# deb-src http://us.archive.ubuntu.com/ubuntu jammy-backports main restricted universe 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://us.archive.ubuntu.com/ubuntu jammy-security main restricted
# deb-src http://us.archive.ubuntu.com/ubuntu jammy-security main restricted
deb http://us.archive.ubuntu.com/ubuntu jammy-security universe
# deb-src http://us.archive.ubuntu.com/ubuntu jammy-security universe
deb http://us.archive.ubuntu.com/ubuntu jammy-security multiverse
# deb-src http://us.archive.ubuntu.com/ubuntu jammy-security multiverse

simplified apt sources.list

deb http://archive.ubuntu.com/ubuntu jammy main restricted universe multiverse

deb http://archive.ubuntu.com/ubuntu jammy-updates main restricted universe multiverse

deb http://archive.ubuntu.com/ubuntu jammy-security main restricted universe multiverse

Standard Sample

# Main Ubuntu repositories
deb http://ubuntu.com jammy main restricted
deb http://ubuntu.com jammy-updates main restricted
deb http://ubuntu.com jammy universe
deb http://ubuntu.com jammy-updates universe
deb http://ubuntu.com jammy multiverse
deb http://ubuntu.com jammy-updates multiverse

# Ubuntu security updates
deb http://ubuntu.com jammy-security main restricted
deb http://ubuntu.com jammy-security universe
deb http://ubuntu.com jammy-security multiverse

# Backports and Partner (Optional)
deb http://ubuntu.com jammy-backports main restricted universe multiverse
# deb http://archive.canonical.com/ubuntu jammy partner

Complete Source.list

deb http://archive.ubuntu.com/ubuntu/ jammy main restricted universe multiverse
# deb-src http://archive.ubuntu.com/ubuntu/ jammy main restricted universe multiverse

deb http://archive.ubuntu.com/ubuntu/ jammy-updates main restricted universe multiverse
# deb-src http://archive.ubuntu.com/ubuntu/ jammy-updates main restricted universe multiverse

deb http://archive.ubuntu.com/ubuntu/ jammy-security main restricted universe multiverse
# deb-src http://archive.ubuntu.com/ubuntu/ jammy-security main restricted universe multiverse

deb http://archive.ubuntu.com/ubuntu/ jammy-backports main restricted universe multiverse
# deb-src http://archive.ubuntu.com/ubuntu/ jammy-backports main restricted universe multiverse

deb http://archive.canonical.com/ubuntu/ jammy partner
# deb-src http://archive.canonical.com/ubuntu/ jammy partner

https://gist.github.com/hakerdefo/9c99e140f543b5089e32176fe8721f5f