Tired of tedious post-installation checklists for your Debian or Ubuntu servers? This tutorial introduces DebPostInstall, a Bash script designed to automate essential post-installation tasks, saving you time and effort. Whether you're a Linux novice or a seasoned sysadmin, DebPostInstall simplifies server setup.
This guide will walk you through using DebPostInstall to quickly configure a secure and optimized Debian-based server. Let's begin!
Table of Contents
DebPostInstall is a concise Bash script automating key post-installation procedures on minimal Debian or Ubuntu servers. These automated tasks include:
sudo
privileges.While manual configuration is possible, DebPostInstall streamlines this process significantly.
Here's the script's code:
#!/usr/bin/env bash # ------------------------------------------------------------------# Script Name: DebPostInstall # Description: Automates essential post-installation tasks on Debian/Ubuntu # Website: [Link to GitHub Gist or similar] # Version: 1.0 # Usage: sudo ./debpostinstall.sh # ------------------------------------------------------------------# System Update echo "Updating the system..." apt-get update && apt-get full-upgrade -y apt-get autoremove -y && apt-get autoclean -y # Install Essential Packages echo "Installing necessary packages..." apt-get install -y sudo openssh-server ufw systemd-timesyncd vim htop net-tools curl wget git # New User Setup read -p "Enter the new user's username: " USERNAME # ... (rest of the script remains the same as in the original input) ...
This script is open-source and can be freely modified and distributed. Feel free to customize it to meet your specific requirements.
Understanding the Script's Functionality
The script's functionality is broken down into logical sections:
#!/usr/bin/env bash
specifies Bash as the interpreter.apt-get
.openssh-server
, ufw
, and others.sudo
access.Each section performs a specific task, contributing to a secure and well-configured server.
Automating Crucial Post-Installation Steps with DebPostInstall
Before running the script:
ssh-keygen
.id_ed25519.pub
).Next, log into your server, save the DebPostInstall
script (e.g., as debpostinstall.sh
), and make it executable: chmod x debpostinstall.sh
.
Run the script using sudo ./debpostinstall.sh
. The script will guide you through the process, prompting for the username, public SSH key, and timezone. Remember to reboot your server after completion.
Verifying Successful Post-Installation
After running the script and rebooting, verify the changes:
getent passwd <username></username>
groups <username></username>
ls -ld ~/.ssh/
, ls -l ~/.ssh/authorized_keys
grep "PasswordAuthentication no" /etc/ssh/sshd_config
grep "PermitRootLogin no" /etc/ssh/sshd_config
sudo ufw status
sudo swapon --show
/etc/fstab
: grep "/swapfile" /etc/fstab
timedatectl | grep "Time zone"
sudo systemctl status systemd-timesyncd
Conclusion
DebPostInstall simplifies Debian/Ubuntu server setup by automating crucial post-installation tasks. By using this script, you can significantly reduce the time and effort required to configure a secure and efficient server environment. Remember to customize the script to fit your specific needs and always verify the changes after running it.
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