assuming you got it up and running already, eventually through PXE
Check what exact version you got installed
lsb_release -a
Get a lease to proceed remotely
ip addr dhclient -v NETIF apt update apt install openssh-server
and eventually continue through ssh
systemctl stop network-manager systemctl disable network-manager
and see Better Networking for Ubuntu
cp -pi /etc/default/grub /etc/default/grub.dist vi /etc/default/grub #GRUB_TIMEOUT_STYLE=hidden GRUB_TIMEOUT=3 GRUB_CMDLINE_LINUX_DEFAULT="" GRUB_CMDLINE_LINUX="net.ifnames=0 biosdevname=0 mitigations=0" #netcfg/do_not_use_netplan=true #ipv6.disable=1 #i915.enable_psr=0 #amdgpu.exp_hw_support=1 update-grub
Eventually validate that networking get correctly setup at boot time by rebooting the box
reboot
apt install vim-nox xxd #nvi elvis-tiny update-alternatives --config vi update-alternatives --config editor
Clean-up the configuration file
mv -i /etc/apt/sources.list /etc/apt/sources.list.dist
grep -vE '^#|^$' /etc/apt/sources.list.dist > /etc/apt/sources.list
vi /etc/apt/sources.list
e.g.
deb http://mirrors.online.net/ubuntu focal main restricted universe multiverse deb http://mirrors.online.net/ubuntu focal-updates main restricted universe multiverse deb http://mirrors.online.net/ubuntu focal-backports main restricted universe multiverse deb http://security.ubuntu.com/ubuntu focal-security main restricted universe multiverse
and check that the repositories point to the nearest mirror
#http://fr.archive.ubuntu.com/ubuntu/ #http://ru.archive.ubuntu.com/ubuntu/
Alternatively, you can build your own configuration with some helper
And in case you have an HTTP PROXY on your network for that purpose
nmap -p 3142 x.x.x.x
vi /etc/apt/apt.conf.d/02proxy
Acquire::http { Proxy "http://x.x.x.x:3142"; };
apt update
Check for major release uprgade
do-release-upgrade
Proceed with patches
cat /etc/apt/apt.conf.d/02proxy apt update apt full-upgrade
and see Ubuntu Server Operations for further maintenance
Install a few more packages.
export DEBIAN_FRONTEND=noninteractive
Bare-metal
apt install \
ethtool \
hwinfo \
screen \
sudo
#ifupdown \
#ifupdown2 \
#xfsprogs \
#xfsdump \
Server system
openssh-server \
openssh-client \
and even more for any kind of system incl. containers that you need to troubleshoot
apt install \
apt-utils \
apt-transport-https \
bzip2 \
curl \
dnsutils \
dos2unix \
git \
htop \
iputils-ping \
iotop \
ksh \
less \
lftp \
lsb-release \
lynx \
man-db \
manpages \
mc \
mlocate \
net-tools \
netcat \
nmap \
pwgen \
software-properties-common \
sysstat \
telnet \
unzip \
vim-nox \
wget \
whois \
xxd
#elvis-tiny \
#nvi \
#inetutils-ping
update-alternatives --config vi
update-alternatives --config editor
Make it a true server
systemctl get-default systemctl set-default multi-user.target
On Ubuntu, add $HOME/bin to your PATH
cat /etc/environment
mv -i /etc/environment /etc/environment.dist
vi /etc/environment
PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:$HOME/bin"
source /etc/environment
echo $PATH
cp -pi /etc/bash.bashrc /etc/bash.bashrc.dist
vi /etc/bash.bashrc
On Debian, replace the whole root condition
update-alternatives --config editor cp -pi /etc/profile /etc/profile.dist vi /etc/profile PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:$HOME/bin" source /etc/profile echo $PATH cp -pi /etc/bash.bashrc /etc/bash.bashrc.dist vi /etc/bash.bashrc
take a shot at slackware’s post-install guide and eventually consider those additions
#already defined on Slackware
[[ -z $HOSTNAME ]] && HOSTNAME=`uname -n`
[[ -f /etc/debian_version ]] && export DEBIAN_FRONTEND=noninteractive
export LANGUAGE="en_US:en"
export LC_ALL="en_US.UTF-8"
#export LC_COLLATE="C.UTF-8"
export LANG=en_US.UTF-8
apply at once
#debian/ubuntu source /etc/bash.bashrc #centos source /etc/bashrc
and check if Perl is happy with the locales
perl -e exit
Setup time and date
Either setup outbound email
apt install \ postfix bsd-mailx rsyslog #pmailq mailutils
or just disable the shit (that’s a friendly word, don’t take it badly)
systemctl status postfix systemctl stop postfix systemctl disable postfix
And eventually setup GNU/Screen
warning: setlocale: LC_ALL: cannot change locale (en_US.UTF-8)
==> quick fix
locale-gen en_US.UTF-8 update-locale LANG=en_US.UTF-8 #dpkg-reconfigure locales
==> full fix, check the current setting,
locale
(re-)generate the locale
apt install language-pack-en-base locale-gen en_US.UTF-8 update-locale en_US.UTF-8 dpkg-reconfigure locales cat /etc/default/locale locale
LANGUAGE and LC_ALL are still missing. Add those the brutal way,
cat >> /etc/bash.bashrc <<EOF export LANGUAGE="en_US.UTF-8" export LC_ALL="en_US.UTF-8" EOF source /etc/bash.bashrc
at startup
systemctl status rc-local vi /etc/rc.local #!/bin/bash #nothing here yet chmod +x /etc/rc.local
at shutdown
cat > /lib/systemd/system/rc-local-shutdown.service <<-EOF [Unit] Description=/etc/rc.local_shutdown Compatibility ConditionFileIsExecutable=/etc/rc.local_shutdown DefaultDependencies=no After=rc-local.service basic.target Before=shutdown.target [Service] ExecStop=/etc/rc.local_shutdown StandardInput=tty RemainAfterExit=yes [Install] WantedBy=shutdown.target EOF vi /etc/rc.local_shutdown #!/bin/bash #nothing here yet chmod +x /etc/rc.local_shutdown systemctl daemon-reload systemctl enable rc-local-shutdown.service
tested on Bionic
On a bare-metal system, prevent the system from clearing the screen after boot (equivalent of getty --noclear)
#systemctl edit getty@tty1 ls -lF /etc/systemd/system/getty.target.wants/ vi /lib/systemd/system/getty@.service [Service] TTYVTDisallocate=no systemctl daemon-reload
draft/untested
Revert to default installed pkgs,
dpkg --get-selections >output dpkg --set-selections <output apt-get dselect-upgrade
We do not need the hostname to change dynamically
#systemctl stop systemd-hostnamed.service #systemctl disable systemd-hostnamed.service
…and countless daemons to disable
What failed at system’s startup?
systemctl list-units --failed systemctl list-units --state failed
how can I remove the clear screen before login https://askubuntu.com/questions/58097/how-can-i-remove-the-clear-screen-before-login
Prevent the console from clearing the screen? https://serverfault.com/questions/255969/prevent-the-console-from-clearing-the-screen
Configure Locales in Ubuntu https://www.thomas-krenn.com/en/wiki/Configure_Locales_in_Ubuntu
How can I execute command on startup (rc.local alternative) on Ubuntu 16.10 https://askubuntu.com/questions/886620/how-can-i-execute-command-on-startup-rc-local-alternative-on-ubuntu-16-10
(dead link) https://askubuntu.com/questions/952300/how-can-i-execute-command-on-shutdown-rc-local-alternative-on-ubuntu