Debian New System Useful Commands

February 22, 2022

Update System

# switch to user root
su -
apt update && apt upgrade
apt install sudo
usermod -aG sudo rayed 
# logout from root & user

Network

Enable New Interface

Ref: https://wiki.debian.org/NetworkConfiguration

sudo vi /etc/network/interfaces
:
auto enp0s8
iface enp0s8 inet dhcp
:
sudo ifup enp0s8

NTP

sudo vi /etc/systemd/timesyncd.conf 
:
NTP=sa.pool.ntp.org
:
sudo systemctl restart systemd-timesyncd
timedatectl timesync-status

Security

Secure SSH

sudo vi /etc/ssh/sshd_config
:
PasswordAuthentication no
:
sudo systemctl restart ssh

Firewall

Ref: https://wiki.debian.org/Uncomplicated%20Firewall%20%28ufw%29

sudo apt install -y ufw
sudo ufw allow ssh
sudo ufw enable
sudo ufw status 

# Other useful commands
# sudo ufw app list
# sudo ufw allow "WWW Full"
# sudo ufw allow 8080/tcp

Misc

Disable VIM mouse integration

Ref: https://unix.stackexchange.com/a/397464

sudo vi /etc/vim/vimrc.local
:
source $VIMRUNTIME/defaults.vim
let skip_defaults_vim = 1
set mouse=r
:

Change Default Editor

sudo apt install -y vim
sudo update-alternatives --set editor /usr/bin/vim.basic

Change Hostname

sudo hostnamectl set-hostname dev1

Development Tools

sudo apt install build-essential

Python 3

sudo apt install -y python3-venv
python3 -m venv venv
. venv/bin/activate
pip install django
pip freeze > requirements.txt

Docker

Ref: https://docs.docker.com/engine/install/debian/

sudo apt install -y ca-certificates curl gnupg lsb-release
curl -fsSL https://download.docker.com/linux/debian/gpg | sudo gpg --dearmor -o /usr/share/keyrings/docker-archive-keyring.gpg
echo \
    "deb [arch=$(dpkg --print-architecture) signed-by=/usr/share/keyrings/docker-archive-keyring.gpg] https://download.docker.com/linux/debian \
    $(lsb_release -cs) stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null
sudo apt update
sudo apt install -y docker-ce docker-ce-cli containerd.io

Test:

sudo docker run hello-world

Run from non root:

usermod -aG docker rayed  # logout to take effect
docker run hello-world