Links

Useful commande lignes

# updates
adg  # sudo apt update && sudo apt upgrade
sudo snap refresh

sudo reboot
sudo poweroff

APT (Advanced Package Tool)

Packages for 20.04 arm64

zsh - oh my zsh

# install zsh
apt install zsh zsh-syntax-highlighting
# zsh install zsh-common

# install oh-my-zsh and set zsh as default shell for the current user
sh -c "$(wget -O- https://raw.githubusercontent.com/ohmyzsh/ohmyzsh/master/tools/install.sh)"

~/.zshrc

plugins=(
    alias-finder
    colored-man-pages
    common-aliases
    copybuffer
    debian
    extract
    fd
    git
    ripgrep
    sudo
    systemd
    wd)

# don't store in history commands prefixed with a space (test with: history | tail)
setopt HIST_IGNORE_SPACE

# add hostname to PROMPT only for ssh connection
if [[ -n $SSH_CONNECTION ]]; then
    PROMPT="%m ${PROMPT}"
fi

# must be loaded last
source /usr/share/zsh-syntax-highlighting/zsh-syntax-highlighting.zsh

zsh-antigen: plugin manager
zsh-autosuggestions: autosuggestions
zsh-syntax-highlighting: syntax highlighting
zsh-theme-powerlevel9k: theme (deprecated)

netplan

/etc/netplan/01-netcfg.yaml

network:
  version: 2
  renderer: networkd
  ethernets:
    eth0:
      dhcp4: yes
      # addresses: [192.168.0.x/24]
      # gateway4: 192.168.0.y
      nameservers:
        addresses: [192.168.0.x, 192.168.0.y]  # set multiple DNS servers

# test the configuration, the configuration is applied for 120 seconds then reverted
sudo netplan try

# apply changes
sudo netplan apply
# creates the file /run/systemd/network/10-netplan-eth0.network

# check the DNS servers
systemd-resolve --status | grep 'DNS Servers' -A2

# display current DHCP lease
netplan ip leases [interface]

# debugging the generation of the file /run/systemd/network/10-netplan-eth0.network
sudo netplan --debug generate

UFW configuration

sudo ufw allow OpenSSH       # port 22
sudo ufw allow 'Nginx Full'  # port 80 443
sudo ufw allow DNS           # port 53 (dnsmasq)

PHP 8+

sudo add-apt-repository ppa:ondrej/php

sudo add-apt-repository ppa:ondrej/nginx-mainline  # new features, updates, bugfixes
sudo add-apt-repository ppa:ondrej/nginx           # no new features, major bugfixes only, annual release
sudo add-apt-repository ppa:ondrej/apache2

uWSGI

Doesn't seem to work with PHP 8.2 and Ubuntu 20.04

With Ubuntu 20.04, ondrej ppa and PHP 8.2 installed, the following dependencies are wrongly installed:
php7.4-cli php7.4-common php7.4-json php7.4-opcache php7.4-phpdbg php7.4-readline

!!! UNABLE to load uWSGI plugin: libphp7.so: cannot open shared object file: No such file or directory !!!

# better use --plugin option instead of the following workaround
sudo ln -s /usr/lib/libphp8.so /usr/lib/libphp7.so

MariaDB

ai mariadb-server

# set root password, remove anonymous users, disallow root login remotely, remove test database
sudo mysql_secure_installation

# connection with unix_socket
sudo mariadb

Upgrade to MariaDB 11.1

# add MariaDB APT repository
curl -LsS https://downloads.mariadb.com/MariaDB/mariadb_repo_setup | sudo bash -s -- --mariadb-server-version=11.1

# stop the service, then uninstall the version 10.3, then install the version 11
sc-stop mariadb-server
sudo apt remove mariadb-server
ai mariadb-server

mariadb -V  # test

PostgreSQL 15+

# add the postgre official package repository
sudo sh -c 'echo "deb http://apt.postgresql.org/pub/repos/apt $(lsb_release -cs)-pgdg main" > /etc/apt/sources.list.d/pgdg.list'
# import the GPG signing key for the repository
wget -qO- https://www.postgresql.org/media/keys/ACCC4CF8.asc | sudo tee /etc/apt/trusted.gpg.d/pgdg.asc &>/dev/null

# install specifically the version 15 instead of the meta-package postgresql to avoid unwanted upgrade
ai postgresql-15

PostgreSQL_and_Ubuntu

.NET

Download .NET 7.0

# download ASP.NET Core Runtime
wget https://download.visualstudio.microsoft.com/download/pr/712946ec-0b43-436c-abfb-3abab81f6cad/c83ba8df4dab39957ffa5e93604f0b32/aspnetcore-runtime-7.0.10-linux-arm64.tar.gz

# extract the archive in the dotnet folder
mkdir dotnet
tar xf aspnetcore-runtime-7.0.10-linux-arm64.tar.gz -C dotnet

sudo mv dotnet /usr/share
sudo chown root:root -R /usr/share/dotnet
sudo ln -s /usr/share/dotnet/dotnet /usr/bin/dotnet

dotnet --info  # test

Cron

By default the standard output and error of cron jobs are sent by email to the current user.
With postfix installed, you can map system user like root to another mailbox with the /etc/aliases file.
The use of cronic allow to send an email only if the cron job fails.

Security

Ban IPs with ipsum

Applications

Name	Version	Comment
btop	1.2.13	resource monitor (snap)
certbot	2.6	use snap (native 0.40)
Dovecot	2.3.7.2	Mail Delivery Agent
MariaDB	11.1.2	use MariaDB repository (native 10.3.38)
NGINX	1.24	use ondrej ppa (native 1.22)
PHP	8.2.10	use ondrej ppa (native 7.4.3)
Postfix	3.4.13	Mail Transfer Agent
PostgreSQL	15.4	use PDGD repository (native 12.15)
Ready Media	1.2.1	DLNA server
Roundcube	1.6.2	Webmail, use GitHub release (native 1.4.3)

Shell tools

Name	Description
bat	A cat clone with syntax highlighting and Git integration. batcat
du-dust	more intuitive du unable to install
exa	modern replacement for ls unable to install
fd-find	file name search tool
ripgrep	file content search tool
tldr	simplified and community-driven man pages
trash-cli	command line trash

Amule

wget https://old-releases.ubuntu.com/ubuntu/pool/universe/a/amule/amule-daemon_2.3.2-6_arm64.deb
wget https://old-releases.ubuntu.com/ubuntu/pool/universe/a/amule/amule-common_2.3.2-6_all.deb
wget https://old-releases.ubuntu.com/ubuntu/pool/universe/a/amule/amule-utils_2.3.2-6_arm64.deb

ai ./amule-daemon_2.3.2-6_arm64.deb ./amule-common_2.3.2-6_all.deb ./amule-utils_2.3.2-6_arm64.deb

Ubuntu arm 20.04

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