Things to do after installing Debian

Initial Setup and User Configuration

Add User to sudoers:

su -
apt install sudo
usermod -aG sudo [user]
exit
logout

Log back in as the user.

System Utilities and Services

Install Basic Services:

sudo apt install avahi-daemon
sudo shutdown -r now

Reboot the system to apply changes. Log back in after reboot.

SSH Key Configuration:

ssh-copy-id (UserName)@(ComputerName).local

GUI Management (if needed):

Disable GUI:

sudo systemctl set-default multi-user.target

Enable GUI:

sudo systemctl set-default graphical.target

Serial Port Access

Adding a User to tty and dialout Groups:

sudo usermod -a -G tty [username]
sudo usermod -a -G dialout [username]

System Updates and Package Installation

Update and Upgrade Packages:

sudo apt update
sudo apt upgrade -y

Install Development Tools and Utilities:

sudo apt install build-essential screen fail2ban htop rsync vim -y
sudo apt install tmux curl git ncdu python3-pip python-is-python3 python-dev-is-python3 -y

Create an Update Script

Script to Automate Updates:

Create a new script file, e.g., update_script.sh and make it executable:

nano update_script.sh
# Add the following content to the file:
#!/bin/bash
sudo apt update
sudo apt full-upgrade -y
sudo apt autoremove -y
sudo apt autoclean
flatpak update
sudo snap refresh
# Make the script executable:
chmod +x update_script.sh