assuming you’ve set it up already
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
find about your nearest mirror
wget -qO - mirrors.ubuntu.com/mirrors.txt mirror=...
and point the repositories against it e.g.
guest=jammy cat > /etc/apt/sources.list <<EOF deb $mirror $guest main restricted universe multiverse deb $mirror $guest-updates main restricted universe multiverse deb $mirror $guest-backports main restricted universe multiverse deb http://security.ubuntu.com/ubuntu $guest-security main restricted universe multiverse EOF
for debian it would rather look like this.
deb $mirror $guest main contrib non-free non-free-firmware deb $mirror $guest-updates main contrib non-free non-free-firmware deb $mirror $guest-backports main contrib non-free non-free-firmware deb http://security.debian.org/debian-security $guest-security main contrib non-free non-free-firmware # buster/updates
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"; };
export DEBIAN_FRONTEND=noninteractive
apt update
apt dist-upgrade
dpkg -l | grep ^rc
dpkg -l | grep ^rc | grep -v linux-
dpkg -l | grep ^rc | awk '{print $2}' | xargs dpkg --purge
apt autoremove --purge
apt purge ubuntu-advantage-tools
rm -rf /var/lib/update-manager/
rm -rf /var/lib/ubuntu-advantage/
rm -rf /etc/ubuntu-advantage/
unset DEBIAN_FRONTEND
apt install mlocate unattended-upgrades colordiff htop net-tools
dpkg-reconfigure unattended-upgrades
updatedb
locate .dpkg-dist
locate .ucf-dist
# seen on ubuntu22
diff -bu /etc/default/nfs-common.ucf-dist /etc/default/nfs-common
mv /etc/default/nfs-common.ucf-dist /etc/default/nfs-common
vi /etc/apt/sources.list apt update apt dist-upgrade
check for major release uprgade
do-release-upgrade
proceed with patches
apt update apt full-upgrade
and see ubuntu-ops for further maintenance
Install a few more packages.
export DEBIAN_FRONTEND=noninteractive
vi /etc/apt/apt.conf.d/50disable-pipeline
Acquire::http::Pipeline-Depth 0;
Bare-metal
apt install \
ethtool \
hwinfo
Server system
openssh-server \
openssh-client \
and even more for any kind of system incl. some container that you need to troubleshoot
apt install locales
dpkg-reconfigure locales
perl -e exit
apt install \
apt-transport-https \
apt-utils \
bash-completion \
biff \
bzip2 \
colordiff \
curl \
dialog \
dnsutils \
dos2unix \
elvis-tiny \
git \
htop \
iftop \
ifupdown \
iputils-ping \
iotop \
ksh \
less \
lftp \
lsb-release \
lynx \
man-db \
manpages \
mlocate \
mtr \
net-tools \
netcat-traditional \
ngrep \
nmap \
ntpdate \
procps \
pwgen \
screen \
software-properties-common \
sysstat \
telnet \
traceroute \
tzdata \
unzip \
uuid \
uuid-runtime \
wget \
whois
choose a mailing system
msmtp
dma
this one we try to avoid
sudo
ntp
ntpstat
and those ones are redundant
ifupdown2 nvi # elvis-tiny preferred ncat netcat-openbsd iputils-tracepath inetutils-ping # iputils-ping is preferred (PTR-capable) tcptraceroute
eventually additional tools
xfsprogs xfsdump xxd
and in case this is really a workstation
apt purge elvis-tiny apt purge nvi apt install vim-nox
define some defaults
update-alternatives --config vi
update-alternatives --config editor
git config pull.rebase false # merge (the default strategy)
list packages from specific repo e.g. for mongodb
grep ^Package /var/lib/apt/lists/repo.mongodb.org_apt_ubuntu_dists_xenial_mongodb-org_3.4_* | cut -f3 -d: | uniq
How to select the fastest apt mirror on Ubuntu Linux https://linuxconfig.org/how-to-select-the-fastest-apt-mirror-on-ubuntu-linux
https://askubuntu.com/questions/8560/how-do-i-find-out-which-repository-a-package-comes-from
https://serverfault.com/questions/252333/list-all-packages-from-a-repository-in-ubuntu-debian
https://askubuntu.com/questions/786334/proxy-problems-after-upgrade-to-ubuntu-16-04-apt-1-2
https://serverfault.com/questions/48724/100-non-interactive-debian-dist-upgrade
https://wiki.debian.org/SimplePackagingTutorial
https://unix.stackexchange.com/questions/305435/debian-dpkg-dist-files-after-apt-upgrade