How To Configure Basic Settings for NixOS
NixOS is a declarative, reproducible, and immutable Linux distribution built around the Nix package manager. Unlike traditional Linux distributions, where system configurations are managed imperatively (by editing files manually), NixOS uses a single configuration file (/etc/nixos/configuration.nix) to define the entire system state.
This makes NixOS ideal for servers, home labs, and developers who want a consistent, reproducible environment.
🔹 Key Features of NixOS
📜 Declarative Configuration – All settings are defined in configuration.nix.
♻️ Rollback Support – Easily revert changes using generation-based system management.
📦 Atomic Upgrades – No partial upgrades; everything is built as a complete system.
🔄 Reproducibility – Identical configurations produce identical results on any machine.
🚀 Flexible Package Management – Supports multiple package versions using Nix.
Basic Configuration in NixOS
Since you are running NixOS as a VM in Proxmox with UEFI and Hyprland, here’s how to configure basic settings like a static IP and installing QEMU guest agent.
1️⃣ Configure a Static IP Address
NixOS manages networking declaratively via configuration.nix.
Steps to Set a Static IP:
Open the configuration file:
sudo nano /etc/nixos/configuration.nix
Add or modify the networking section:
networking = {
useDHCP = false;
interfaces.enp0s18 = {
ipv4.addresses = [
{
address = "192.168.1.100"; # Change to your desired IP
prefixLength = 24;
}
];
ipv4.routes = [
{
address = "0.0.0.0";
prefixLength = 0;
via = "192.168.1.1"; # Replace with your gateway/router IP
}
];
};
};
Replace enp0s18 with your actual network interface (find it with ip a).
Update the IP, subnet, and gateway based on your network.
Apply the changes:
sudo nixos-rebuild switch
Verify with:
ip a
2️⃣ Install and Enable QEMU Guest Agent
Since you’re running NixOS in Proxmox, you should install the QEMU guest agent to enable features like proper shutdown, memory ballooning, and IP reporting.
Steps to Install and Enable QEMU Guest Agent:
Edit configuration.nix:
sudo nano /etc/nixos/configuration.nix
Add the following under services:
services.qemuGuest.enable = true;
Apply the changes:
sudo nixos-rebuild switch
Check if the guest agent is running:
systemctl status qemu-guest-agent
Resources & Links:
https://nixos.org/manual/nixos/stable/
https://nixos.org/
https://www.proxmox.com/en/
🌸 Buy me a coffee :
https://buymeacoffee.com/liv4it
🌸 Support channel & make donation :
https://www.paypal.me/aminenina/10
🌸 Subscribe for more videos :
Youtube: https://www.youtube.com/user/aminosninatos
🌸 Follow me On Social Media
Facebook : https://www.facebook.com/aminosninatos/
***********************************************************************
🌸 How To Install NixOS On Proxmox
https://youtu.be/KRrwJkb1xpk
🌸 How To Install & Configure Technitium DNS Server on Proxmox
https://youtu.be/m3lNqy3HAvA
🌸 How To Use The Awesome Linux Bat Command
https://youtu.be/N50jo1gat7M
🌸 Windows Subsystem for Linux WSL2 Commands
https://youtu.be/mO3Cqb9zYPM
🌸 This Little Trick Will Prevent You From Messing Up With Your Application Database
https://youtu.be/BdFo21oxKgw
🌸 PIP The Package Manager for Python
https://youtu.be/aO7o2fMKWx0
🌸 How to read Crystal Disk Info
https://youtu.be/N3tUXypxNYk
🌸 How To Monitor the Health of Your Hard Drive in Linux using SMART
https://www.youtube.com/watch?v=z1z9R...
🌸 Linux iotop: Monitor your disk Input/Output
https://www.youtube.com/watch?v=pWG4v...
🌸 How To use the “du” (Disk Usage) Command in Linux
https://www.youtube.com/watch?v=RA4bM...
🌸 How To Install And Configure CrowdSec on pfSense
https://youtu.be/p4sAHjtboMI
🌸 How to Install And Configure pfBlockerNG On pfSense
https://youtu.be/AGOcaKijLu4
🌸 How To Enable Automatic Backups In pfSense
https://youtu.be/mFMKqUvPJFw
🌸 How To Apply System Patches For pfSense CE (Community Edition)
https://youtu.be/qs4sRnNdpYY
🌸 How To Setup VLANs on pfSense In Proxmox
https://youtu.be/EpFQD-HtwXk
🌸 How To Install QEMU Guest Agent On pfSense VM In Proxmox
https://youtu.be/c88-byEL7UM
🌸How To Install The world's most popular workflow automation platform n8n On Proxmox
https://youtu.be/J1cpJRuTHwE
🌸How To Setup Notifications On Uptime Kuma a Self Hosted Monitoring Application
https://youtu.be/Cp-rAatifMk
🌸How To Install Uptime Kuma a Self Hosted Monitoring Application on Proxmox
https://youtu.be/cCxgkHd0E9Y
🌸How To Install Vyos an Amazing Open Source Router On Proxmox
https://youtu.be/dscAQIoDU7w
🌸How To Install an SSL Certificate on Proxmox
https://youtu.be/lCkrsaDEiT4
🌸 How To Lower The Power Use of Proxmox Server
https://youtu.be/FJiEeHmiiH0
🌸 How To Install Packages on Proxmox VM with Terraform
https://youtu.be/RRJrLTeU67Y
***********************************************************************
#NixOS #proxmox #linux